Official 1981-2010 Climate Normals City: HENNEPIN WTR TRMT State: IL ID: 114013 Latitude: 41.2647 Longitude: -89.3381 Elevation: 459.9 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 32.4 37.0 49.5 63.0 73.7 83.0 86.4 84.6 78.4 65.6 50.6 36.4 Mean: 23.0 27.4 38.7 50.8 61.4 70.9 74.6 72.8 65.1 53.0 40.4 27.2 Low: 13.7 17.8 28.0 38.5 49.1 58.8 62.7 60.9 51.9 40.3 30.2 18.1 CDD: 0 0 1 12 59 201 299 251 105 13 0 0 HDD: 1300 1053 815 440 170 25 3 10 101 386 739 1170 Number of Days T090: 0.0 0.0 0.0 0.1 1.0 5.6 9.0 6.7 2.6 0.2 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.2 0.5 0.4 0.0 0.0 0.0 0.0 T000: 5.2 2.9 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 2.9 T032: 29.0 25.2 21.2 7.1 0.5 0.0 0.0 0.0 0.3 6.4 17.4 27.5 ------------------------------------------------------------------------------------------ Annual Values High Temp: 61.8 F Mean Temp: 50.6 F Low Temp: 39.3 F Cooling DD: 942 Heating DD: 6212 Days above 90 (T090): 25.3 Days above 100 (T100): 1.1 Days below 0 (T000): 11.2 Days below 32 (T032): 134.6 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.74 1.71 2.55 3.02 3.93 3.87 4.02 4.18 3.36 2.97 3.04 1.79 Snow: 4.2 3.8 1.8 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.2 5.3 Number of Days P001: 4.8 4.5 6.8 8.8 10.3 10.3 8.5 9.0 8.0 7.9 7.0 5.4 P010: 2.8 3.3 4.4 6.2 6.4 6.8 6.3 6.0 5.5 5.2 4.9 3.7 P100: 0.4 0.2 0.5 0.8 0.9 0.9 1.3 1.4 0.9 0.5 0.8 0.6 S001: 2.4 2.2 1.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.3 S010: 1.4 1.4 0.6 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.1 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 0.1 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 36.18 inches Snowfall: 15.5 inches Days precipitation at or above 0 inches (P000): 91.3 Days precipitation at or above 0.10 inches (P010): 61.5 Days Precipitation at or above 1.00 inches (P100): 9.2 Days Snowfall at or above 0.1 inches (S001): 8.3 Days Snowfall at or above 1.0 inches (S010): 5.2 Days Snowfall at or above 10.0 inches (S100): 0.1 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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