Grangeville Idaho Climate Data

Monthly Average Climate Data for Grangeville Idaho

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-4.8 °C2.9 °C30.48 mm
February-4.1 °C4.9 °C36.83 mm
March-1.9 °C8.9 °C63.75 mm
April0.6 °C12.8 °C70.61 mm
May4.1 °C17.2 °C90.93 mm
June7.2 °C20.9 °C77.47 mm
July10.3 °C27.5 °C32 mm
August9.8 °C28.3 °C28.19 mm
September6.2 °C22.7 °C30.99 mm
October1.7 °C14.6 °C46.23 mm
November-2.2 °C6.7 °C50.8 mm
December-5.3 °C2.2 °C40.89 mm
Annual1.8 °C14.1 °C599.17 mm

Climate Data for Grangeville Idaho

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateJun. 1 - Jun. 10
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -20.6°C to -17.8°C
Plant Hardiness Zone - 2012Zone 6a : -23.3°C to -20.6°C
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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