Grangeville Idaho Climate Data

Monthly Average Climate Data for Grangeville Idaho

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January23.4 °F37.2 °F1.2 in.
February24.7 °F40.9 °F1.45 in.
March28.5 °F48.0 °F2.51 in.
April33.0 °F55.1 °F2.78 in.
May39.4 °F63.0 °F3.58 in.
June44.9 °F69.7 °F3.05 in.
July50.5 °F81.5 °F1.26 in.
August49.7 °F83.0 °F1.11 in.
September43.1 °F72.8 °F1.22 in.
October35.1 °F58.3 °F1.82 in.
November28.0 °F44.0 °F2.0 in.
December22.5 °F36.0 °F1.61 in.
Annual35.2 °F57.5 °F23.59 in.

Climate Data for Grangeville Idaho

Average First Frost DateSep. 21 - Sep. 30
Average Last Frost DateMay 21 - May 31
Average Days With Frost125-150 Days
Plant Hardiness Zone - 2023Zone 6b : -5°F to 0°F
Plant Hardiness Zone - 2012Zone 6a : -10°F to -5°F
Current Drought ConditionsModerate Drought
Köppen Climate ClassificationDfb - Humid Continental Mild Summer, Wet All Year
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