Official 1981-2010 Climate Normals City: LEBANON State: IL ID: 114991 Latitude: 38.6003 Longitude: -89.8178 Elevation: 497.9 ft Temperature-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 High: 39.4 44.4 55.4 67.0 76.1 85.0 88.4 87.5 80.5 69.2 55.9 42.1 Mean: 30.0 34.1 44.1 55.2 64.7 73.9 77.7 76.1 67.8 56.7 45.1 33.0 Low: 20.5 23.7 32.7 43.4 53.2 62.8 67.0 64.7 55.1 44.2 34.2 23.9 CDD: 0 0 3 19 92 274 394 346 133 26 1 0 HDD: 1086 866 652 313 103 8 0 2 49 283 600 992 Number of Days T090: 0.0 0.0 0.0 0.1 1.2 6.4 11.8 9.7 3.1 0.4 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.8 0.0 0.0 0.0 0.0 T000: 0.9 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7 T032: 26.5 23.4 17.0 2.4 0.0 0.0 0.0 0.0 0.0 2.5 13.7 23.6 ------------------------------------------------------------------------------------------ Annual Values High Temp: 66.0 F Mean Temp: 54.9 F Low Temp: 43.9 F Cooling DD: 1287 Heating DD: 4953 Days above 90 (T090): 32.8 Days above 100 (T100): 1.3 Days below 0 (T000): 1.5 Days below 32 (T032): 109.2 ------------------------------------------------------------------------------------------ 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: 2.56 2.68 3.57 4.06 4.70 4.01 4.26 3.55 3.58 3.71 4.53 3.07 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 44.28 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