Official 1981-2010 Climate Normals City: MACOMB State: IL ID: 115280 Latitude: 40.4792 Longitude: -90.6692 Elevation: 609.8 ft Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 1.60 1.76 2.69 3.69 4.34 4.49 4.13 3.51 3.60 3.31 2.79 2.26 Number of Days P001: 6.8 6.3 8.7 10.1 11.2 10.0 9.0 8.2 7.5 7.7 8.7 7.5 P010: 4.0 3.3 5.6 6.8 7.5 6.4 5.9 5.5 5.3 4.8 5.7 4.3 P100: 0.4 0.3 0.4 1.1 1.2 1.4 1.3 1.0 1.1 0.6 0.5 0.4 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 38.17 inches Days precipitation at or above 0 inches (P000): 101.7 Days precipitation at or above 0.10 inches (P010): 65.1 Days Precipitation at or above 1.00 inches (P100): 9.7 ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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