Official 1981-2010 Climate Normals City: POLO 5 NW State: IL ID: 116897 Latitude: 42.0347 Longitude: -89.6119 Elevation: 855.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 30.5 35.1 48.2 62.0 72.9 82.4 84.7 82.9 76.7 64.1 48.4 33.9 Mean: 21.7 25.8 37.5 49.7 60.4 70.1 73.1 70.9 63.7 51.6 38.7 25.5 Low: 12.9 16.5 26.8 37.4 47.9 57.8 61.6 59.0 50.7 39.2 28.9 17.1 CDD: 0 0 0 5 49 181 256 196 74 10 0 0 HDD: 1342 1097 853 464 191 29 3 11 113 424 791 1224 Number of Days T090: 0.0 0.0 0.0 0.0 0.9 4.6 4.7 2.8 0.9 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T000: 6.0 2.8 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 3.4 T032: 29.6 26.0 22.3 8.7 1.1 0.0 0.0 0.0 0.4 7.2 18.2 27.7 ------------------------------------------------------------------------------------------ Annual Values High Temp: 60.3 F Mean Temp: 49.2 F Low Temp: 38.1 F Cooling DD: 771 Heating DD: 6543 Days above 90 (T090): 13.9 Days above 100 (T100): 0.0 Days below 0 (T000): 12.5 Days below 32 (T032): 141.2 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.73 1.75 2.81 3.51 4.24 4.70 4.29 4.47 3.26 3.11 2.98 2.41 Number of Days P001: 10.6 8.4 10.6 11.1 12.6 11.4 10.1 10.1 8.4 9.3 9.7 10.8 P010: 5.4 5.0 5.8 7.7 7.3 7.5 6.8 6.1 5.3 5.5 4.9 5.8 P100: 0.2 0.3 0.7 0.7 1.4 1.5 1.2 1.4 0.9 0.8 0.3 0.3 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 39.26 inches Days precipitation at or above 0 inches (P000): 123.1 Days precipitation at or above 0.10 inches (P010): 73.1 Days Precipitation at or above 1.00 inches (P100): 9.7 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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