Official 1981-2010 Climate Normals City: DANVILLE State: IL ID: 112140 Latitude: 40.1392 Longitude: -87.6481 Elevation: 557.9 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 35.1 40.0 51.9 64.8 74.7 83.3 85.4 83.8 78.3 66.1 52.2 38.3 Mean: 27.1 31.4 42.0 53.5 63.1 72.1 75.1 73.5 66.7 55.0 43.4 30.8 Low: 19.2 22.9 32.0 42.1 51.5 60.9 64.7 63.1 55.1 43.8 34.5 23.3 CDD: 0 0 2 16 74 229 312 267 123 18 1 0 HDD: 1173 939 716 363 133 16 1 5 72 329 650 1060 Number of Days T090: 0.0 0.0 0.0 0.0 0.7 4.1 5.8 3.9 1.3 0.0 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.1 0.1 0.0 0.0 0.0 0.0 T000: 2.9 1.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 T032: 26.1 21.9 16.2 4.8 0.2 0.0 0.0 0.0 0.0 3.3 13.3 23.7 ------------------------------------------------------------------------------------------ Annual Values High Temp: 62.9 F Mean Temp: 52.9 F Low Temp: 42.8 F Cooling DD: 1041 Heating DD: 5458 Days above 90 (T090): 15.9 Days above 100 (T100): 0.2 Days below 0 (T000): 5.5 Days below 32 (T032): 109.6 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.21 2.21 3.02 3.98 4.74 4.55 4.67 3.48 2.93 3.57 3.83 2.83 Snow: 4.8 4.9 2.7 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 5.2 Number of Days P001: 9.8 8.3 10.6 12.0 12.4 10.9 9.9 9.0 8.2 9.2 10.3 11.2 P010: 4.9 4.8 6.4 8.0 8.5 7.4 7.4 5.7 4.9 6.3 6.9 6.6 P100: 0.5 0.5 0.6 0.7 1.2 1.3 1.4 1.0 0.8 0.9 1.1 0.4 S001: 3.6 2.4 1.1 0.2 0.0 0.0 0.0 0.0 0.0 0.1 0.4 3.0 S010: 1.6 1.6 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 1.8 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: 42.02 inches Snowfall: 17.9 inches Days precipitation at or above 0 inches (P000): 121.8 Days precipitation at or above 0.10 inches (P010): 77.8 Days Precipitation at or above 1.00 inches (P100): 10.4 Days Snowfall at or above 0.1 inches (S001): 10.8 Days Snowfall at or above 1.0 inches (S010): 5.8 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