Official 1981-2010 Climate Normals City: JERSEYVILLE 2 SW State: IL ID: 114489 Latitude: 39.1053 Longitude: -90.3419 Elevation: 629.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 36.7 41.9 52.9 65.2 74.6 83.2 87.1 86.1 79.1 67.4 53.8 40.1 Mean: 27.9 32.4 42.6 53.8 63.7 72.6 76.4 74.6 66.7 55.1 43.9 31.3 Low: 19.0 22.9 32.3 42.3 52.8 62.0 65.7 63.1 54.2 42.9 34.0 22.4 CDD: 0 0 3 19 81 243 354 302 126 18 1 0 HDD: 1152 913 697 356 121 15 1 5 77 324 634 1046 Number of Days T090: 0.0 0.0 0.0 0.1 0.6 4.4 9.3 8.6 2.4 0.0 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.3 0.0 0.0 0.0 0.0 T000: 2.2 1.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.3 T032: 27.1 22.3 16.1 4.2 0.1 0.0 0.0 0.0 0.1 4.0 13.2 25.3 ------------------------------------------------------------------------------------------ Annual Values High Temp: 64.1 F Mean Temp: 53.5 F Low Temp: 42.9 F Cooling DD: 1147 Heating DD: 5340 Days above 90 (T090): 25.4 Days above 100 (T100): 0.5 Days below 0 (T000): 4.6 Days below 32 (T032): 112.4 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.17 2.25 3.24 3.88 4.61 3.84 3.62 3.17 3.41 3.21 4.08 3.12 Snow: 3.9 3.4 1.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.6 3.6 Number of Days P001: 7.0 6.9 9.6 10.9 11.3 9.2 8.0 7.0 7.3 8.9 8.9 8.3 P010: 4.2 4.5 6.7 6.9 7.5 6.5 5.9 5.4 5.0 6.1 6.6 5.2 P100: 0.5 0.5 0.7 0.8 1.4 1.0 1.1 0.8 1.0 0.8 1.3 0.8 S001: 2.1 1.7 0.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 1.8 S010: 1.6 1.2 0.5 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.0 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: 40.60 inches Snowfall: 13.2 inches Days precipitation at or above 0 inches (P000): 103.3 Days precipitation at or above 0.10 inches (P010): 70.5 Days Precipitation at or above 1.00 inches (P100): 10.7 Days Snowfall at or above 0.1 inches (S001): 6.6 Days Snowfall at or above 1.0 inches (S010): 4.6 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