Severe Thunderstorms in the Central Plains; Heavy Rainfall in the Mississippi and Tennessee Valleys; Critical Fire Weather in the Southwest

Scattered severe storms capable of large to very large hail, severe wind gusts, and a few tornadoes will be possible across the central Plains. Heavy rain will pose a flash flood threat across portions of the Mississippi Valley into the Tennessee and Ohio Valleys. Hot, dry and windy conditions will continue to bring a critical fire weather threat from the Southwest into the Great Basin. Read More >

Morristown, TN Area Seasonal Climate Summary

All normals are based on 30 year climate period from 1981 - 2010.

Chattanooga (CHA) period of record is from 1879 - Current.

Knoxville (TYS) period of record is from 1871 - Current.

Tri-Cities (TRI) period of record is from 1937 - Current.

Seasonal Averages/Totals and Normals

Chattanooga Seasonal Averages/Totals and Normals

                        

526

CXUS54 KMRX 012229

CLSCHA



CLIMATE REPORT

NATIONAL WEATHER SERVICE MORRISTOWN, TN

629 PM EDT MON JUN 01 2026



...................................



...THE CHATTANOOGA AIRPORT CLIMATE SUMMARY FOR THE SEASON, FROM

3/1/2026 TO 5/31/2026...



CLIMATE NORMAL PERIOD: 1991 TO 2020

CLIMATE RECORD PERIOD: 1879 TO 2026



WEATHER         OBSERVED          NORMAL  DEPART

                VALUE   DATE(S)   VALUE   FROM

                                          NORMAL

................................................

TEMPERATURE (F)

RECORD

 HIGH             99   05/29/1941

 LOW               2   03/07/1899

HIGHEST           91   05/17

LOWEST            27   03/17

AVG. MAXIMUM    78.0

AVG. MINIMUM    53.6

MEAN            65.8               61.6     4.2

DAYS MAX >= 90     2

DAYS MIN <= 32     3



PRECIPITATION (INCHES)

RECORD

 MAXIMUM       29.50   1920

 MINIMUM        5.84   1986

TOTALS         12.81              14.15   -1.34

DAILY AVG.      0.14

DAYS >= .01       29

DAYS >= .10       19

DAYS >= .50       10

DAYS >= 1.00       4

GREATEST

 24 HR. TOTAL   1.79   05/21 TO 05/22



SNOWFALL (INCHES)

TOTALS             T

SINCE 7/1        0.8

SNOWDEPTH AVG.     0

DAYS >= TRACE      1

DAYS >= 1.0        0

GREATEST

 SNOW DEPTH        0



DEGREE DAYS

HEATING TOTAL    247                555    -308

COOLING TOTAL    344                245      99

................................................



WIND (MPH)

HIGHEST WIND SPEED/DIRECTION    29/330    DATE  04/28

HIGHEST GUST SPEED/DIRECTION    39/350    DATE  03/12



SKY COVER

AVERAGE SKY COVER           0.53





WEATHER CONDITIONS. NUMBER OF DAYS WITH

THUNDERSTORM             13     MIXED PRECIP               0

HEAVY RAIN               13     RAIN                      19

LIGHT RAIN               33     FREEZING RAIN              0

LT FREEZING RAIN          0     HAIL                       1

HEAVY SNOW                0     SNOW                       1

LIGHT SNOW                1     SLEET                      0

FOG                      26     FOG W/VIS <= 1/4 MILE      1

HAZE                      5



-  INDICATES NEGATIVE NUMBERS.

R  INDICATES RECORD WAS SET OR TIED.

MM INDICATES DATA IS MISSING.

T  INDICATES TRACE AMOUNT.



$$

Knoxville Seasonal Averages/Totals and Normals

                        

527

CXUS54 KMRX 012229

CLSTYS



CLIMATE REPORT

NATIONAL WEATHER SERVICE MORRISTOWN, TN

629 PM EDT MON JUN 01 2026



...................................



...THE KNOXVILLE MCGHEE TYSON AIRPORT CLIMATE SUMMARY FOR THE SEASON, FROM

3/1/2026 TO 5/31/2026...



CLIMATE NORMAL PERIOD: 1991 TO 2020

CLIMATE RECORD PERIOD: 1871 TO 2026



WEATHER         OBSERVED          NORMAL  DEPART

                VALUE   DATE(S)   VALUE   FROM

                                          NORMAL

................................................

TEMPERATURE (F)

RECORD

 HIGH             96   05/31/2011

                       05/22/1941

 LOW               1   03/03/1980

HIGHEST           92   05/18

LOWEST            26   03/17

AVG. MAXIMUM    76.0

AVG. MINIMUM    52.5

MEAN            64.2               59.4     4.8

DAYS MAX >= 90     3                1.1     1.9

DAYS MIN <= 32     5                8.5    -3.5



PRECIPITATION (INCHES)

RECORD

 MAXIMUM       23.93   1874

 MINIMUM        5.80   1925

TOTALS         10.94              13.73   -2.79

DAILY AVG.      0.12

DAYS >= .01       29

DAYS >= .10       18

DAYS >= .50        9

DAYS >= 1.00       5

GREATEST

 24 HR. TOTAL   1.64   03/11 TO 03/12



SNOWFALL (INCHES)

TOTALS           0.1

SINCE 7/1        3.6

SNOWDEPTH AVG.     0

DAYS >= TRACE      2

DAYS >= 1.0        0

GREATEST

 SNOW DEPTH        0



DEGREE DAYS

HEATING TOTAL    346                703    -357

COOLING TOTAL    293                185     108

................................................



WIND (MPH)

HIGHEST WIND SPEED/DIRECTION    41/260    DATE  03/16

HIGHEST GUST SPEED/DIRECTION    56/260    DATE  03/16



SKY COVER

AVERAGE SKY COVER           0.60





WEATHER CONDITIONS. NUMBER OF DAYS WITH

THUNDERSTORM             14     MIXED PRECIP               0

HEAVY RAIN                8     RAIN                      14

LIGHT RAIN               32     FREEZING RAIN              0

LT FREEZING RAIN          0     HAIL                       0

HEAVY SNOW                0     SNOW                       0

LIGHT SNOW                2     SLEET                      0

FOG                      30     FOG W/VIS <= 1/4 MILE      2

HAZE                     30



-  INDICATES NEGATIVE NUMBERS.

R  INDICATES RECORD WAS SET OR TIED.

MM INDICATES DATA IS MISSING.

T  INDICATES TRACE AMOUNT.



$$

Tri-Cities Seasonal Averages/Totals and Normals

                        

528

CXUS54 KMRX 012229

CLSTRI



CLIMATE REPORT

NATIONAL WEATHER SERVICE MORRISTOWN, TN

629 PM EDT MON JUN 01 2026



...................................



...THE TRI-CITIES AIRPORT CLIMATE SUMMARY FOR THE SEASON, FROM

3/1/2026 TO 5/31/2026...



CLIMATE NORMAL PERIOD: 1991 TO 2020

CLIMATE RECORD PERIOD: 1937 TO 2026



WEATHER         OBSERVED          NORMAL  DEPART

                VALUE   DATE(S)   VALUE   FROM

                                          NORMAL

................................................

TEMPERATURE (F)

RECORD

 HIGH             94   05/31/2011

                       05/22/1941

 LOW              -2   03/03/1980

HIGHEST           93   05/18

LOWEST            22   03/18

AVG. MAXIMUM    74.9

AVG. MINIMUM    44.9

MEAN            59.9               56.2     3.7

DAYS MAX >= 90     4

DAYS MIN <= 32    12



PRECIPITATION (INCHES)

RECORD

 MAXIMUM       18.84   2020

 MINIMUM        5.67   2007

TOTALS          7.12              11.57   -4.45

DAILY AVG.      0.08

DAYS >= .01       30

DAYS >= .10       17

DAYS >= .50        5

DAYS >= 1.00       1

GREATEST

 24 HR. TOTAL   1.22   03/11 TO 03/12



SNOWFALL (INCHES)

TOTALS           0.5

SINCE 7/1       12.7

SNOWDEPTH AVG.     T

DAYS >= TRACE      3

DAYS >= 1.0        0

GREATEST

 SNOW DEPTH       MM



DEGREE DAYS

HEATING TOTAL    596                910    -314

COOLING TOTAL    149                 95      54

................................................



WIND (MPH)

HIGHEST WIND SPEED/DIRECTION    29/240    DATE  03/13

HIGHEST GUST SPEED/DIRECTION    40/250    DATE  03/13



SKY COVER

AVERAGE SKY COVER           0.59





WEATHER CONDITIONS. NUMBER OF DAYS WITH

THUNDERSTORM              8     MIXED PRECIP               0

HEAVY RAIN               13     RAIN                      14

LIGHT RAIN               29     FREEZING RAIN              0

LT FREEZING RAIN          0     HAIL                       0

HEAVY SNOW                0     SNOW                       1

LIGHT SNOW                3     SLEET                      0

FOG                      42     FOG W/VIS <= 1/4 MILE      8

HAZE                      5



-  INDICATES NEGATIVE NUMBERS.

R  INDICATES RECORD WAS SET OR TIED.

MM INDICATES DATA IS MISSING.

T  INDICATES TRACE AMOUNT.



$$

Monthly Averages, Totals and Normals

For recent monthly data, please review the Monthly Weather Summary product at: http://w2.weather.gov/climate/index.php?wfo=mrx.

MOST RECENT RECORDS

For recent records, please visit our Record Event Report (RER) products for Chattanooga (CHA), Knoxville (TYS), and Tri-Cities (TRI).

                        
237
SXUS74 KMRX 300819
RERCHA

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
417 AM EDT SAT MAY 30 2026

...RECORD DAILY HIGH MINIMUM TEMPERATURE SET AT CHATTANOOGA,
TN...

THE LOW TEMPERATURE YESTERDAY AT CHATTANOOGA, TN WAS 71 DEGREES.

THIS BREAKS THE OLD RECORD HIGH MINIMUM TEMPERATURE FOR MAY THE
29TH...WHICH WAS 70 IN 1991

$$

                        
819
SXUS74 KMRX 230828
RERTYS

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
426 AM EDT MON MAR 23 2026

...RECORD DAILY HIGH MINIMUM TEMPERATURE SET AT KNOXVILLE MCGHEE
TYSON AIRPORT...

THE LOW TEMPERATURE YESTERDAY AT THE KNOXVILLE AIRPORT WAS 64
DEGREES.

THIS BREAKS THE OLD RECORD HIGH MINIMUM TEMPERATURE FOR MARCH THE
22ND...WHICH WAS 63 IN 1907

$$

                        
405
SXUS74 KMRX 270817
RERTRI

RECORD EVENT REPORT
NATIONAL WEATHER SERVICE MORRISTOWN TN
415 AM EDT WED MAY 27 2026

...RECORD DAILY HIGH MINIMUM TEMPERATURE SET AT TRI-CITIES REGIONAL
AIRPORT...

THE LOW TEMPERATURE YESTERDAY AT THE TRI-CITIES AIRPORT WAS 67
DEGREES.

THIS BREAKS THE OLD RECORD HIGH MINIMUM TEMPERATURE FOR MAY THE
26TH...WHICH WAS 66 IN 2015

$$

Local Radar