Official 1981-2010 Climate Normals City: GRAND TWR 2 State: IL ID: 113595 Latitude: 37.6592 Longitude: -89.5103 Elevation: 382.8 ft Precipitation-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.70 2.93 4.17 4.10 4.97 4.15 3.55 2.94 2.94 3.62 4.37 3.84 Snow: 2.1 2.2 0.8 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.1 1.5 Number of Days P001: 6.4 6.9 8.6 8.0 8.6 7.3 6.0 5.3 5.6 6.4 7.6 7.2 P010: 4.7 5.1 6.4 6.4 7.2 6.0 5.0 4.3 4.5 5.3 6.1 5.8 P100: 0.6 0.8 1.1 1.3 1.6 1.3 1.0 1.0 0.8 1.0 1.4 0.9 S001: 1.2 1.5 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.8 S010: 0.8 1.0 0.2 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.6 S100: 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 44.28 inches Snowfall: 6.8 inches Days precipitation at or above 0 inches (P000): 83.9 Days precipitation at or above 0.10 inches (P010): 66.8 Days Precipitation at or above 1.00 inches (P100): 12.8 Days Snowfall at or above 0.1 inches (S001): 3.9 Days Snowfall at or above 1.0 inches (S010): 2.6 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