Wellington Illinois Climate Data

Monthly Average Climate Data for Wellington Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.4 °F33.0 °F2.18 in.
February20.3 °F37.7 °F1.84 in.
March29.7 °F49.4 °F2.73 in.
April40.1 °F63.1 °F4.02 in.
May51.7 °F73.8 °F4.47 in.
June61.0 °F82.2 °F4.84 in.
July63.9 °F84.7 °F4.44 in.
August61.6 °F83.2 °F3.38 in.
September53.9 °F78.6 °F2.99 in.
October42.8 °F65.9 °F3.35 in.
November32.3 °F50.6 °F2.82 in.
December22.9 °F38.0 °F2.29 in.
Annual41.5 °F61.7 °F39.35 in.

Climate Data for Wellington 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 ConditionsModerate Drought
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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