Official 1981-2010 Climate Normals City: MONMOUTH 4NW State: IL ID: 115772 Latitude: 40.9361 Longitude: -90.7197 Elevation: 723.9 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 30.7 35.8 48.3 61.5 72.2 81.4 84.6 83.5 76.8 64.4 49.5 34.1 Mean: 22.2 26.8 38.4 50.2 61.3 70.6 73.6 72.3 64.5 52.5 39.9 25.9 Low: 13.7 17.8 28.6 38.8 50.4 59.8 62.6 61.2 52.3 40.6 30.3 17.8 CDD: 0 0 0 7 60 191 270 236 89 12 0 0 HDD: 1327 1069 823 453 175 23 4 8 103 400 753 1210 Number of Days T090: 0.0 0.0 0.0 0.1 0.7 2.4 5.7 4.1 1.1 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 T000: 5.7 2.2 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 2.5 T032: 29.5 24.8 19.4 6.6 0.1 0.0 0.0 0.0 0.2 5.1 17.3 28.8 ------------------------------------------------------------------------------------------ Annual Values High Temp: 60.3 F Mean Temp: 50.0 F Low Temp: 39.6 F Cooling DD: 866 Heating DD: 6348 Days above 90 (T090): 14.3 Days above 100 (T100): 0.0 Days below 0 (T000): 10.5 Days below 32 (T032): 131.7 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.52 1.54 2.53 3.88 4.77 4.49 4.11 4.74 3.74 2.80 2.28 2.12 Number of Days P001: 7.6 7.0 8.0 11.3 13.2 12.5 8.5 10.2 7.5 9.1 6.8 7.9 P010: 3.6 3.3 5.1 8.3 8.3 8.1 4.9 6.1 5.0 5.7 3.5 4.4 P100: 0.4 0.3 0.5 1.0 2.1 1.8 0.7 1.3 1.1 0.7 0.2 0.3 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 38.52 inches Days precipitation at or above 0 inches (P000): 109.6 Days precipitation at or above 0.10 inches (P010): 66.3 Days Precipitation at or above 1.00 inches (P100): 10.4 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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