Official 1981-2010 Climate Normals City: PALESTINE State: IL ID: 116558 Latitude: 39.0028 Longitude: -87.6225 Elevation: 459.9 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 37.9 43.1 54.7 66.3 75.7 84.1 86.7 85.9 79.9 68.0 53.9 40.8 Mean: 30.3 34.4 44.7 55.1 65.0 73.7 76.4 75.0 67.4 56.4 44.8 33.3 Low: 22.7 25.8 34.7 43.9 54.3 63.4 66.1 64.0 54.9 44.8 35.7 25.7 CDD: 0 0 2 20 98 271 354 310 134 21 1 0 HDD: 1075 855 632 317 98 8 1 2 62 288 607 984 Number of Days T090: 0.0 0.0 0.0 0.1 0.9 5.2 8.3 7.7 2.9 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.0 0.0 0.0 0.0 T000: 1.6 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.0 T032: 24.0 20.6 13.6 3.0 0.0 0.0 0.0 0.0 0.2 3.4 11.8 22.0 ------------------------------------------------------------------------------------------ Annual Values High Temp: 64.8 F Mean Temp: 54.8 F Low Temp: 44.8 F Cooling DD: 1212 Heating DD: 4929 Days above 90 (T090): 25.1 Days above 100 (T100): 0.4 Days below 0 (T000): 3.1 Days below 32 (T032): 98.6 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 3.09 2.56 3.66 4.36 5.04 4.09 3.90 3.50 3.38 3.47 3.91 3.29 Snow: 4.1 3.2 1.2 0.1 0.0 0.0 0.0 0.0 0.0 0.1 0.4 4.3 Number of Days P001: 8.9 7.6 9.4 10.7 10.7 9.3 8.5 7.2 6.5 7.6 8.9 9.9 P010: 5.5 4.7 6.7 8.3 7.9 6.7 6.6 5.2 4.6 5.2 6.5 6.1 P100: 0.7 0.4 0.8 0.9 1.6 1.2 1.1 1.2 1.0 1.0 1.0 0.7 S001: 3.1 2.3 0.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.3 S010: 2.1 1.2 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.2 1.6 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: 44.25 inches Snowfall: 13.4 inches Days precipitation at or above 0 inches (P000): 105.2 Days precipitation at or above 0.10 inches (P010): 74.0 Days Precipitation at or above 1.00 inches (P100): 11.6 Days Snowfall at or above 0.1 inches (S001): 8.7 Days Snowfall at or above 1.0 inches (S010): 5.6 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