Grass Valley Oregon Climate Data

Monthly Average Climate Data for Grass Valley Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January26.9 °F40.3 °F1.82 in.
February28.5 °F44.6 °F1.49 in.
March32.1 °F51.7 °F1.13 in.
April35.7 °F58.3 °F1.08 in.
May42.2 °F67.1 °F1.27 in.
June47.7 °F74.2 °F0.75 in.
July54.4 °F84.7 °F0.28 in.
August54.5 °F84.6 °F0.25 in.
September48.1 °F76.6 °F0.41 in.
October39.5 °F62.2 °F1.06 in.
November31.6 °F47.8 °F1.75 in.
December26.1 °F39.2 °F2.12 in.
Annual38.9 °F60.9 °F13.41 in.

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 : 0°F to 5°F
Plant Hardiness Zone - 2012Zone 7a : 0°F to 5°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate