CLIMATE CHARTS

Decatur Ap, Illinois

Latitude: 39.8344 Longitude: -88.8656

Elevation: 674.9 feet (205.7 meters)

Decatur Ap, Illinois Temperature Chart Daily average maximum and minimum temperatures for Decatur Ap, 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 Decatur Ap, Illinois Precipitation Chart Precipitation chart for Decatur Ap, 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 DECATUR AP, IL Daylight chart for DECATUR AP, IL. Latitude 39.8. 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 Decatur Ap, Illinois

Imperial Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °F 35.2 39.2 51.4 63.8 74.2 82.6 86.5 84.4 78.6 65.9 51.7 38.8
Minimum Temperature °F 19.4 22.9 31.8 41.8 51.4 61.6 65.0 62.7 54.3 43.0 34.1 22.9
Heating Degree Days °F 1168 950 727 379 141 17 1 5 67 345 663 1058
Cooling Degree Days °F 0 0 1 13 73 229 333 269 111 19 0 0
Precipitation in. 1.74 1.98 2.64 3.80 4.29 4.35 3.86 3.65 2.89 3.28 3.43 2.54

Metric Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °C 1.8 4.0 10.8 17.7 23.4 28.1 30.3 29.1 25.9 18.8 10.9 3.8
Minimum Temperature °C -7.0 -5.1 -0.1 5.4 10.8 16.4 18.3 17.1 12.4 6.1 1.2 -5.1
Heating Degree Days °C 649 528 404 211 78 9 1 3 37 192 368 588
Cooling Degree Days °C 0 0 1 7 41 127 185 149 62 11 0 0
Precipitation cm. 4.42 5.03 6.71 9.65 10.90 11.05 9.80 9.27 7.34 8.33 8.71 6.45
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