Official 1981-2010 Climate Normals City: LAWRENCEVILLE INTL AP State: IL ID: 013809 Latitude: 38.7642 Longitude: -87.6056 Elevation: 429.0 ft Temperature-Related Normals Normal Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High: 39.2 44.2 55.3 66.7 76.6 85.2 88.3 87.5 81.9 69.5 55.8 42.3 Mean: 31.1 35.5 45.0 56.0 66.0 74.5 77.8 76.4 69.5 57.7 46.3 34.6 Low: 22.9 26.9 34.7 45.3 55.4 63.7 67.4 65.4 57.0 45.9 36.9 27.0 CDD: 0 0 2 24 113 290 398 356 171 32 1 0 HDD: 1052 824 622 294 82 7 0 1 38 258 561 941 Number of Days T090: 0.0 0.0 0.0 0.0 2.0 8.6 12.4 10.1 3.7 0.3 0.0 0.0 T100: 0.0 0.0 0.0 0.0 0.0 0.0 0.1 0.4 0.0 0.0 0.0 0.0 T000: 1.4 0.1 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.7 T032: 23.8 20.5 12.4 2.1 0.0 0.0 0.0 0.0 0.0 1.4 9.4 20.2 ------------------------------------------------------------------------------------------ Annual Values High Temp: 66.1 F Mean Temp: 56.0 F Low Temp: 45.8 F Cooling DD: 1387 Heating DD: 4680 Days above 90 (T090): 37.1 Days above 100 (T100): 0.4 Days below 0 (T000): 2.2 Days below 32 (T032): 89.8 ------------------------------------------------------------------------------------------ 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: 2.38 2.01 3.43 4.16 5.58 3.98 4.42 3.39 3.19 3.98 3.97 3.39 ------------------------------------------------------------------------------------------ Annual Values Precipitation: 43.88 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