Official 1981-2010 Climate Normals City: HAVANA State: IL ID: 113940 Latitude: 40.3031 Longitude: -90.0656 Elevation: 439.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 34.4 39.5 51.8 64.5 74.9 84.7 88.6 87.0 80.3 68.0 52.9 38.1 Mean: 25.3 29.8 40.9 52.5 63.2 73.0 76.6 74.7 66.6 54.6 42.3 29.0 Low: 16.3 20.1 30.0 40.5 51.4 61.2 64.7 62.3 52.9 41.2 31.8 19.9 CDD: 0 0 1 15 78 255 362 303 129 18 1 0 HDD: 1229 985 749 390 135 17 1 4 81 340 680 1116 Number of Days T090: 0.0 0.0 0.0 0.2 1.3 7.7 12.6 9.8 4.0 0.2 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.2 0.9 0.8 0.0 0.0 0.0 0.0 T000: 3.4 2.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.5 T032: 28.6 24.6 18.6 5.3 0.2 0.0 0.0 0.0 0.2 5.8 15.4 26.9 ------------------------------------------------------------------------------------------ Annual Values High Temp: 63.8 F Mean Temp: 52.5 F Low Temp: 41.1 F Cooling DD: 1162 Heating DD: 5727 Days above 90 (T090): 35.8 Days above 100 (T100): 2.0 Days below 0 (T000): 8.1 Days below 32 (T032): 125.7 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.08 2.10 2.81 3.67 4.79 4.36 4.04 3.76 3.15 3.04 3.24 2.76 Snow: 8.2 7.1 3.1 0.9 0.0 0.0 0.0 0.0 0.0 0.0 0.8 7.9 Number of Days P001: 7.4 6.4 8.3 9.4 10.1 8.8 8.3 7.3 6.3 7.7 7.4 7.8 P010: 4.8 4.4 6.2 7.4 8.3 6.7 7.0 6.0 5.3 5.9 5.8 5.3 P100: 0.5 0.5 0.6 0.6 1.1 1.2 0.9 1.3 0.9 0.7 0.9 0.7 S001: 5.2 3.1 1.7 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.6 3.4 S010: 4.0 2.5 1.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.9 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: 39.80 inches Snowfall: 28.0 inches Days precipitation at or above 0 inches (P000): 95.2 Days precipitation at or above 0.10 inches (P010): 73.1 Days Precipitation at or above 1.00 inches (P100): 9.9 Days Snowfall at or above 0.1 inches (S001): 14.2 Days Snowfall at or above 1.0 inches (S010): 11.1 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