Official 1981-2010 Climate Normals City: CASEY State: IL ID: 111329 Latitude: 39.2975 Longitude: -87.9747 Elevation: 619.9 ft Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.78 2.51 3.22 4.37 4.63 4.42 4.15 3.46 2.92 3.71 4.01 3.22 Snow: 4.9 2.1 1.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 4.3 Number of Days P001: 8.1 7.6 9.2 11.2 11.9 10.2 8.4 7.2 6.7 8.4 8.5 9.2 P010: 5.2 4.7 6.4 7.6 8.5 7.3 6.2 5.2 4.5 5.4 6.3 6.4 P100: 0.7 0.7 0.6 1.1 1.3 1.3 1.3 1.1 0.8 1.0 0.8 0.8 S001: 3.3 1.7 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 2.2 S010: 2.4 1.2 0.7 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.4 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: 43.40 inches Snowfall: 12.9 inches Days precipitation at or above 0 inches (P000): 106.6 Days precipitation at or above 0.10 inches (P010): 73.7 Days Precipitation at or above 1.00 inches (P100): 11.5 Days Snowfall at or above 0.1 inches (S001): 8.1 Days Snowfall at or above 1.0 inches (S010): 5.8 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