Green Valley Illinois Climate Data

Monthly Average Climate Data for Green Valley Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January17.1 °F34.0 °F2.11 in.
February20.5 °F38.8 °F1.93 in.
March30.3 °F50.9 °F2.57 in.
April40.9 °F64.0 °F3.88 in.
May52.6 °F74.4 °F4.72 in.
June62.0 °F83.3 °F4.51 in.
July64.9 °F86.3 °F4.08 in.
August62.6 °F84.8 °F3.51 in.
September54.3 °F79.6 °F3.37 in.
October42.5 °F66.8 °F3.13 in.
November31.8 °F51.6 °F2.8 in.
December22.7 °F39.2 °F2.2 in.
Annual41.9 °F62.8 °F38.81 in.

Climate Data for Green Valley 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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