Official 1981-2010 Climate Normals City: ROSICLARE 5NW State: IL ID: 117487 Latitude: 37.4747 Longitude: -88.4122 Elevation: 399.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 42.3 47.5 57.9 68.7 76.2 84.0 87.6 87.8 81.2 70.4 58.0 45.3 Mean: 32.4 36.3 45.9 56.0 64.4 73.0 76.6 75.7 68.3 56.9 46.7 35.4 Low: 22.4 25.2 33.8 43.4 52.6 62.1 65.6 63.6 55.5 43.4 35.3 25.5 CDD: 0 0 4 24 86 251 360 333 153 24 3 0 HDD: 1012 802 598 293 104 9 1 2 52 275 553 917 Number of Days T090: 0.0 0.0 0.0 0.0 0.2 4.3 10.8 10.9 3.7 0.0 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.3 0.1 0.0 0.0 0.0 T000: 1.3 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 T032: 24.8 20.9 14.7 4.2 0.4 0.0 0.0 0.0 0.0 4.2 11.7 22.8 ------------------------------------------------------------------------------------------ Annual Values High Temp: 67.3 F Mean Temp: 55.7 F Low Temp: 44.1 F Cooling DD: 1238 Heating DD: 4619 Days above 90 (T090): 30.0 Days above 100 (T100): 0.5 Days below 0 (T000): 2.3 Days below 32 (T032): 103.6 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 3.63 3.78 4.56 4.63 5.57 4.28 4.25 3.29 3.35 3.77 4.31 4.44 Snow: 3.2 2.9 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.2 0.0 1.4 Number of Days P001: 8.1 8.1 10.4 10.1 10.5 8.7 8.3 6.4 6.4 7.3 9.0 9.4 P010: 6.2 6.2 7.7 7.2 8.2 6.5 6.1 4.6 4.8 5.4 6.8 7.1 P100: 1.1 1.1 1.3 1.2 1.7 1.3 1.4 0.9 1.3 1.1 1.2 1.2 S001: 1.2 0.8 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.7 S010: 0.7 0.7 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 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: 49.86 inches Snowfall: 8.0 inches Days precipitation at or above 0 inches (P000): 102.7 Days precipitation at or above 0.10 inches (P010): 76.8 Days Precipitation at or above 1.00 inches (P100): 14.8 Days Snowfall at or above 0.1 inches (S001): 3.0 Days Snowfall at or above 1.0 inches (S010): 2.1 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