Clinton Illinois Climate Data

Monthly Average Climate Data for Clinton Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.2 °F33.7 °F2.34 in.
February20.4 °F38.5 °F2.03 in.
March29.5 °F50.1 °F2.81 in.
April40.4 °F63.4 °F3.99 in.
May52.1 °F73.8 °F4.55 in.
June61.3 °F82.6 °F4.56 in.
July64.3 °F85.4 °F4.21 in.
August62.1 °F83.6 °F3.36 in.
September54.4 °F78.8 °F3.13 in.
October42.6 °F65.9 °F3.48 in.
November31.7 °F51.1 °F3.08 in.
December22.9 °F38.6 °F2.49 in.
Annual41.6 °F62.1 °F40.03 in.

Climate Data for Clinton 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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