Weather Observations for Champaign-Urbana, Illinois
Illinois State Water Survey, Prairie Research Institute, University of Illinois
Annual 2015 NORMALS
  High Depart Low Depart Mean Depart Precipitation Depart Snowfall Depart HDD Depart CDD Depart High Low Mean Precipitation Snowfall HDD CDD
January 32.2 -0.7 16.5 -0.2 24.6 -0.2 1.43 -0.62 4.4 -2.4 1253 -3 0 0 32.9 16.7 24.8 2.05 6.8 1256 0
February 27.9 -9.8 9.0 -11.2 18.8 -10.3 1.23 -0.90 12.4 6.6 1295 286 0 0 37.7 20.2 29.0 2.13 5.8 1009 0
March 47.4 -2.5 27.4 -2.6 37.6 -2.4 1.70 -1.16 8.4 5.8 849 72 0 -1 49.9 30.0 40.0 2.86 2.6 777 1
April 64.7 1.9 42.9 1.8 54.0 2.1 3.62 -0.06 0.0 -0.4 331 -71 1 -9 62.8 41.1 51.9 3.68 0.4 402 10
May 76.2 2.8 54.8 3.2 65.7 3.2 6.07 1.18 0.0 0.0 97 -49 118 49 73.4 51.6 62.5 4.89 0.0 146 69
June 81.2 -1.3 62.7 0.8 72.2 0.0 9.16 4.82 0.0 0.0 8 -9 224 -9 82.5 61.9 72.2 4.34 0.0 17 233
July 82.9 -2.1 64.0 -0.9 73.6 -1.3 4.22 -0.48 0.0 0.0 2 1 270 -39 85.0 64.9 74.9 4.70 0.0 1 309
August 82.5 -1.2 61.1 -2.0 72.1 -1.3 3.16 -0.77 0.0 0.0 3 -2 223 -42 83.7 63.1 73.4 3.93 0.0 5 265
September 81.6 3.4 58.0 3.8 70.0 3.8 6.44 3.31 0.0 0.0 30 -49 181 66 78.2 54.2 66.2 3.13 0.0 79 115
October 67.4 2.2 44.9 2.3 56.4 2.5 1.24 -2.02 0.0 -0.1 271 -87 5 -9 65.2 42.6 53.9 3.26 0.1 358 14
November 56.1 5.5 35.3 3.3 45.9 4.6 4.41 0.73 1.8 0.9 573 -138 0 0 50.6 32.0 41.3 3.68 0.9 711 0
December 46.9 10.2 33.3 12.1 40.4 11.5 7.47 4.74 0.0 -6.6 764 -353 0 0 36.7 21.2 28.9 2.73 6.6 1117 0
                             
Annual 62.2 0.7 42.5 0.9 52.6 1.0 50.15 8.77 27.0 3.8 5476 -402 1022 6 61.6 41.6 51.6 41.38 23.2 5878 1016
Winter                 26.1   6186      
Spring 62.7 0.7 41.7 0.8 52.4 1.0 11.39 -0.04 8.4 5.4 1277 -48 119 39
Summer 82.2 -1.5 62.6 -0.7 72.6 -0.9 16.54 3.57 0.0 0.0 13 -10 717 -90
Fall 68.4 3.7 46.1 3.1 57.5 3.7                
Notes:
Temperatures are from midnight to midnight (calendar day) and are in degrees Fahrenheit
Precipitation and snowfall are measured at 8 am and represent the previous 24 hours, T means a trace of precipitation
Time is always Central Standard Time (CST)
Heating and cooling degree days use a base temperature of 65F
Normal refers to the new 1981-2010 average
Winter season for snowfall and heating degree days starts on July 1, 2014, and ends on June 30, 2015.