Official 1981-2010 Climate Normals City: GALVA State: IL ID: 113335 Latitude: 41.1739 Longitude: -90.0350 Elevation: 809.8 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 30.1 35.2 48.1 61.7 72.4 81.6 84.6 82.7 76.0 63.6 48.4 34.0 Mean: 21.3 26.0 37.6 49.7 60.8 70.1 73.5 71.4 63.6 51.7 38.7 25.2 Low: 12.5 16.9 27.2 37.8 49.2 58.7 62.5 60.1 51.2 39.7 29.1 16.3 CDD: 0 0 1 9 53 182 271 212 81 9 0 0 HDD: 1355 1090 848 467 183 28 6 13 124 422 788 1235 Number of Days T090: 0.0 0.0 0.0 0.0 0.5 3.3 6.0 4.3 1.3 0.0 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.2 0.0 0.0 0.0 0.0 T000: 6.1 3.3 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 4.1 T032: 29.8 25.8 21.8 8.0 0.6 0.0 0.0 0.0 0.3 6.5 18.7 28.5 ------------------------------------------------------------------------------------------ Annual Values High Temp: 60.0 F Mean Temp: 49.3 F Low Temp: 38.5 F Cooling DD: 817 Heating DD: 6559 Days above 90 (T090): 15.4 Days above 100 (T100): 0.3 Days below 0 (T000): 13.7 Days below 32 (T032): 140.0 ------------------------------------------------------------------------------------------ Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.54 1.64 2.63 4.11 3.98 4.32 3.84 4.22 3.41 2.83 3.03 2.23 Snow: 7.0 5.2 2.4 0.7 0.0 0.0 0.0 0.0 0.0 0.0 1.3 4.0 Number of Days P001: 5.2 5.5 8.7 10.2 10.1 9.9 8.4 8.8 7.7 8.5 8.6 7.2 P010: 3.4 3.8 5.9 7.2 7.0 7.2 6.4 6.1 5.5 5.7 5.9 4.5 P100: 0.3 0.3 0.6 1.0 0.9 1.5 1.0 1.6 1.0 0.7 0.6 0.4 S001: 3.0 2.4 1.0 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.7 3.0 S010: 2.2 1.7 0.7 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.4 2.0 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: 37.78 inches Snowfall: 20.6 inches Days precipitation at or above 0 inches (P000): 98.8 Days precipitation at or above 0.10 inches (P010): 68.6 Days Precipitation at or above 1.00 inches (P100): 9.9 Days Snowfall at or above 0.1 inches (S001): 10.4 Days Snowfall at or above 1.0 inches (S010): 7.1 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