Weather Observations for Champaign-Urbana, Illinois
Illinois State Water Survey, Prairie Research Institute, University of Illinois
September 2015
  Midnight to Midnight 8 AM Observations  
  Temperature (F) Degree Days Precipitation (inches) Soil Temperature (F) Temp. (F)  
Day High Time (CST) Low Time (CST) Mean Depart Heating Cooling Precipitation Snowfall Snow Depth 4 inch 8 inch Morning Low Comments
1 87 2:11 PM 67 3:33 AM 77 +5 0 12 0.18 0.0 0 78 75 67 thunderstorms, fog
2 91 2:31 PM 68 4:42 AM 80 +9 0 15 0.48 0.0 0 77 75 68 thunderstorms, fog
3 92 3:06 PM 67 5:31 AM 80 +9 0 15 0.02 0.0 0 78 76 67 rain, fog
4 93 2:46 PM 67 4:51 AM 80 +9 0 15 0.00 0.0 0 79 77 67 fog
5 90 3:01 PM 66 2:02 AM 78 +8 0 13 1.18 0.0 0 79 77 66 thunderstorms
6 94 2:10 PM 67 5:33 AM 81 +11 0 16 0.00 0.0 0 79 77 67 fog
7 93 1:25 PM 67 4:35 AM 80 +10 0 15 0.00 0.0 0 80 77 67  
8 89 11:30 AM 68 6:04 PM 79 +10 0 14 0.00 0.0 0 80 78 68  
9 79 2:17 PM 64 11:59 PM 72 +3 0 7 1.07 0.0 0 78 76 68 rain, thunder, fog
10 84 2:04 PM 58 5:29 AM 71 +2 0 6 0.00 0.0 0 76 75 58  
11 71 1:04 PM 55 11:36 PM 63 -5 2 0 0.44 0.0 0 75 74 61 rain, fog
12 65 2:18 PM 49 11:57 PM 57 -11 8 0 0.07 0.0 0 72 71   rain
13 72 3:48 PM 46 5:21 AM 59 -9 6 0 T 0.0 0 68 69 46 rain
14 81 2:13 PM 47 5:32 AM 64 -3 1 0 0.00 0.0 0 69 69 47  
15 83 2:18 PM 54 6:01 AM 69 +2 0 4 0.00 0.0 0 71 70 54  
16 84 1:30 PM 52 5:55 AM 68 +2 0 3 0.00 0.0 0 70 70 52  
17 85 12:57 PM 56 5:49 AM 71 +5 0 6 0.00 0.0 0 71 70 56  
18 82 11:52 AM 68 8:49 AM 75 +10 0 10 1.56 0.0 0 74 71 68 thunderstorms, fog
19 71 1:36 PM 52 11:58 PM 62 -3 3 0 1.41 0.0 0 74 72   thunderstorms, rain, fog
20 73 1:53 PM 48 5:44 AM 61 -4 4 0 0.00 0.0 0 69 69 48  
21 77 2:56 PM 50 3:56 AM 64 0 1 0 0.00 0.0 0 69 69 50  
22 81 2:49 PM 50 5:28 AM 66 +2 0 1 0.00 0.0 0 68 68 50  
23 85 2:47 PM 55 3:49 AM 70 +7 0 5 0.00 0.0 0 69 69 55  
24 83 2:07 PM 56 5:59 AM 70 +7 0 5 0.00 0.0 0 70 69 56  
25 83 1:08 PM 56 6:23 AM 70 +8 0 5 0.00 0.0 0 71 69 56  
26 80 1:24 PM 58 5:09 AM 69 +7 0 4 0.00 0.0 0 70 69 58  
27 77 1:57 PM 60 1:16 AM 69 +8 0 4 0.00 0.0 0 72 70 60  
28 81 2:55 PM 61 6:13 AM 71 +10 0 6 0.03 0.0 0 72 70 61 rain, fog
29 72 11:42 AM 58 11:55 PM 65 +4 0 0 0.00 0.0 0 73 71 62 fog
30 69 2:44 PM 50 11:57 PM 60 0 5 0 0.00 0.0 0 69 68 51  
Avg/Sum 81.6   58.0   70.0   30 181 6.44 0.0 0 73.3 72.0    
Highest 94   68   81   8 16 1.56 0.0 0        
Lowest 65   46   57   0 0 0.00 0.0 0        
Normal 78.2   54.2   66.2   79 115 3.13 0.0          
Departure 3.4   3.8   3.8   -49 66 3.31 0.0          
Days 90 6 Days 32 0                        
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
"Days 90" means # of days with a high temperature of 90 or more, "Days 32" means # of days with a low temperature of 32 or less