Official 1981-2010 Climate Normals City: NEWTON State: IL ID: 116157 Latitude: 38.9917 Longitude: -88.1828 Elevation: 549.7 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 37.9 42.4 53.7 65.2 75.1 84.4 87.9 86.6 80.4 68.3 54.7 41.2 Mean: 29.3 33.8 43.4 54.6 63.9 73.7 77.0 75.2 68.0 56.3 44.7 33.0 Low: 20.7 25.2 33.2 43.9 52.8 63.0 66.1 63.9 55.6 44.3 34.6 24.7 CDD: 0 0 2 16 85 271 372 320 143 25 1 0 HDD: 1106 873 670 330 117 10 0 3 53 294 612 993 Number of Days T090: 0.0 0.0 0.0 0.0 0.9 6.1 11.2 8.8 2.9 0.3 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.3 0.1 0.0 0.0 0.0 T000: 2.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.5 T032: 25.3 21.0 14.5 3.2 0.2 0.0 0.0 0.0 0.1 3.4 12.5 23.8 ------------------------------------------------------------------------------------------ Annual Values High Temp: 64.9 F Mean Temp: 54.5 F Low Temp: 44.1 F Cooling DD: 1235 Heating DD: 5062 Days above 90 (T090): 30.1 Days above 100 (T100): 0.8 Days below 0 (T000): 2.9 Days below 32 (T032): 104.0 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.99 2.51 3.81 4.15 5.12 4.51 3.83 2.90 3.08 3.58 4.08 3.56 Snow: 6.4 2.9 2.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.4 4.4 Number of Days P001: 9.8 8.5 10.0 9.9 11.9 10.6 8.0 7.3 6.5 7.7 8.1 9.8 P010: 5.9 4.9 7.1 7.3 9.0 8.0 6.1 4.8 3.9 5.2 6.1 5.8 P100: 0.8 0.7 1.0 1.1 1.6 1.5 1.0 0.8 0.7 1.1 1.1 0.6 S001: 4.4 3.1 0.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.3 3.2 S010: 2.4 1.3 0.4 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 1.7 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: 44.12 inches Snowfall: 16.1 inches Days precipitation at or above 0 inches (P000): 108.1 Days precipitation at or above 0.10 inches (P010): 74.1 Days Precipitation at or above 1.00 inches (P100): 12.0 Days Snowfall at or above 0.1 inches (S001): 11.9 Days Snowfall at or above 1.0 inches (S010): 5.9 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