Overview
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Stagnant high pressure allowed temperatures to climb into the 90s to around 100 degrees for much of the first week of September. Heat indices exceeded 110 degrees at some locations. |
Temperatures
The following images are observed high temperatures for August 31 and early September, as well as 1-week average temperature and departure from normal. Please note that data is interpolated and the shaded colors may not match your location exactly. Below the images are text listings of temperatures and heat indices from the event.
 August 31 Highs |
 September 1 Highs |
 September 2 Highs |
 September 3 Highs |
 September 4 Highs |
 September 5 Highs |
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DAILY MAX AND MIN TEMPERATURES AUGUST 31 TO SEPTEMBER 5 2026...
Daily Maximum Temperatures.........................................
8- / S E P T E M B E R
COUNTY Location 31 / 1 / 2 / 3 / 4 / 5
-----------------------------------------------------------------
A MARION Indianapolis 7 WSW 92 / 96 / 95 / 95 / 97 / 95
S DELAWARE Muncie 3 N 91 / 94 / 94 / 95 / 94 / 89
O MONROE Bloomington 5 WSW 91 / 94 / 94 / 95 / 95 / 93
s SHELBY Shelbyville 4 NNW 91 / 93 / 94 / 94 / 96 / 92
TIPPECANOE Lafayette 3 W 91 / 94 / 94 / 95 / 96 / 93
VIGO Terre Haute 5 ESE 93 / 97 / 96 / 97 / 97 / 96
MARION Eagle Creek Airpark 92 / 94 / 94 / 94 / 96 / 92
----------------------------------------------------------------
A BOONE Zionsville 6 NNE 89 / 92 / 92 / 93 / 94 / 91
W CLINTON Frankfort 3 W 90 / M / 91 / 93 / 93 / M
O DAVIESS Washington 3 NE 95 / 98 / 98 / 99 / 99 100
S HAMILTON Fishers 2 SW 91 / 94 / 95 / 95 / 97 / M
HOWARD Kokomo 5 NE 89 / 93 / 94 / 95 / 94 / 90
JOHNSON Greenwood 1 NE 89 / 92 / 92 / 93 / 95 / M
LAWRENCE Bedford 3 SE 94 / 96 / 96 / 97 / 99 / 95
MADISON Anderson 3 E 91 / 94 / 95 / 95 / 96 / M
MONTGOMERY Crawfordsville 5 S 88 / 90 / 91 / 91 / 92 / M
PUTNAM Greencastle 3 ESE 90 / 93 / 93 / 93 / 93 / M
----------------------------------------------------------------
C BARTHOLOMEW Columbus 95 / 97 / 98 / 98 / 99 /
O DAVIESS Elnora 95 / 98 / 98 / M / M /
O DAVIESS Washington 1 W 98 / 99 / 99 / 99 / 99 / 99
P HANCOCK Greenfield 92 / 94 / 95 / 95 / 96 /
HENRY New Castle 3 SW 90 / 93 / 93 / 93 / 95 /
HOWARD Kokomo 3 WSW 89 / 90 / 91 / 91 / 91 /
HOWARD Young America 1 SSE 89 / 91 / 92 / 93 / 92 /
JOHNSON Franklin WWTP 91 / 93 / 93 / 94 / 95 /
LAWRENCE Oolitic Purdue Farm 91 / 93 / 94 / 96 / 98 /
KNOX Vincennes 5 NE 99 101 102 103 /
MADISON Anderson 1 N 93 / 96 / 96 / 96 / 96 /
MARION Castleton 2 S 90 / 93 / 93 / 94 / 95 /
MARION Indianapolis AP 1 S 92 / 94 / 94 / 94 / 96 / 94
MARTIN Shoals 8 S 97 / 99 100 100 101 /
MONTGOMERY Crawfordsville 6 SE 90 / 92 / 92 / 92 / 94 /
MORGAN Martinsville 2 SW 92 / 94 / 94 / 95 /
PARKE Rockville 94 / 96 / 97 / 97 /
RANDOLPH Farmland 5 NNW 90 / 95 / 95 / 95 /
RUSH Rushville 91 / 93 / 92 / 94 / 95 /
SHELBY Shelbyville WWTP 91 / 93 / 94 / 96 /
SULLIVAN Farmersburg TV-2 96 100 100 101 102 /
TIPTON Tipton 5 SW 94 / 95 / 97 / 98 / 97 /
VERMILLION Perrysville 4 WNW 90 / 94 / 95 / 95 / 97 /
-----------------------------------------------------------------
8/31 / 1 / 2 / 3 / 4 / 5
/ S E P T E M B E R
---------------------------------------------------------------------
Daily AM Minimum Temperatures......................................
8- / S E P T E M B E R
COUNTY Location 31 / 1 / 2 / 3 / 4 / 5
-----------------------------------------------------------------
A MARION Indianapolis 7 WSW 72 / 74 / 75 / 75 / 77 / 74
S DELAWARE Muncie 3 N 72 / 75 / 76 / 75 / 74 / 68
O MONROE Bloomington 5 WSW 69 / 71 / 70 / 70 / 70 / 72
s SHELBY Shelbyville 4 NNW 67 / 71 / 69 / 70 / 72 / 70
TIPPECANOE Lafayette 3 W 68 / 71 / 71 / 73 / 72 / 73
VIGO Terre Haute 5 ESE 67 / 73 / 70 / 71 / 71 / 72
MARION Eagle Creek Airpark 70 / 74 / 75 / 75 / 75 / 73
----------------------------------------------------------------
A BOONE Zionsville 6 NNE 65 / 72 / 73 / 73 / 72 / 70
W CLINTON Frankfort 3 W 64 / 73 / M / 73 / 72 / 72
O DAVIESS Washington 3 NE 69 / 69 / 70 / 71 / 73 / 73
S HAMILTON Fishers 2 SW 71 / 75 / 76 / 77 / 74 / 72
HOWARD Kokomo 5 NE 68 / 73 / 74 / 73 / 72 / 69
JOHNSON Greenwood 1 NE M / M / 67 / 72 / 75 / 71
LAWRENCE Bedford 3 SE 69 / 68 / 70 / 72 / 71 / 72
MADISON Anderson 3 E 70 / 73 / 74 / 74 / 73 / 72
MONTGOMERY Crawfordsville 5 S 65 / 70 / 69 / 70 / 69 / 69
PUTNAM Greencastle 3 ESE M / 73 / 73 / 73 / 73 / 73
----------------------------------------------------------------
C DAVIESS Washington 1 W 71 / 72 / 72 / 73 / 74 / 76
O HENRY New Castle 3 SW M / M / 70 / 70 / 70 /
O HOWARD Kokomo 3 WSW M / M / 72 / 72 / 71 /
P KNOX Vincennes 5 NE M / M / 73 / 73 / 73 /
MADISON Anderson 1 N M / M / 71 / 72 / 72 /
MARION Castleton 2 S 69 / 73 / 73 / 74 / 75 /
MARION Indianapolis AP 1 S 69 / 71 / 72 / 72 / 75 /
MARTIN Shoals 8 S 68 / 68 / 71 / 71 / 72 /
MONTGOMERY Crawfordsville 6 SE M / M / 71 / 70 / 74 /
MORGAN Martinsville 2 SW M / M / 68 / 69 / 69 /
PARKE Rockville 68 / 74 / 72 / 74 / 76 / 75
RANDOLPH Farmland 5 NNW 63 / 70 / M / 68 / 66 /
RUSH Rushville 69 / 69 / 70 / M / 71 /
SULLIVAN Farmersburg TV-2 70 / 73 / 72 / 73 / 73 /
TIPTON Tipton 5 SW M / M / 72 / 72 / 72 /
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8/31 / 1 / 2 / 3 / 4 / 5
/ S E P T E M B E R
/////////////////////////////////////////////////////////////////////
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. .
. H E A T I N D E X V A L U E S .
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HIGHEST REPORTED DAILY HEAT INDEX VALUES, SEPTEMBER 1-5, 2026...
A. Tuesday, September 1, 2026........................................
Max Heat
COUNTY Location Index Time / Date Provider
--------------------------------------------------------------------
KNOX Vincennes 5 ENE 112 F 515 PM 9/1 Mesonet
MARTIN Loogootee 1 S 111 F 216 PM 9/1 INDOT
VIGO Lewis 1 N 111 F 715 PM 9/1 Mesonet
HAMILTON Carmel 2 NE 110 F 525 PM 9/1 Mesonet
MONROE Hardin Ridge 110 F 607 PM 9/1 Mesonet
VERMILLION Covington 2 WSW 110 F 356 PM 9/1 Mesonet
--------------------------------------------------------------------
DAVIESS Washington 2 SE 109 F 205 PM 9/1 Mesonet
HENDRICKS Danville 2 ESE 109 F 315 PM 9/1 AWOS
JACKSON Seymour 1 WSW 109 F 618 PM 9/1 Mesonet
LAWRENCE Mitchell 4 NNW 109 F 516 PM 9/1 Mesonet
MARION Beech Grove 2 SE 109 F 455 PM 9/1 Mesonet
MORGAN Martinsville 5 ENE 109 F 235 PM 9/1 Mesonet
TIPPECANOE Lafayette Downtown 109 F 630 PM 9/1 Mesonet
BARTHOLOMEW Columbus 4 WSW 108 F 205 PM 9/1 Mesonet
HANCOCK Mount Comfort 108 F 315 PM 9/1 AWOS
HOWARD Greentown 4 NW 108 F 705 PM 9/1 Mesonet
JOHNSON Edinburgh 3.8 NW 108 F 331 PM 9/1 INDOT
KNOX Bicknell 108 F 310 PM 9/1 EMA
TIPTON Kempton 4 ENE 108 F 500 PM 9/1 Mesonet
DECATUR Greensburg 107 F 645 PM 9/1 Mesonet
HAMILTON Fishers 2 SW 107 F 515 PM 9/1 AWOS
LAWRENCE Bedford 2 ESE 107 F 415 PM 9/1 AWOS
RANDOLPH Lynn 3 WNW 107 F 525 PM 9/1 Mesonet
SULLIVAN Fairbanks 1 NNE 107 F 715 PM 9/1 Mesonet
HENRY Knightstown 3 WNW 106 F 545 PM 9/1 Mesonet
MADISON Pendleton 2 SSE 106 F 345 PM 9/1 Mesonet
BOONE Whitestown 4.5 S 105 F 351 PM 9/1 INDOT
DAVIESS Washington 3 NE 105 F 355 PM 9/1 AWOS
HOWARD Kokomo 5 NE 105 F 356 PM 9/1 AWOS
PARKE Rockville 1 N 105 F 455 PM 9/1 Mesonet
SHELBY 2 E Marietta 105 F 425 PM 9/1 Mesonet
VIGO Terre Haute 5 ESE 105 F 353 PM 9/1 ASOS
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B. Wednesday, September 2, 2026.....................................
Max Heat
COUNTY Location Index Time / Date Provider
-------------------------------------------------------------------
HAMILTON Fishers 3 ENE 111 F 439 PM 9/2 Mesonet
HANCOCK Mount Comfort 111 F 215 PM 9/2 AWOS
VERMILLION Covington 2 WSW 111 F 326 PM 9/2 Mesonet
VIGO Lewis 1 N 111 F 605 PM 9/2 Mesonet
DAVIESS Washington 2 SE 110 F 355 PM 9/2 Mesonet
GREENE Shawnee Hills Farm 110 F 445 PM 9/2 Mesonet
HAMILTON Fishers 2 SW 110 F 415 PM 9/2 AWOS
HANCOCK Greenfield 3 WNW 110 F 415 PM 9/2 Mesonet
HENDRICKS Danville 2 ESE 110 F 355 PM 9/2 AWOS
KNOX Bicknell 110 F 330 PM 9/2 EMA
MARTIN Loogootee 0.7 S 110 F 121 PM 9/2 INDOT
-------------------------------------------------------------------
HOWARD Dunlap Family Farm 109 F 405 PM 9/2 Mesonet
JOHNSON Greenwood 2 SE 109 F 618 PM 9/2 Mesonet
LAWRENECE Oolitic 2.6 WSW 109 F 450 PM 9/2 Mesonet
TIPPECANOE Lafayette Downtown 109 F 620 PM 9/2 Mesonet
HAMILTON Sheridan Airport 108 F 435 PM 9/2 Mesonet
JENNINGS Butlerville 1 W 108 F 510 PM 9/2 Mesonet
MONROE Hardin Ridge 108 F 507 PM 9/2 RAWS
SULLIVAN Sullivan 1.4 SW 108 F 241 PM 9/2 INDOT
TIPTON Kempton 4 WNW 108 F 515 PM 9/2 Mesonet
HENRY Knightstown 3 WNW 107 F 455 PM 9/2 Mesonet
LAWRENCE Bedford 2 ENE 107 F 415 PM 9/2 AWOS
MADISON Pendleton 2 SSE 107 F 400 PM 9/2 Mesonet
DAVIESS Washington 3 NE 106 F 315 PM 9/2 AWOS
DECATUR Greensburg 106 F 605 PM 9/2 Mesonet
JACKSON Cortland 4.2 S 106 F 446 PM 9/2 INDOT
MARION Southport 3 SW 106 F 515 PM 9/2 Mesonet
PARKE Rockville 1 N 106 F 340 PM 9/2 Mesonet
BARTHOLOMEW Columbus Downtown 105 F 435 PM 9/2 Mesonet
BROWN Spearsville 3 SSE 105 F 510 PM 9/2 Mesonet
MONTGOMERY New Market 1 ESE 105 F 624 PM 9/2 Mesonet
PUTNAM Greencastle 2 ESE 105 F 515 PM 9/2 AWOS
PUTNAM Cloverdale 1 NNW 105 F 721 PM 9/2 INDOT
RANDOLPH Farmland 5 NNW 105 F 535 PM 9/2 Mesonet
SHELBY Marietta 2 E 105 F 550 PM 9/2 Mesonet
VIGO Terre Haute 5 ESE 105 F 653 PM 9/2 ASOS
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C. Thursday, September 3, 2026......................................
Max Heat
COUNTY Location Index Time / Date Provider
-------------------------------------------------------------------
HENDRICKS Danville 2 ESE 110 F 515 PM 9/3 AWOS
LAWARENCE Oolitic 2.6 WSW 110 F 235 PM 9/3 Mesonet
TIPPECANOE Lafayette Downtown 110 F 325 PM 9/3 Mesonet
VIGO Lewis 1 N 110 F 505 PM 9/3 Mesonet
-------------------------------------------------------------------
GREENE Shawnee Hills Farm 109 F 610 PM 9/3 Mesonet
HANCOCK Greenfield 3 WNW 109 F 315 PM 9/3 Mesonet
JOHNSON Stones Crossing 2 SW 109 F 405 PM 9/3 Mesonet
KNOX Vincennes 4.5 S 109 F 316 PM 9/3 INDOT
MADISON Summitville 4 WNW 109 F 405 PM 9/3 Mesonet
MARTIN Loogootee 0.7 S 109 F 441 PM 9/3 INDOT
MONROE Hardin Ridge 109 F 107 PM 9/3 RAWS
SULLIVAN Sullivan 1.4 SW 109 F 706 PM 9/3 INDOT
TIPTON Kempton 4 ENE 109 F 255 PM 9/3 Mesonet
VERMILLION Covington 2 SW 109 F 416 PM 9/3 Mesonet
DAVIESS Washington 2 SE 108 F 550 PM 9/3 Mesonet
DELAWARE Muncie 4 S 108 F 315 PM 9/3 Mesonet
HAMILTON Fishers 2 SW 108 F 355 PM 9/3 AWOS
HENRY Knightstown 3 WNW 108 F 355 PM 9/3 Mesonet
HOWARD Dunlap Family Farm 108 F 330 PM 9/3 Mesonet
KNOX Bicknell 108 F 350 PM 9/3 Mesonet
HAMILTON Sheridan Airport 107 F 505 PM 9/3 Mesonet
HANCOCK Mount Comfort 107 F 335 PM 9/3 AWOS
JACKSON Cortland 4.2 S 107 F 316 PM 9/3 INDOT
LAWRENCE Bedford 2 ESE 107 F 415 PM 9/3 AWOS
RANDOLPH Lynn 4 WNW 107 F 335 PM 9/3 Mesonet
BROWN Spearsville 3 SSE 106 F 709 PM 9/3 Mesonet
JENNINGS Butlerville 1 W 106 F 430 PM 9/3 Mesonet
PARKE Bloomingdale 3 W 106 F 455 PM 9/3 Mesonet
PUTNAM Cloverdale 1 NNW 106 F 621 PM 9/3 INDOT
VIGO Terre Haute 5 ESE 106 F 253 PM 9/3 ASOS
BARTHOLOMEW Columbus Downtown 105 F 325 PM 9/3 Mesonet
CLINTON Frankfort 3 W 105 F 255 PM 9/3 AWOS
DAVIESS Washington 3 NE 105 F 315 PM 9/3 AWOS
DECATUR Greensburg 105 F 655 PM 9/3 Mesonet
PUTNAM Greencastle 2 SE 105 F 535 PM 9/3 AWOS
TIPPECANOE Lafayette 8 S 105 F 740 PM 9/3 Mesonet
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D. Friday, September 4, 2026........................................
Max Heat
COUNTY Location Index Time / Date Provider
--------------------------------------------------------------------
MARTIN Loogootee 0.7 S 113 F 256 PM 9/4 INDOT
VERMILLION Covington 2 WSW 112 F 342 PM 9/4 Mesonet
VIGO Lewis 1 N 112 F 455 PM 9/4 Mesonet
GREENE Shawnee Hills Farm 111 F 350 PM 9/4 Mesonet
HAMILTON Carmel 2 W 111 F 400 PM 9/4 Mesonet
HENDRICKS Danville 2 ESE 111 F 235 PM 9/4 AWOS
JENNINGS Butlerville 1 W 111 F 735 PM 9/4 Mesonet
JOHNSON Stones Crossing 1 SW 111 F 230 PM 9/4 Mesonet
HAMILTON Fishers 2 SW 110 F 1255 PM 9/4 AWOS
HAMILTON Sheridan Airport 110 F 505 PM 9/4 Mesonet
HANCOCK Mount Comfort 110 F 255 PM 9/4 AWOS
KNOX Vincennes 5 NE 110 F 405 PM 9/4 Mesonet
KNOX Bicknell 110 F 430 PM 9/4 EMA
LAWRENCE Oolitic 2.6 WSW 110 F 330 PM 9/4 Mesonet
MONROE Hardin Ridge 110 F 607 PM 9/4 RAWS
--------------------------------------------------------------------
LAWRENCE Bedford 2 ESE 109 F 155 PM 9/4 AWOS
MARION Grandview 109 F 430 PM 9/4 Mesonet
PARKE Bloomingdale 3 W 109 F 205 PM 9/4 Mesonet
TIPTON Tipton 1 NW 109 F 445 PM 9/4 Mesonet
BOONE Whitestown 1.8 SE 108 F 700 PM 9/4 Mesonet
HENRY Knightstown 3 WNW 108 F 230 PM 9/4 Mesonet
JACKSON Cortland 4.2 S 108 F 302 PM 9/4 INDOT
KNOX Vincennes 4.5 SW 108 F 342 PM 9/4 INDOT
MADISON Summitville 4 WNW 108 F 225 PM 9/4 Mesonet
PUTNAM Cloverdale 0.8 NNW 108 F 342 PM 9/4 INDOT
SULLIVAN Sullivan 3 ESE 108 F 708 PM 9/4 RAWS
TIPPECANOE Lafayette 8 S 108 F 415 PM 9/4 Mesonet
BARTHOLOMEW Columbus Downtown 107 F 604 PM 9/4 Mesonet
DELAWARE Muncie 4 S 107 F 200 PM 9/4 Mesonet
MADISON Pendleton 2 SSE 107 F 300 PM 9/4 Mesonet
RANDOLPH Lynn 4 WNW 107 F 241 PM 9/4 Mesonet
SULLIVAN Sullivan 1.4 SW 107 F 236 PM 9/4 INDOT
VIGO Terre Haute 5 ESE 107 F 353 PM 9/4 ASOS
BROWN Spearsville 3 SSE 106 F 600 PM 9/4 Mesonet
DAVIESS Washington 3 NE 106 F 455 PM 9/4 AWOS
HOWARD Kokomo 5 NE 106 F 556 PM 9/4 AWOS
JOHNSON Greenwood 1 NE 106 F 355 PM 9/4 AWOS
MONROE Whitehall 1.5 NE 106 F 247 PM 9/4 INDOT
SHELBY Shelbyville 4 NNW 106 F 453 PM 9/4 ASOS
SHELBY Marietta 2 E 106 F 405 PM 9/4 Mesonet
TIPPECANOE Lafayette 3 W 106 F 354 PM 9/4 ASOS
CLINTON Frankfort 3 W 105 F 455 PM 9/4 AWOS
CLINTON Rossville 105 F 540 PM 9/4 Mesonet
MARION Indianapolis Intl Arpt 105 F 454 PM 9/4 ASOS
PUTNAM Greencastle 2 ESE 105 F 615 PM 9/4 AWOS
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E. Saturday, September 5, 2026......................................
Max Heat
COUNTY Location Index Time / Date Provider
--------------------------------------------------------------------
KNOX Vincennes 5 NE 111 F 600 PM 9/5 Mesonet
MARTIN Loogootee 0.7 S 111 F 441 PM 9/5 INDOT
VIGO Lewis 1 N 110 F 405 PM 9/5 Mesonet
--------------------------------------------------------------------
GREENE Shawnee Hills Farm 109 F 455 PM 9/5 Mesonet
LAWRENCE Oolitic 2.6 WSW 109 F 440 PM 9/5 Mesonet
SULLIVAN Sullivan 1.4 SW 109 F 321 PM 9/5 INDOT
HAMILTON Fishers 2 E 108 F 317 PM 9/5 Mesonet
HENDRICKS Danville 2 ESE 108 F 435 PM 9/5 AWOS
MONROE Hardin Ridge 108 F 607 PM 9/5 RAWS
TIPPECANOE West Lafayette 6 NW 108 F 410 PM 9/5 Mesonet
DAVIESS Washington 3 NE 107 F 355 PM 9/5 AWOS
JOHNSON Stones Croppsing 1 SW 107 F 459 PM 9/5 Mesonet
LAWRENCE Bedford 2 ESE 107 F 455 PM 9/5 AWOS
VIGO Terre Haute 5 ESE 107 F 453 PM 9/5 ASOS
HANCOCK Mount Comfort 106 F 415 PM 9/5 AWOS
JACKSON Cortland 4.2 S 106 F 546 PM 9/5 INDOT
MARION Grandview 106 F 320 PM 9/5 Mesonet
PARKE Rockville 106 F 220 PM 9/5 Mesonet
TIPPECANOE Lafayette 3 W 106 F 454 PM 9/5 ASOS
DECATUR Greensburg 8 E 105 F 645 PM 9/5 Mesonet
HAMILTON Casteton 1 N 105 F 355 PM 9/5 AWOS
MADISON Lapel 1 S 105 F 555 PM 9/5 Mesonet
/////////////////////////////////////////////////////////////////////
IV. HIGHEST REPORTED 5-DAY HEAT INDEX VALUES SEPTEMBER 1-5, 2026...
For each Central IN zone
Max Heat
COUNTY Location Index Time / Date Provider
--------------------------------------------------------------------
MARTIN Loogootee 0.7 S 113 F 256 PM 9/4 INDOT
KNOX Vincennes 5 ENE 112 F 515 PM 9/1 Mesonet
VERMILLION Covington 2 WSW 112 F 342 PM 9/4 Mesonet
VIGO Lewis 1 N 112 F 455 PM 9/4 Mesonet
GREENE Shawnee Hills Farm 111 F 350 PM 9/4 Mesonet
HAMILTON Carmel 2 W 111 F 400 PM 9/4 Mesonet
HANCOCK Mount Comfort 111 F 215 PM 9/2 AWOS
HENDRICKS Danville 2 ESE 111 F 235 PM 9/4 AWOS
JENNINGS Butlerville 1 W 111 F 735 PM 9/4 Mesonet
JOHNSON Stones Crossing 1 SW 111 F 230 PM 9/4 Mesonet
DAVIESS Washington 2 SE 110 F 355 PM 9/2 Mesonet
LAWRENCE Oolitic 2.6 WSW 110 F 9/3 and 9/4 Mesonet
MONROE Hardin Ridge 110 F 9/1 and 9/4 RAWS
--------------------------------------------------------------------
HOWARD Dunlap Family Farm 109 F 405 PM 9/2 Mesonet
JACKSON Seymour 1 WSW 109 F 618 PM 9/1 Mesonet
MADISON Summitville 4 WNW 109 F 405 PM 9/3 Mesonet
MARION [Multiple Locations] 109 F 9/1 and 9/4 Mesonets
MORGAN Martinsville 5 ENE 109 F 235 PM 9/1 Mesonet
PARKE Bloomingdale 3 W 109 F 205 PM 9/4 Mesonet
SULLIVAN Sullivan 1.4 SW 109 F 9/3 and 9/5 INDOT
TIPTON [Multiple Locations] 109 F 9/3 and 9/4 Mesonets
BOONE Whitestown 1.8 SE 108 F 700 PM 9/4 Mesonet
BARTHOLOMEW Columbus 4 WSW 108 F 205 PM 9/1 Mesonet
DELAWARE Muncie 4 S 108 F 315 PM 9/3 Mesonet
HENRY Knightstown 3 WNW 108 F 9/3 and 9/4 Mesonet
PUTNAM Cloverdale 0.8 NNW 108 F 342 PM 9/4 INDOT
TIPPECANOE [Multiple Locations] 108 F 9/4 and 9/5 Mesonets
DECATUR Greensburg 107 F 645 PM 9/1 Mesonet
RANDOLPH Lynn 4 WNW 107 F 9/3 and 9/4 Mesonet
BROWN Spearsville 3 SSE 106 F 9/3 and 9/4 Mesonet
SHELBY Marietta 2 E 106 F 405 PM 9/4 Mesonet
MONTGOMERY New Market 1 ESE 105 F 624 PM 9/2 Mesonet
CLINTON [Multiple Locations] 105 F 9/3 and 9/4 Multiple
--------------------------------------------------------------------
FOUNTAIN Kingman 3 WNW 104 F 415 PM 9/4 Mesonet
WARREN Pine Village 3 ESE 103 F 505 PM 9/4 Mesonet
RUSH Rushville 101 F 245 PM 9/4 Mesonet
/////////////////////////////////////////////////////////////////////
Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers
for their dedication. Not all data listed are considered official.
Historical
HISTORICAL PERSPECTIVE OF 95F+ STREAKS...95F+ MAXS IN SEPTEMBER
A. Reverse Chronicle of All 5+ Day Streaks at Indianapolis...........
/ Range /
DATES /Days / MIN T / All Daily MAX Temps
---------------------------------------------------------------------
SEP 1 - 3, 2026*/ 5 / 74-77 / 96-95-95-97-95
JUN 28-7/8, 2012 / 11 / 70-81 / 104-103-97-95-98-98-102-103-105x2
JUL 19-23, 2011 / 5 / 77-79 / 96-98-100-97-96
AUG 9 -13, 2010 / 5 / 70-78 / 95-97-98-96-97
---------------------------------------------------------------------
JUL 4-10, 1988 / 7 / 62-71 / 96-98-99-99-101-100-96
JUL 19-23, 1983 / 5 / 72-77 / 95-96-98-99-99
---------------------------------------------------------------------
AUG 27-9/2, 1953 / 7 / 63-70 / 95-96-97-95-97-100-100
AUG 23-29, 1948 / 7 / 64-70 / 95-95-96-97-97-95-95
JUL 25-30, 1941 / 6 / 74-79 / 96-98-99-99-100-99
JUL 24-30, 1940 / 7 / 74-79 / 98-97-96-95-98-99
AUG 18-26, 1936 / 9 / 66-82 / 98-100-98-100-101-96-98-96-95
JUL 4-17, 1936 / 14 / 68-82 / 95-99-98-101-104-103-105-104-103
103-106-103-96-98
JUL 20-26, 1934 / 7 / 76-82 / 103-106-103-102-105-105-98
JUL 25-31, 1916 / 7 / 72-76 / 96-98-100-100-98-95-97
JUL 21-28, 1901 / 8 / 74-78 / 100-106-96-101-96-96-96-95
JUL 6-10, 1897 / 5 / 71-77 / 95-97-95-99-95
JUN 25-29, 1890 / 5 / 72-76 / 95-97-95-95-95-93
JUL 27-8/5, 1887 / 10 / 65-73 / 96-97-98-101-97-97-96-97-99-98
JUL 12-18, 1887 / 7 / 60-77 / 95-97-96-96-98-100-100
JUL 7-12, 1881 / 6 / 80-82 / 95-96-98-101-100-98
----------------------------------------------------------------------
B. Chronicle at Indianapolis for *ALL SEPTEMBER* 3-day 95F streaks...
(A once every 20 year return period)
/ Range /
DATES / Days / MIN T / All Daily MAX Temps
--------------------------------------------------------------------
SEP 1 - 3, 2026* / 5 / 74-77 / 96-95-95-97-95
AUG 31-9/3, 2011 / 4 / 66-73 / 95-99-99-100
SEP 4 - 6, 1954 / 3 / 61-67 / 98-100-99
AUG 27-9/2, 1953 / 7 / 63-70 / 95-96-97-95-97-100-100
SEP 13-16, 1939 / 4 / 64-76 / 99-100-100-96
SEP 7 - 9, 1939 / 3 / 63-71 / 98-97-98
SEP 5 - 8, 1922 / 4 / 72-75 / 96-95-95-95
SEP 5 - 7, 1899 / 3 / 68-74 / 98-98-98
----------------------------------------------------------------------
C. SEPTEMBERs with most Days Reaching 95F+ at Indianapolis...
Rk YEAR / Days 95F+ / Highest Date(s)
------------------------------------------------------------
1. 1939 / 7 / 100 F 9/14, 9/15
T2. 2026 / 5** / 97 F 9/4
T2. 1922 / 5 / 96 F 9/2, 9/5
4. 1953 / 4 / 100 F 9/1, 9/2
T5. 2011 / 3 / 100 F 9/3
T5. 1954 / 3 / 100 F 9/5
T5. 1925 / 3 / 95 F 9/3, 9/5, 9/6
T5. 1899 / 3 / 98 F 9/5, 9/6, 9/7
T9. 2013 / 2 / 96 F 9/10
T9. 1991 / 2 / 96 F 9/13
T9. 1964 / 2 / 96 F 9/7
T9. 1913 / 2 / 96 F 9/2, 9/3
T9. 1897 / 2 / 96 F 9/12
////////////////////////////////////////////////////////////////////
HISTORICAL PERSPECTIVE OF PAST INDIANAPOLIS HEAT WAVES
(5+ consecutive days reaching 90+ degrees)
A. Reverse Chronicle of 25 Heat Waves Since 2000 at Indianapolis...
/ Range / Range
DATES / Days / MAXs / MINs
------------------------------------------------------
AUG 31-SEP 5, 2026* / 6 / 92-97 / 72-77
JUL 14 - 18 , 2026* / 5 / 91-93 / 70-76
JUN 29-JUL 4, 2026* / 6 / 90-93 / 71-77
JUL 23 - 27 , 2025 / 5 / 90-93 / 69-75
JUN 21 - 28 , 2025 / 8 / 90-93 / 68-77
AUG 24 - 30 , 2024 / 7 / 90-96 / 67-73
------------------------------------------------------
JUL 3 - 9 , 2020 / 7 / 91-94 / 69-73
JUL 17 - 21 , 2019 / 5 / 90-93 / 71-79
SEP 2 - 6 , 2018 / 5 / 90-93 / 70-73
JUN 29-JUL 5, 2018 / 7 / 90-94 / 70-76
SEP 21 - 26 , 2017 / 6 / 91-93 / 64-71
JUL 21 - 25 , 2016 / 5 / 90-92 / 72-77
SEP 2 - 8 , 2015 / 7 / 90-94 / 66-71
AUG 26 - 31 , 2013 / 6 / 90-96 / 64-74
JUL 29-AUG 4, 2012 / 7 / 91-97 / 62-74
JUL 21 - 27 , 2012 / 7 / 91-103 / 61-79
JUL 15 - 19 , 2012 / 5 / 93-101 / 72-77
JUN 27-JUL 13, 2012 / 17 / 91-104 / 59-81
JUL 17-AUG 8, 2011 / 23 / 90-100 / 64-79
AUG 28-SEP 1, 2010 / 5 / 91-96 / 61-71
AUG 9 - 15 , 2010 / 7 / 92-98 / 70-78
JUL 31-AUG 15, 2007 / 14 / 90-96 / 67-78
JUL 15 - 19 , 2006 / 5 / 90-92 / 70-72
-----------------------------------------------------
JUL 31-AUG 5, 2002 / 6 / 92-96 / 67-75
JUL 1 - 5 , 2002 / 5 / 90-93 / 70-74
---------------------------------------------------------------------
B. All *SEPTEMBER* Heat Waves in Indianapolis Area (Since 1871)...
(5+ consecutive days reaching 90+ degrees)
(A once every 9-years return period)
/ Range / Range
DATES Days / MINs / MAXs
------------------------------------------------------
AUG 31 - SEPT 5, 2026 6 / 72-77 / 92-97
SEPTEMBER 2 - 6, 2018 5 / 70-73 / 90-93
SEPTEMBER 21-26, 2017 6 / 64-71 / 91-93
SEPTEMBER 2 - 8, 2015 7 / 66-71 / 90-94
------------------------------------------------------
SEPTEMBER 12-16, 1991 5 / 64-70 / 92-96
AUG 26 - SEPT 4, 1973 10 / 67-72 / 90-92
SEPTEMBER 6-10, 1964 5 / 54-64 / 90-96
SEPTEMBER 8-13, 1961 6 / 67-70 / 90-91
SEPTEMBER 15-19, 1955 5 / 58-66 / 91-94
------------------------------------------------------
SEPTEMBER 12-16, 1939 5 / 59-76 / 94-100
SEPTEMBER 10-15, 1936 7 / 67-75 / 90-95
SEPTEMBER 13-17, 1927 5 / 70-75 / 90-95
SEPTEMBER 4- 9, 1922 6 / 72-75 / 92-96
SEPTEMBER 4-10, 1912 7 / 66-73 / 90-94
AUG 30 - SEPT 3, 1898 5 / 72-73 / 90-93
SEPTEMBER 7-16, 1897 10 / 61-70 / 92-96
SEPTEMBER 17-22, 1895 6 / 68-73 / 90-94
SEPTEMBER 16-27, 1891 12 / 63-67 / 90-93
Note: Heat waves spanning August into September were included
if at least 3 days occurred in September
---------------------------------------------------------------------
C. 21 YEARS with 3+ Heat Waves in Indianapolis Area (since 1871)...
(A once every 7-years return period)
/ Heat / Days of Every / Days 90+ / JUN-SEPT AVG
YEAR / Waves / Heat Wave & Sum / Year Sum / Max T Min T
-----------------------------------------------------------------
2026 / 3 / 6 5 6 17 / 21 /
2012 / 4 / 17 5 7 7 36 / 51 / 85.6 63.7
1995 / 3 / 7 6 12 25 / 34 / 84.0 62.8
1991 / 3 / 5 5 5 15 / 32 / 85.0 62.1
1988 / 4 / 5 8 6 11 30 / 49 / 86.4 61.8
1983 / 4 / 14 5 6 13 38 / 58 / 86.8 63.7
-----------------------------------------------------------------
1955 / 3 / 8 5 5 18 / 35 / 84.0 61.6
1954 / 3 / 7 6 6 19 / 50 / 85.8 62.4
1953 / 3 / 5 9 9 23 / 45 / 85.6 61.0
1941 / 3 / 6 12 6 24 / 45 / 85.3 64.7
1936 / 3 / 15 19 6 40 / 55 / 87.2 65.9
1934 / 4 / 5 7 6 9 27 / 46 / 85.1 65.4
1933 / 4 / 5 7 5 5 22 / 42 / 85.8 65.6
1931 / 3 / 6 8 6 20 / 41 / 84.9 66.2
1930 / 3 / 5 5 5 15 / 28 / 83.7 63.5
1916 / 4 / 5 10 6 5 26 / 34 / 82.4 62.6
1914 / 4 / 5 7 9 8 29 / 41 / 83.7 63.6
1913 / 4 / 7 6 6 5 24 / 42 / 83.7 63.5
------------------------------------------------------------------
1895 / 4 / 6 5 5 6 22 / 42 / 85.3 63.1
1894 / 3 / 7 5 6 18 / 43 / 85.4 62.4
1887 / 3 / 5 8 12 25 / 38 / 83.8 62.0
------------------------------------------------------------------
AVERAGE
OF ABOVE / 3.4 / 7 7 7 8 24 / 42 / 85.1 63.6
..................................................................
AVERAGE
1871-2025/ 1.1 / AV for all = 7 8 / 21 / 82.2 62.4
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