South Wilmington Illinois Climate Data

Monthly Average Climate Data for South Wilmington Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January15.8 °F31.6 °F2.05 in.
February18.8 °F35.8 °F1.8 in.
March28.3 °F47.9 °F2.42 in.
April38.8 °F61.0 °F3.65 in.
May50.3 °F72.2 °F4.66 in.
June60.2 °F81.4 °F4.58 in.
July63.7 °F84.3 °F4.13 in.
August61.7 °F82.5 °F3.76 in.
September53.6 °F77.4 °F3.31 in.
October41.9 °F64.2 °F3.08 in.
November31.4 °F49.4 °F2.52 in.
December21.6 °F36.8 °F2.05 in.
Annual40.5 °F60.4 °F38.01 in.

Climate Data for South Wilmington Illinois

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 5b : -15°F to -10°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
2024 plantmaps.com