CLIMATE CHARTS

Olney, Illinois

Latitude: 38.7003 Longitude: -88.0817

Elevation: 480 feet (146.3 meters)

Olney, Illinois Temperature Chart Daily average maximum and minimum temperatures for Olney, 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 Olney, Illinois Precipitation Chart Precipitation chart for Olney, 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 OLNEY, IL Daylight chart for OLNEY, IL. Latitude 38.7. 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 Olney, Illinois

Imperial Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °F 37.8 42.7 53.7 65.6 75.0 84.3 87.2 86.5 80.3 68.3 54.7 41.2
Minimum Temperature °F 20.4 23.6 32.2 42.7 52.6 62.5 65.6 63.9 55.4 44.0 34.4 24.2
Heating Degree Days °F 1113 892 685 342 119 10 0 2 59 298 615 1001
Cooling Degree Days °F 0 0 2 17 82 262 354 318 145 24 1 0
Precipitation in. 3.05 2.73 4.34 4.33 5.83 4.19 4.33 3.20 3.07 3.99 4.48 3.88

Metric Units
Statistic Units Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Maximum Temperature °C 3.2 5.9 12.1 18.7 23.9 29.1 30.7 30.3 26.8 20.2 12.6 5.1
Minimum Temperature °C -6.4 -4.7 0.1 5.9 11.4 16.9 18.7 17.7 13.0 6.7 1.3 -4.3
Heating Degree Days °C 618 496 381 190 66 6 0 1 33 166 342 556
Cooling Degree Days °C 0 0 1 9 46 146 197 177 81 13 1 0
Precipitation cm. 7.75 6.93 11.02 11.00 14.81 10.64 11.00 8.13 7.80 10.13 11.38 9.86
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