Official 1981-2010 Climate Normals City: MCLEANSBORO State: IL ID: 115515 Latitude: 38.0844 Longitude: -88.5425 Elevation: 445.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 40.0 45.2 55.7 66.4 76.0 85.0 88.6 88.3 81.7 69.8 56.7 43.4 Mean: 30.7 35.2 44.7 55.1 64.7 73.7 77.0 75.7 68.4 56.9 45.8 33.8 Low: 21.5 25.2 33.7 43.9 53.5 62.5 65.5 63.1 55.0 44.1 34.8 24.3 CDD: 0 0 3 21 92 272 374 334 155 27 2 0 HDD: 1062 834 633 316 100 9 1 2 54 276 580 965 Number of Days T090: 0.0 0.0 0.0 0.0 1.0 6.8 12.6 12.5 4.6 0.2 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.5 0.1 0.0 0.0 0.0 T000: 1.5 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 T032: 26.1 20.2 14.6 2.8 0.0 0.0 0.0 0.0 0.0 3.0 12.0 23.1 ------------------------------------------------------------------------------------------ Annual Values High Temp: 66.5 F Mean Temp: 55.3 F Low Temp: 44.0 F Cooling DD: 1280 Heating DD: 4833 Days above 90 (T090): 37.7 Days above 100 (T100): 1.0 Days below 0 (T000): 2.9 Days below 32 (T032): 101.7 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 3.06 2.89 4.50 4.40 5.38 4.01 3.59 3.02 3.10 3.61 4.39 3.93 Snow: 3.9 4.1 1.8 0.2 0.0 0.0 0.0 0.0 0.0 0.3 0.1 3.7 Number of Days P001: 9.4 9.3 12.1 12.2 12.1 10.2 8.5 8.2 7.9 9.4 11.0 11.2 P010: 5.4 6.0 7.5 8.0 8.1 6.3 5.4 5.2 5.1 5.7 6.9 7.0 P100: 0.7 0.5 0.9 0.9 1.2 1.0 1.0 0.7 0.9 0.7 1.0 1.0 S001: 3.1 2.1 1.3 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.1 2.3 S010: 1.3 1.3 0.6 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.0 1.1 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: 45.88 inches Snowfall: 14.1 inches Days precipitation at or above 0 inches (P000): 121.5 Days precipitation at or above 0.10 inches (P010): 76.6 Days Precipitation at or above 1.00 inches (P100): 10.5 Days Snowfall at or above 0.1 inches (S001): 9.1 Days Snowfall at or above 1.0 inches (S010): 4.5 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