Official 1981-2010 Climate Normals City: ROCHELLE State: IL ID: 117354 Latitude: 41.9117 Longitude: -89.0708 Elevation: 774.7 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 27.9 32.4 45.1 59.0 70.2 79.3 82.6 80.9 74.3 62.0 46.7 31.9 Mean: 19.6 24.1 35.6 47.9 58.9 68.8 71.9 70.2 62.5 50.4 37.9 24.1 Low: 11.4 15.8 26.1 36.8 47.6 58.2 61.2 59.6 50.6 38.8 29.1 16.3 CDD: 0 0 0 5 41 154 224 182 69 7 0 0 HDD: 1406 1145 912 518 230 42 10 20 145 459 813 1268 Number of Days T090: 0.0 0.0 0.0 0.0 0.4 2.1 3.6 2.5 0.6 0.0 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: 6.8 4.1 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.1 T032: 29.7 25.9 23.4 8.8 0.7 0.0 0.0 0.0 0.8 7.8 18.4 28.5 ------------------------------------------------------------------------------------------ Annual Values High Temp: 57.8 F Mean Temp: 47.8 F Low Temp: 37.7 F Cooling DD: 682 Heating DD: 6968 Days above 90 (T090): 9.2 Days above 100 (T100): 0.1 Days below 0 (T000): 15.1 Days below 32 (T032): 143.9 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.55 1.44 1.89 3.21 3.98 4.16 3.56 4.06 3.17 2.87 2.53 1.94 Snow: 8.3 3.8 2.8 0.5 0.0 0.0 0.0 0.0 0.0 0.0 0.7 6.2 Number of Days P001: 7.3 6.3 7.8 10.2 10.9 9.9 8.6 8.6 7.8 8.7 8.4 8.4 P010: 3.9 3.8 4.7 6.4 8.0 7.0 6.0 5.9 5.6 5.6 5.5 4.5 P100: 0.2 0.1 0.3 0.7 0.9 1.2 0.9 1.2 0.8 0.6 0.4 0.3 S001: 3.8 2.7 1.4 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.6 3.8 S010: 2.3 1.4 0.8 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.3 2.4 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: 34.36 inches Snowfall: 22.3 inches Days precipitation at or above 0 inches (P000): 102.9 Days precipitation at or above 0.10 inches (P010): 66.9 Days Precipitation at or above 1.00 inches (P100): 7.6 Days Snowfall at or above 0.1 inches (S001): 12.6 Days Snowfall at or above 1.0 inches (S010): 7.4 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