Official 1981-2010 Climate Normals City: SPARTA 1 W State: IL ID: 118147 Latitude: 38.1167 Longitude: -89.7167 Elevation: 535.0 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 39.9 45.0 55.8 66.9 75.7 84.5 88.1 87.4 80.3 69.5 56.0 42.6 Mean: 30.7 35.1 44.5 55.1 64.3 73.4 77.2 75.8 67.8 57.0 45.7 33.8 Low: 21.5 25.1 33.1 43.3 53.0 62.4 66.3 64.2 55.2 44.4 35.4 24.9 CDD: 0 0 3 22 89 264 379 338 147 26 2 0 HDD: 1063 839 640 319 109 11 0 3 64 276 581 969 Number of Days T090: 0.0 0.0 0.0 0.0 0.6 6.1 11.9 10.3 2.9 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.2 0.4 0.8 0.0 0.0 0.0 0.0 T000: 1.3 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 T032: 26.2 21.3 15.4 4.0 0.0 0.0 0.0 0.0 0.0 3.8 12.2 22.9 ------------------------------------------------------------------------------------------ Annual Values High Temp: 66.1 F Mean Temp: 55.1 F Low Temp: 44.2 F Cooling DD: 1269 Heating DD: 4873 Days above 90 (T090): 31.9 Days above 100 (T100): 1.3 Days below 0 (T000): 2.6 Days below 32 (T032): 105.8 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.65 2.62 4.00 4.19 5.31 4.27 4.13 3.06 3.16 3.82 4.34 3.34 Snow: 4.2 4.1 0.8 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.9 Number of Days P001: 7.3 7.3 10.4 10.1 10.7 8.8 8.1 7.1 6.9 7.9 9.0 8.5 P010: 4.7 5.0 7.0 7.1 7.6 6.6 5.8 5.0 4.6 5.6 6.7 5.8 P100: 0.7 0.6 1.2 1.0 1.6 1.3 1.1 0.7 0.9 0.9 1.5 0.7 S001: 2.8 2.5 0.9 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.9 S010: 1.2 1.3 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 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: 44.89 inches Snowfall: 12.5 inches Days precipitation at or above 0 inches (P000): 102.1 Days precipitation at or above 0.10 inches (P010): 71.5 Days Precipitation at or above 1.00 inches (P100): 12.2 Days Snowfall at or above 0.1 inches (S001): 8.5 Days Snowfall at or above 1.0 inches (S010): 3.9 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