CLIMATE CHARTS

Sullivan, Illinois

Latitude: 39.5608 Longitude: -88.6067

Elevation: 659.1 feet (200.9 meters)

Sullivan, Illinois Temperature Chart Daily average maximum and minimum temperatures for Sullivan, 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 Sullivan, Illinois Precipitation Chart Precipitation chart for Sullivan, 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 SULLIVAN, IL Daylight chart for SULLIVAN, IL. Latitude 39.6. 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 Sullivan, Illinois

Imperial Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °F 34.5 39.0 50.2 63.4 72.7 82.5 85.2 84.7 77.3 66.0 51.3 38.5
Minimum Temperature °F 17.9 20.9 30.6 40.4 51.5 61.3 64.8 61.1 52.5 42.4 32.4 22.5
Heating Degree Days °F 1203 981 763 403 156 15 2 7 89 353 695 1069
Cooling Degree Days °F 0 0 1 10 66 222 311 252 86 18 1 0
Precipitation in. 2.38 2.18 2.59 3.67 4.50 4.44 4.34 3.06 2.61 3.25 3.60 3.15

Metric Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °C 1.4 3.9 10.1 17.4 22.6 28.1 29.6 29.3 25.2 18.9 10.7 3.6
Minimum Temperature °C -7.8 -6.2 -0.8 4.7 10.8 16.3 18.2 16.2 11.4 5.8 0.2 -5.3
Heating Degree Days °C 668 545 424 224 87 8 1 4 49 196 386 594
Cooling Degree Days °C 0 0 1 6 37 123 173 140 48 10 1 0
Precipitation cm. 6.05 5.54 6.58 9.32 11.43 11.28 11.02 7.77 6.63 8.26 9.14 8.00
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