Official 1981-2010 Climate Normals City: ANNA 2 NNE State: IL ID: 110187 Latitude: 37.4814 Longitude: -89.2344 Elevation: 639.9 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 43.7 49.2 59.6 70.2 77.9 85.9 88.8 88.8 81.8 71.2 58.5 45.8 Mean: 33.4 38.0 47.2 57.1 65.6 74.0 77.5 76.7 69.1 58.2 47.2 35.9 Low: 23.0 26.7 34.8 44.1 53.3 62.0 66.2 64.5 56.3 45.2 35.9 26.1 CDD: 0 0 3 27 101 275 388 362 164 29 2 0 HDD: 981 757 555 262 83 6 0 1 43 240 536 900 Number of Days T090: 0.0 0.0 0.0 0.0 0.6 7.3 13.4 12.9 3.6 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.7 0.0 0.0 0.0 0.0 T000: 0.9 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7 T032: 25.1 19.5 13.2 3.7 0.1 0.0 0.0 0.0 0.1 2.4 11.6 21.6 ------------------------------------------------------------------------------------------ Annual Values High Temp: 68.5 F Mean Temp: 56.7 F Low Temp: 44.9 F Cooling DD: 1352 Heating DD: 4366 Days above 90 (T090): 37.9 Days above 100 (T100): 0.9 Days below 0 (T000): 1.9 Days below 32 (T032): 97.3 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 3.71 3.50 4.63 4.67 6.01 4.40 3.32 3.23 3.33 4.22 4.85 4.51 Snow: 3.5 4.2 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.1 2.5 Number of Days P001: 8.2 8.4 9.7 10.3 11.0 9.2 7.8 7.1 6.8 8.5 9.8 10.1 P010: 5.9 5.8 7.3 7.5 8.5 6.3 5.7 4.7 5.2 6.7 6.8 6.9 P100: 0.8 0.9 1.2 1.2 1.9 1.2 1.0 1.0 1.0 1.1 1.4 1.1 S001: 2.4 2.1 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 1.6 S010: 1.4 1.3 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.9 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: 50.38 inches Snowfall: 11.5 inches Days precipitation at or above 0 inches (P000): 106.9 Days precipitation at or above 0.10 inches (P010): 77.3 Days Precipitation at or above 1.00 inches (P100): 13.8 Days Snowfall at or above 0.1 inches (S001): 7.2 Days Snowfall at or above 1.0 inches (S010): 4.0 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