Severe Thunderstorm and Heavy Rainfall Potential Continues

A low pressure center tracking across the Great Lakes and its associated cold front extending across the Southern Plains will focus occasional showers and thunderstorms through tonight. A few of these thunderstorms may become severe alongside heavy rainfall that may cause flash flooding; Portions of the Southern Plains would be the greatest threat for these hazards through tonight. Read More >

Summer Season (June-August) Key Points:

Rainfall was highly variable across the region this summer.
Much above normal totals were reported south of a Jacksonville to Danville line.
Areas from Taylorville east to Charleston and south to Effingham saw nearly twice the normal summer rainfall (8-9" above normal). This was near their top 5 wettest summers.
A few areas in central Illinois saw below normal rainfall, including Lincoln, Bloomington/Normal, Clinton, and portions of northern Peoria Co. and southern Knox Co. Rain deficits were generally 1-2" in these areas.
Summer temperatures were 1-2 degrees above normal in most locations.

Summer Season Precipitation, Temperature, and Departure from Normal Maps:

Summer Season Climate Data:

Site	Precipitation	Departure from Normal	Average Temperature	Departure from Normal	Notes
Charleston	20.71"	+8.96"	76.5	+1.9	4th wettest summer
Danville	14.50"	+1.80"	74.8	+1.2
Decatur	16.04"	+3.79"	75.3	+0.3
Effingham	19.44"	+8.03"	76.6	+1.6	6th wettest summer
Flora	18.56"	+7.13"	77.2	+1.8
Galesburg	14.25"	+1.60"	74.7	+1.9
Havana	14.06"	+1.90"	N/A	N/A
Jacksonville	15.96"	+4.11"	75.7	+1.5
Lincoln	10.92"	-2.38"	73.1	-0.3
Normal	11.23"	-0.64"	73.8	+1.0
Olney	16.46"	+4.74"	76.0	+1.0
Paris	12.79"	+0.10"	73.3	-0.6
Peoria	13.95"	+3.33"	75.6	+1.9
Springfield	16.95"	+5.31"	76.6	+2.4
Tuscola	16.33"	+3.87"	74.5	+0.5
Urbana	15.73"	+2.76"	74.7	+1.2

Links below are the seasonal climate summaries for area cities. Only the summaries for Peoria, Springfield and Lincoln are considered "official", meaning they are the station of record for their respective locations. The other summaries are "supplemental", meaning another location in the area is the official climate station for that city.

Peoria -- Peoria International Airport
Springfield -- Abraham Lincoln Capital Airport
Lincoln -- Lincoln NWS office
Champaign -- University of Illinois - Willard Airport
Decatur -- Decatur Airport
Lawrenceville -- Lawrenceville-Vincennes International Airport
Mattoon -- Coles County Airport

Climate data for other area cities is available at http://www.nws.noaa.gov/climate/xmacis.php?wfo=ilx

August Key Points:

West central and southeast Illinois saw much above normal rainfall. Totals in these areas were 3-5" above normal, or more than twice the monthly average.
Portions of central into eastern Illinois saw below normal rainfall. Totals in these areas were up to 1" below normal.
Temperatures averaged 1-2 degrees above normal for most locations.
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August Precipitation, Temperature, and Departure from Normal Maps:

August Climate Data:

Site	Precipitation	Departure from Normal	Average Temperature	Departure from Normal
Charleston	4.06"	+1.13"	76.7	+2.1
Danville	4.10"	+0.62"	75.3	+1.8
Decatur	3.06"	-0.71"	75.2	+0.1
Effingham	5.29"	+2.54"	75.9	+1.0
Flora	6.64"	+3.50"	76.2	+1.1
Galesburg	5.66"	+1.69"	74.8	+2.1
Havana	7.90"	+4.14"	N/A	N/A
Jacksonville	8.12"	+4.61"	74.8	-0.5
Lincoln	2.94"	-0.98"	73.7	+0.7
Normal	3.22"	-0.58"	74.3	+1.8
Olney	6.15"	+2.95"	75.4	+0.2
Paris	3.49"	-0.52"	73.0	-0.8
Peoria	6.08"	+3.24"	75.5	+1.7
Springfield	6.32"	+3.08"	76.7	+2.5
Tuscola	2.93"	-0.13"	74.3	+0.6
Urbana	4.15"	+0.22"	75.3	+1.9

Links below are the monthly climate summaries for area cities. Only the summaries for Peoria, Springfield and Lincoln are considered "official", meaning they are the station of record for their respective locations. The other summaries are "supplemental", meaning another location in the area is the official climate station for that city.

Peoria -- Peoria International Airport
Springfield -- Abraham Lincoln Capital Airport
Lincoln -- Lincoln NWS office
Champaign -- University of Illinois - Willard Airport
Decatur -- Decatur Airport
Lawrenceville -- Lawrenceville-Vincennes International Airport
Mattoon -- Coles County Airport

Climate data for other area cities is available at http://www.nws.noaa.gov/climate/xmacis.php?wfo=ilx

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Severe Thunderstorm and Heavy Rainfall Potential Continues

Summer & August Climate Summaries