Official 1981-2010 Climate Normals City: WALTONVILLE State: IL ID: 118932 Latitude: 38.2133 Longitude: -89.0850 Elevation: 511.0 ft Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.69 2.81 3.97 4.27 5.02 4.03 4.03 2.89 3.07 3.75 4.43 3.43 Snow: 2.9 2.2 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 2.8 Number of Days P001: 6.5 6.2 8.5 8.9 9.5 7.9 6.8 6.5 5.4 7.0 7.7 8.0 P010: 4.9 5.0 6.7 7.3 7.4 6.5 5.6 5.1 4.4 6.0 6.7 6.5 P100: 0.5 0.6 0.8 1.1 1.4 1.3 1.2 0.9 1.0 1.0 1.4 0.8 S001: 1.5 1.2 0.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.0 S010: 0.8 0.9 0.1 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.9 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: 44.39 inches Snowfall: 8.6 inches Days precipitation at or above 0 inches (P000): 88.9 Days precipitation at or above 0.10 inches (P010): 72.1 Days Precipitation at or above 1.00 inches (P100): 12.0 Days Snowfall at or above 0.1 inches (S001): 4.1 Days Snowfall at or above 1.0 inches (S010): 2.8 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