Official 1981-2010 Climate Normals City: AVON 5 NE State: IL ID: 110356 Latitude: 40.7086 Longitude: -90.3628 Elevation: 639.9 ft Temperature-Related Pseudonormals For stations with short records, linear combinations of normals from nearby sites were used to compute so-called pseudonormals. Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 31.6 35.9 49.0 62.9 73.1 81.6 84.7 83.6 77.0 64.8 50.1 36.3 Mean: 23.0 27.1 38.2 51.0 61.5 70.9 73.9 72.6 64.7 52.9 40.4 27.9 Low: 14.3 18.3 27.4 39.1 49.9 60.2 63.0 61.5 52.4 40.9 30.7 19.5 CDD: 0 0 0 6 44 188 275 240 64 5 0 0 HDD: 1303 1061 831 426 152 11 1 7 74 381 738 1150 Number of Days T090: 0.0 0.0 0.0 0.0 0.4 1.0 4.0 1.7 0.0 0.0 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T000: 4.6 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.7 T032: 28.5 25.6 19.6 6.7 0.0 0.0 0.0 0.0 0.0 4.7 17.5 29.0 ------------------------------------------------------------------------------------------ Annual Values High Temp: 61.0 F Mean Temp: 50.4 F Low Temp: 39.9 F Cooling DD: 822 Heating DD: 6134 Days above 90 (T090): 7.1 Days above 100 (T100): 0.0 Days below 0 (T000): 7.6 Days below 32 (T032): 131.5 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.64 1.54 2.61 3.63 4.34 4.20 4.38 3.64 3.52 2.89 2.71 1.98 Snow: 7.1 5.9 2.4 0.6 0.0 0.0 0.0 0.0 0.0 0.0 0.7 6.9 Number of Days P001: 6.2 5.3 7.1 8.9 10.1 8.2 8.4 8.0 6.8 7.2 7.0 6.5 P010: 3.9 3.4 5.3 6.9 7.5 6.6 6.6 5.9 5.4 5.3 5.5 4.4 P100: 0.4 0.3 0.4 0.9 1.3 1.5 1.1 1.1 1.1 0.6 0.6 0.4 S001: 3.6 3.1 1.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.5 3.1 S010: 3.0 2.1 1.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.5 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: 37.08 inches Snowfall: 23.6 inches Days precipitation at or above 0 inches (P000): 89.7 Days precipitation at or above 0.10 inches (P010): 66.7 Days Precipitation at or above 1.00 inches (P100): 9.7 Days Snowfall at or above 0.1 inches (S001): 11.7 Days Snowfall at or above 1.0 inches (S010): 9.2 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