Official 1981-2010 Climate Normals City: VIRDEN State: IL ID: 118860 Latitude: 39.5061 Longitude: -89.7689 Elevation: 674.7 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 36.2 41.1 53.4 66.7 75.6 83.6 86.9 85.9 79.8 67.6 52.9 39.2 Mean: 28.6 33.1 43.9 55.8 65.1 73.7 77.0 75.5 68.6 57.1 44.5 31.9 Low: 21.1 25.2 34.3 44.9 54.7 63.7 67.0 65.1 57.3 46.6 36.1 24.6 CDD: 0 0 4 28 100 269 371 328 161 29 1 0 HDD: 1127 892 659 304 95 10 0 2 55 274 616 1026 Number of Days T090: 0.0 0.0 0.0 0.0 0.6 4.3 9.2 7.8 2.9 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.4 0.0 0.0 0.0 0.0 T000: 1.9 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.2 T032: 25.4 19.8 13.3 2.7 0.0 0.0 0.0 0.0 0.0 1.8 11.1 22.9 ------------------------------------------------------------------------------------------ Annual Values High Temp: 64.2 F Mean Temp: 54.7 F Low Temp: 45.1 F Cooling DD: 1291 Heating DD: 5061 Days above 90 (T090): 24.8 Days above 100 (T100): 0.6 Days below 0 (T000): 3.9 Days below 32 (T032): 96.9 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.92 2.07 2.80 3.55 4.29 3.95 3.61 2.92 3.10 3.14 3.50 2.65 Snow: 5.9 5.8 2.8 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.6 4.4 Number of Days P001: 5.8 6.2 8.1 9.0 9.4 8.2 6.9 7.0 5.8 7.5 7.6 6.8 P010: 4.0 4.6 6.3 6.4 7.1 6.1 5.4 5.0 4.4 5.6 6.0 4.6 P100: 0.4 0.4 0.3 0.9 1.1 1.1 1.1 0.9 0.9 0.8 1.2 0.6 S001: 2.4 2.2 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.0 S010: 2.0 2.0 0.9 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.7 S100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 37.50 inches Snowfall: 19.7 inches Days precipitation at or above 0 inches (P000): 88.3 Days precipitation at or above 0.10 inches (P010): 65.5 Days Precipitation at or above 1.00 inches (P100): 9.7 Days Snowfall at or above 0.1 inches (S001): 8.0 Days Snowfall at or above 1.0 inches (S010): 6.9 Days Snowfall at or above 10.0 inches (S100): 0.0 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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