Official 1981-2010 Climate Normals City: MATTOON COLES CO State: IL ID: 053802 Latitude: 39.4781 Longitude: -88.2803 Elevation: 720.9 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 34.8 39.7 52.2 63.6 73.4 82.0 85.7 84.9 78.3 65.6 51.6 38.4 Mean: 27.1 31.8 42.5 53.5 63.2 71.9 75.6 73.9 66.7 54.9 43.2 31.3 Low: 19.5 24.0 32.8 43.3 53.1 61.8 65.6 62.9 55.2 44.1 34.8 24.2 CDD: 0 0 1 13 74 223 330 279 118 19 0 0 HDD: 1173 928 699 359 128 17 1 4 66 333 655 1044 Number of Days T090: 0.0 0.0 0.0 0.0 0.2 2.5 6.4 5.5 1.2 0.0 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.0 0.0 0.0 0.0 0.0 T000: 2.3 0.3 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.6 T032: 26.4 22.2 15.7 3.5 0.2 0.1 0.0 0.0 0.0 3.0 12.6 23.8 ------------------------------------------------------------------------------------------ Annual Values High Temp: 62.6 F Mean Temp: 53.1 F Low Temp: 43.5 F Cooling DD: 1059 Heating DD: 5406 Days above 90 (T090): 15.8 Days above 100 (T100): 0.1 Days below 0 (T000): 3.2 Days below 32 (T032): 107.5 ------------------------------------------------------------------------------------------ Precipitation-Related Pseudonormals For stations with short records, linear combinations of normals from nearby sites were used to compute so-called pseudonormals. Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Prcp: 2.21 1.77 2.57 3.43 4.37 4.24 4.25 3.06 3.07 2.83 3.48 2.77 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 38.05 inches ------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------ 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