Official 1981-2010 Climate Normals City: NASHVILLE 1 E State: IL ID: 116011 Latitude: 38.3431 Longitude: -89.3586 Elevation: 513.0 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 38.2 43.0 54.1 65.5 74.7 83.7 86.9 86.1 79.0 68.1 54.3 41.4 Mean: 29.9 34.0 44.5 55.5 65.1 74.0 77.3 76.0 68.4 57.5 45.1 33.5 Low: 21.7 25.0 34.9 45.6 55.4 64.3 67.7 65.8 57.7 47.0 35.8 25.5 CDD: 0 0 2 19 96 277 382 341 153 30 1 0 HDD: 1086 868 637 303 95 8 1 2 52 261 600 978 Number of Days T090: 0.0 0.0 0.0 0.0 0.3 4.3 8.6 7.4 1.8 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.0 0.0 0.0 0.0 T000: 1.2 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.8 T032: 25.8 21.3 12.2 2.3 0.0 0.0 0.0 0.0 0.0 1.8 11.1 22.8 ------------------------------------------------------------------------------------------ Annual Values High Temp: 64.7 F Mean Temp: 55.2 F Low Temp: 45.6 F Cooling DD: 1302 Heating DD: 4890 Days above 90 (T090): 22.5 Days above 100 (T100): 0.5 Days below 0 (T000): 2.6 Days below 32 (T032): 97.2 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.31 2.27 3.33 3.68 4.77 3.91 3.93 2.64 3.27 3.44 3.70 2.87 Snow: 4.2 4.3 0.9 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.3 3.4 Number of Days P001: 7.4 7.3 9.8 9.8 10.6 9.0 7.9 7.1 6.7 8.2 8.9 8.6 P010: 4.4 4.6 6.5 6.9 7.5 6.4 5.5 4.7 4.5 5.8 6.4 5.6 P100: 0.5 0.4 0.9 0.9 1.3 1.0 1.4 0.6 1.0 0.9 0.9 0.6 S001: 2.7 2.6 0.8 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.2 2.0 S010: 1.3 1.4 0.2 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.2 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: 40.12 inches Snowfall: 13.3 inches Days precipitation at or above 0 inches (P000): 101.3 Days precipitation at or above 0.10 inches (P010): 68.8 Days Precipitation at or above 1.00 inches (P100): 10.4 Days Snowfall at or above 0.1 inches (S001): 8.5 Days Snowfall at or above 1.0 inches (S010): 4.3 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