CLIMATE CHARTS

Charleston, Illinois

Latitude: 39.4761 Longitude: -88.1653

Elevation: 649.9 feet (198.1 meters)

Charleston, Illinois Temperature Chart Daily average maximum and minimum temperatures for Charleston, Illinois Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec High & Low Temperature °F  °C -30 -34.4 -20 -28.9 -10 -23.3 0 -17.8 10 -12.2 20 -6.7 30 -1.1 40 4.4 50 10.0 60 15.6 70 21.1 80 26.7 90 32.2 100 37.8 110 43.3 Charleston, Illinois Precipitation Chart Precipitation chart for Charleston, Illinois Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Precipitation In. Cm. 0.00 0.00 0.10 0.25 0.20 0.51 0.30 0.76 0.40 1.02 0.50 1.27 0.60 1.52 0.70 1.78 0.80 2.03 0.90 2.29 1.00 2.54 Daylight Chart for CHARLESTON, IL Daylight chart for CHARLESTON, IL. Latitude 39.5. Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Sunrise/Sunset Daylight NOON NOON 0 0 2 2 4 4 6 6 8 8 10 10 12 12 14 2 16 4 18 6 20 8 22 10 24 12

Monthly Data Table for Charleston, Illinois

Imperial Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °F 36.4 41.7 53.2 65.7 75.0 83.8 86.4 85.0 79.1 67.1 53.3 39.7
Minimum Temperature °F 20.5 24.4 33.5 43.7 53.3 62.4 66.1 64.3 56.4 45.5 35.6 24.5
Heating Degree Days °F 1133 894 674 330 113 12 0 3 61 294 618 1020
Cooling Degree Days °F 0 0 3 21 87 255 349 302 144 24 1 0
Precipitation in. 2.49 2.51 2.89 4.29 4.62 4.35 4.47 2.93 3.24 3.76 3.97 3.15

Metric Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °C 2.4 5.4 11.8 18.7 23.9 28.8 30.2 29.4 26.2 19.5 11.8 4.3
Minimum Temperature °C -6.4 -4.2 0.8 6.5 11.8 16.9 18.9 17.9 13.6 7.5 2.0 -4.2
Heating Degree Days °C 629 497 374 183 63 7 0 2 34 163 343 567
Cooling Degree Days °C 0 0 2 12 48 142 194 168 80 13 1 0
Precipitation cm. 6.32 6.38 7.34 10.90 11.73 11.05 11.35 7.44 8.23 9.55 10.08 8.00
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