Grass Valley Oregon Climate Data

Monthly Average Climate Data for Grass Valley Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-2.8 °C4.6 °C46.23 mm
February-1.9 °C7 °C37.85 mm
March0.1 °C10.9 °C28.7 mm
April2.1 °C14.6 °C27.43 mm
May5.7 °C19.5 °C32.26 mm
June8.7 °C23.4 °C19.05 mm
July12.4 °C29.3 °C7.11 mm
August12.5 °C29.2 °C6.35 mm
September8.9 °C24.8 °C10.41 mm
October4.2 °C16.8 °C26.92 mm
November-0.2 °C8.8 °C44.45 mm
December-3.3 °C4 °C53.85 mm
Annual3.9 °C16.1 °C340.61 mm

Climate Data for Grass Valley Oregon

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateMay 11 - May 20
Average Days With Frost100-125 Days
Plant Hardiness Zone - 2023Zone 7a : -17.8°C to -15°C
Plant Hardiness Zone - 2012Zone 7a : -17.8°C to -15°C
Current Drought ConditionsSevere Drought
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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