Grayville Illinois Climate Data

Monthly Average Climate Data for Grayville Illinois

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.4 °C4.6 °C88.9 mm
February-2.9 °C7.5 °C73.15 mm
March1.7 °C13 °C105.16 mm
April7.4 °C19.7 °C127.51 mm
May13.4 °C25.1 °C129.79 mm
June18.2 °C29.8 °C115.57 mm
July19.8 °C31.3 °C105.92 mm
August18.6 °C30.7 °C82.55 mm
September14.2 °C27.8 °C83.31 mm
October7.8 °C21.2 °C87.12 mm
November2.1 °C13.2 °C98.04 mm
December-2.3 °C7 °C88.9 mm
Annual7.8 °C19.2 °C1185.92 mm

Climate Data for Grayville Illinois

Average First Frost DateOct. 21 - Oct. 31
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 6b : -20.6°C to -17.8°C
Current Drought ConditionsNormal
Köppen Climate ClassificationDfa - Humid Continental Hot Summers With Year Around Precipitation
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