Official 1981-2010 Climate Normals City: DWIGHT State: IL ID: 112500 Latitude: 41.1067 Longitude: -88.4111 Elevation: 627.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 30.7 35.2 47.7 61.2 72.2 81.3 83.9 82.0 76.5 63.9 49.0 34.4 Mean: 22.5 26.6 37.3 49.3 60.6 69.9 73.1 70.9 63.6 51.8 39.6 26.2 Low: 14.2 17.9 27.0 37.5 49.0 58.5 62.3 59.8 50.8 39.6 30.3 18.1 CDD: 0 0 0 6 57 181 256 196 76 9 0 0 HDD: 1319 1076 857 475 193 35 5 13 117 419 761 1201 Number of Days T090: 0.0 0.0 0.0 0.0 1.0 4.1 4.8 3.0 1.5 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.0 0.0 0.0 0.0 0.0 T000: 4.4 2.5 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.4 T032: 29.2 25.6 22.4 8.3 0.6 0.0 0.0 0.0 0.2 6.1 17.3 28.8 ------------------------------------------------------------------------------------------ Annual Values High Temp: 59.9 F Mean Temp: 49.4 F Low Temp: 38.8 F Cooling DD: 781 Heating DD: 6471 Days above 90 (T090): 14.3 Days above 100 (T100): 0.2 Days below 0 (T000): 9.4 Days below 32 (T032): 138.6 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.53 1.60 2.79 3.47 4.44 3.93 4.00 3.50 3.05 2.98 3.28 2.20 Snow: 7.2 3.4 4.1 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.4 6.7 Number of Days P001: 6.3 5.5 8.2 10.2 10.1 9.0 8.1 7.8 6.8 7.7 7.9 7.7 P010: 4.3 3.5 6.3 7.6 8.1 6.9 6.5 6.0 4.8 5.3 6.2 5.2 P100: 0.4 0.2 0.6 0.7 1.2 1.4 1.2 1.0 0.9 0.8 0.6 0.4 S001: 2.9 2.0 1.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.6 S010: 2.3 1.7 0.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.2 2.2 S100: 0.1 0.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 36.77 inches Snowfall: 22.5 inches Days precipitation at or above 0 inches (P000): 95.3 Days precipitation at or above 0.10 inches (P010): 70.7 Days Precipitation at or above 1.00 inches (P100): 9.4 Days Snowfall at or above 0.1 inches (S001): 9.0 Days Snowfall at or above 1.0 inches (S010): 7.5 Days Snowfall at or above 10.0 inches (S100): 0.3 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ KEY: High - average daily high temperature, degrees F Mean - average daily mean temperature, degrees F Low - average daily low temperature, degrees F CDD - cooling degree days, base 50F HDD - heating degree days, base 50F T090 - number of Days with Temperatures above 90 degrees F T100 - number of Days with Temperatures above 100 degrees F T000 - number of Days with Temperatures below 0 degrees F T032 - number of Days with Temperatures below 32 degrees F Prcp - precipitation, inches Snow - snowfall, inches P001 - number of Days with Precipitation of 0.01 inches or more P010 - number of Days with Precipitation of 0.10 inches or more P100 - number of Days with Precipitation of 1.00 inches or more S001 - number of Days with Snowfall of 0.1 inches or more S010 - number of Days with Snowfall of 1.0 inches or more S100 - number of Days with Snowfall of 10.0 inches or more Page Source: Dr. Jim Angel, State Climatologist Illinois State Water Survey Prairie Research Institute University of Illinois Data Source: NOAA National Climatic Data Center