Official 1981-2010 Climate Normals City: CLINTON 1SSW State: IL ID: 111743 Latitude: 40.1375 Longitude: -88.9675 Elevation: 700.0 ft Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.06 2.17 2.95 3.98 4.51 4.27 4.58 3.60 2.76 3.45 3.68 2.89 Number of Days P001: 9.0 8.1 10.9 11.9 12.0 10.2 9.5 8.5 7.9 9.9 10.4 10.0 P010: 5.0 4.4 6.4 8.0 7.9 7.4 6.7 5.7 4.6 6.1 6.8 5.7 P100: 0.3 0.4 0.5 0.7 1.2 1.1 1.4 1.1 0.7 1.0 0.9 0.7 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 40.90 inches Days precipitation at or above 0 inches (P000): 118.3 Days precipitation at or above 0.10 inches (P010): 74.7 Days Precipitation at or above 1.00 inches (P100): 10.0 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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