Official 1981-2010 Climate Normals City: CONGERVILLE 2NW State: IL ID: 111836 Latitude: 40.6211 Longitude: -89.2414 Elevation: 634.7 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 32.8 38.2 50.5 63.6 73.6 82.7 85.8 84.2 79.0 66.7 51.3 37.0 Mean: 23.7 28.7 39.5 51.6 61.5 70.8 74.3 72.1 65.2 53.6 41.5 27.6 Low: 14.6 19.3 28.6 39.6 49.5 58.9 62.9 60.1 51.4 40.5 31.6 18.3 CDD: 0 0 1 13 64 199 292 230 96 18 0 0 HDD: 1280 1015 790 415 171 26 2 9 90 371 707 1157 Number of Days T090: 0.0 0.0 0.0 0.0 1.3 5.0 7.0 4.3 2.2 0.3 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 T000: 4.6 1.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.1 T032: 28.8 25.1 21.1 6.8 0.6 0.0 0.0 0.0 0.1 6.4 16.3 27.2 ------------------------------------------------------------------------------------------ Annual Values High Temp: 62.2 F Mean Temp: 51.0 F Low Temp: 39.7 F Cooling DD: 913 Heating DD: 6033 Days above 90 (T090): 20.3 Days above 100 (T100): 0.1 Days below 0 (T000): 8.2 Days below 32 (T032): 132.6 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.87 1.71 2.46 3.49 4.65 3.93 3.98 4.07 3.19 3.08 3.24 2.17 Snow: 7.3 4.2 2.7 0.6 0.0 0.0 0.0 0.0 0.0 0.0 1.1 5.8 Number of Days P001: 8.3 6.7 8.9 11.0 11.3 10.6 8.9 8.7 6.6 9.2 8.3 8.1 P010: 4.6 3.9 5.5 6.8 8.1 6.8 6.5 6.2 4.8 6.2 5.8 4.8 P100: 0.6 0.4 0.4 0.7 1.2 0.9 1.1 1.2 0.7 0.5 0.5 0.3 S001: 4.7 3.5 1.4 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.6 3.4 S010: 2.3 1.5 0.9 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 1.9 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: 37.84 inches Snowfall: 21.7 inches Days precipitation at or above 0 inches (P000): 106.6 Days precipitation at or above 0.10 inches (P010): 70.0 Days Precipitation at or above 1.00 inches (P100): 8.5 Days Snowfall at or above 0.1 inches (S001): 13.8 Days Snowfall at or above 1.0 inches (S010): 7.0 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