Weather Observations for Champaign-Urbana, Illinois
Illinois State Water Survey, Prairie Research Institute, University of Illinois
May 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 70 2:46 PM 40 5:09 AM 55 -3 10 0 0.00 0.0 0 54 54 40  
2 76 2:34 PM 49 5:21 AM 63 +5 2 0 0.00 0.0 0 58 57 49  
3 81 2:20 PM 54 5:32 AM 68 +10 0 3 0.00 0.0 0 61 59 54  
4 80 1:01 PM 58 6:07 AM 69 +10 0 4 0.21 0.0 0 63 61 58 rain, thunder
5 84 1:06 PM 60 3:34 AM 72 +13 0 7 0.00 0.0 0 65 62 60  
6 85 1:55 PM 59 1:18 AM 72 +13 0 7 0.00 0.0 0 66 63 59  
7 85 1:50 PM 58 4:28 AM 72 +12 0 7 0.00 0.0 0 66 64 58  
8 83 12:04 PM 63 12:01 AM 73 +13 0 8 0.10 0.0 0 68 65 63  
9 76 12:46 PM 62 5:34 AM 69 +9 0 4 0.23 0.0 0 68 66 62 rain
10 80 4:21 PM 62 11:52 PM 71 +10 0 6 0.65 0.0 0 70 67 63 rain, thunderstorms
11 72 2:55 PM 52 11:47 PM 62 +1 3 0 0.50 0.0 0 70 68 62 rain, thunderstorms
12 63 4:11 PM 47 3:23 AM 55 -6 10 0 0.25 0.0 0 65 65 47 rain
13 66 3:12 PM 43 5:10 AM 55 -7 10 0 0.00 0.0 0 62 62 43  
14 71 1:45 PM 47 2:53 AM 59 -3 6 0 0.00 0.0 0 63 63 47  
15 83 2:15 PM 59 5:13 AM 71 +9 0 6 0.39 0.0 0 65 63 59 rain
16 79 1:14 PM 64 4:44 AM 72 +9 0 7 0.15 0.0 0 69 66 64 rain, thunder
17 82 1:59 PM 64 12:29 AM 73 +10 0 8 0.26 0.0 0 70 67 64 rain, thunderstorm, fog
18 82 1:50 PM 52 11:59 PM 67 +4 0 2 T 0.0 0 71 68 66  
19 62 2:49 PM 43 4:45 AM 53 -11 12 0 0.00 0.0 0 67 67 43  
20 51 10:04 AM 44 7:48 PM 48 -16 17 0 0.00 0.0 0 65 65 44  
21 66 2:58 PM 44 2:24 AM 55 -9 10 0 0.09 0.0 0 62 62 44 rain
22 77 4:24 PM 48 4:08 AM 63 -2 2 0 0.00 0.0 0 62 62 48  
23 80 2:31 PM 56 4:33 AM 68 +3 0 3 0.00 0.0 0 66 64 56  
24 84 1:29 PM 62 2:47 AM 73 +8 0 8 0.00 0.0 0 69 66 62  
25 82 3:50 PM 66 11:59 PM 74 +8 0 9 0.02 0.0 0 71 68 67 rain
26 78 1:42 PM 65 12:55 AM 72 +6 0 7 0.01 0.0 0 72 69 65 mist
27 80 3:30 PM 61 11:53 PM 71 +5 0 6 0.19 0.0 0 70 68 64 rain
28 86 3:33 PM 55 4:18 AM 71 +4 0 6 0.00 0.0 0 68 67 55  
29 85 1:12 PM 65 4:20 AM 75 +8 0 10 0.00 0.0 0 72 69 65  
30 76 11:38 AM 49 11:51 PM 63 -4 2 0 0.20 0.0 0 73 70 65 rain
31 56 4:06 PM 48 6:07 AM 52 -16 13 0 2.82 0.0 0 67 67 48 rain, thunder
Avg/Sum 76.2   54.8   65.7   97 118 6.07 0.0   66.4 64.6    
Highest 86   66   75   17 10 2.82 0.0 0        
Lowest 51   40   48   0 0 0.00 0.0 0        
Normal 73.4   51.6   62.5   146 69 4.89 0.0          
Departure 2.8   3.2   3.2   -49 49 1.18 0.0          
Days 90 0 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