De Witt Illinois Climate Data

Monthly Average Climate Data for De Witt Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.2 °F33.6 °F2.25 in.
February20.5 °F38.2 °F1.98 in.
March29.5 °F49.9 °F2.69 in.
April40.5 °F63.5 °F3.9 in.
May52.2 °F73.9 °F4.45 in.
June61.4 °F82.6 °F4.49 in.
July64.5 °F85.3 °F4.15 in.
August62.2 °F83.8 °F3.44 in.
September54.6 °F78.8 °F3.29 in.
October42.7 °F65.8 °F3.39 in.
November31.9 °F50.9 °F2.93 in.
December23.0 °F38.4 °F2.41 in.
Annual41.7 °F62.1 °F39.37 in.

Climate Data for De Witt Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 6a : -10°F to -5°F
Plant Hardiness Zone - 2012Zone 5b : -15°F to -10°F
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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