Official 1981-2010 Climate Normals City: QUINCY RGNL AP State: IL ID: 093989 Latitude: 39.9369 Longitude: -91.1919 Elevation: 768.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 34.4 39.1 51.4 63.4 72.7 81.7 85.8 84.5 77.1 65.0 51.3 37.5 Mean: 26.5 30.9 41.9 53.2 62.8 72.1 76.1 74.4 66.4 54.7 42.5 29.8 Low: 18.5 22.6 32.4 43.0 52.9 62.4 66.3 64.4 55.6 44.4 33.7 22.1 CDD: 0 0 2 16 68 227 343 297 123 17 1 0 HDD: 1195 956 718 370 136 16 0 5 82 337 676 1091 Number of Days T090: 0.0 0.0 0.0 0.0 0.2 3.0 7.8 6.3 1.8 0.1 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.5 0.4 0.0 0.0 0.0 0.0 T000: 2.7 1.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 1.5 T032: 27.2 21.5 15.7 3.4 0.1 0.0 0.0 0.0 0.0 2.5 13.3 25.4 ------------------------------------------------------------------------------------------ Annual Values High Temp: 62.1 F Mean Temp: 52.7 F Low Temp: 43.3 F Cooling DD: 1095 Heating DD: 5582 Days above 90 (T090): 19.2 Days above 100 (T100): 0.9 Days below 0 (T000): 5.7 Days below 32 (T032): 109.1 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.52 1.88 2.46 3.69 4.54 3.99 4.04 3.63 3.30 3.01 3.02 2.25 Snow: 7.3 5.7 2.1 0.8 0.0 0.0 0.0 0.0 0.0 0.0 1.5 4.9 Number of Days P001: 7.6 7.7 10.1 11.1 12.2 10.1 9.2 9.0 7.9 8.7 9.2 8.5 P010: 3.4 3.4 5.9 7.1 7.7 6.6 6.2 5.5 5.2 5.7 5.4 4.1 P100: 0.3 0.6 0.4 0.8 1.4 1.0 1.2 0.9 0.9 0.8 0.7 0.6 S001: 4.9 3.8 1.9 0.5 0.0 0.0 0.0 0.0 0.0 0.1 1.6 3.6 S010: 2.2 2.0 0.7 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.4 1.7 S100: 0.0 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 37.33 inches Snowfall: 22.3 inches Days precipitation at or above 0 inches (P000): 111.3 Days precipitation at or above 0.10 inches (P010): 66.2 Days Precipitation at or above 1.00 inches (P100): 9.6 Days Snowfall at or above 0.1 inches (S001): 16.4 Days Snowfall at or above 1.0 inches (S010): 7.3 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