Belleville Siu Research Weather Station of the U.S. Weather Service

Located in Belleville in Saint Clair County, Illinois, Belleville Siu Research is at an elevation of 450 feet and was established as a weather station on 01 Jan 1965.

From 1971 to 2000, the following average readings were recorded:

 - - - - - - - - - JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR Average High....... 39.6 46.1 57.2 68.0 77.3 85.7 89.6 87.8 81.6 71.0 56.0 43.7 67.0 Average Low........ 22.1 26.7 35.5 44.6 53.9 62.5 66.5 63.7 56.0 45.0 36.1 26.5 44.9 Monthly Precipitn.. 2.02 2.20 3.54 3.91 4.18 3.97 3.51 3.34 2.98 2.87 3.88 2.97 39.37 Heating Degree Days 1059 801 579 277 104 6 0 5 39 246 568 928 4612 Cooling Degree Days 0 0 0 16 121 280 404 338 151 29 0 0 1339 

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