Official 1981-2010 Climate Normals City: RANTOUL State: IL ID: 014806 Latitude: 40.3131 Longitude: -88.1594 Elevation: 740.0 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 33.6 38.5 50.3 63.4 74.3 84.1 86.7 85.1 79.3 66.2 51.8 37.7 Mean: 24.8 29.2 40.1 51.8 62.8 72.9 75.6 73.6 66.6 54.1 41.9 29.2 Low: 16.1 19.9 30.0 40.2 51.4 61.7 64.5 62.1 53.8 41.9 32.0 20.8 CDD: 0 0 2 14 81 256 330 274 124 16 0 0 HDD: 1244 1002 772 410 148 19 2 7 78 356 693 1108 Number of Days T090: 0.0 0.0 0.0 0.1 1.6 6.8 9.2 6.8 3.0 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.1 0.0 0.0 0.0 0.0 T000: 3.6 1.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.0 T032: 28.4 24.1 18.4 5.5 0.2 0.0 0.0 0.0 0.0 3.9 15.8 26.3 ------------------------------------------------------------------------------------------ Annual Values High Temp: 62.7 F Mean Temp: 52.0 F Low Temp: 41.3 F Cooling DD: 1096 Heating DD: 5838 Days above 90 (T090): 27.6 Days above 100 (T100): 0.6 Days below 0 (T000): 7.4 Days below 32 (T032): 122.5 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.07 2.01 2.98 3.84 4.36 3.94 4.59 4.05 3.09 3.32 3.47 2.59 Number of Days P001: 7.5 6.9 8.9 10.3 10.7 9.3 8.6 8.4 6.8 7.6 8.7 8.2 P010: 4.6 4.5 5.8 7.3 8.2 7.0 6.4 6.1 5.1 6.0 6.2 5.5 P100: 0.3 0.4 0.6 0.8 0.9 1.1 1.6 1.2 1.0 0.8 0.9 0.5 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 40.31 inches Days precipitation at or above 0 inches (P000): 101.9 Days precipitation at or above 0.10 inches (P010): 72.7 Days Precipitation at or above 1.00 inches (P100): 10.1 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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