Grayville Illinois Climate Data

Monthly Average Climate Data for Grayville Illinois

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January24.0 °F40.3 °F3.5 in.
February26.7 °F45.5 °F2.88 in.
March35.0 °F55.4 °F4.14 in.
April45.4 °F67.5 °F5.02 in.
May56.1 °F77.1 °F5.11 in.
June64.7 °F85.6 °F4.55 in.
July67.6 °F88.3 °F4.17 in.
August65.5 °F87.3 °F3.25 in.
September57.6 °F82.0 °F3.28 in.
October46.0 °F70.2 °F3.43 in.
November35.7 °F55.8 °F3.86 in.
December27.8 °F44.6 °F3.5 in.
Annual46 °F66.6 °F46.69 in.

Climate Data for Grayville Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 6b : -5°F to 0°F
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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