Umatilla Oregon Climate Data

Monthly Average Climate Data for Umatilla Oregon

Switch Data to Fahrenheit
MonthAvg. LowAvg. HighAvg. Precip
January-1.8 °C5.6 °C30.23 mm
February-1.5 °C8.9 °C22.35 mm
March1.1 °C14.2 °C21.59 mm
April4.4 °C18.6 °C18.03 mm
May8.6 °C23.6 °C22.61 mm
June12 °C27.3 °C16 mm
July15.2 °C32.6 °C4.32 mm
August14.7 °C32.1 °C5.59 mm
September10 °C26.9 °C9.65 mm
October4.7 °C18.8 °C20.83 mm
November0.7 °C10.5 °C26.16 mm
December-1.7 °C5.3 °C33.53 mm
Annual5.5 °C18.7 °C230.89 mm

Climate Data for Umatilla Oregon

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 11 - Apr. 20
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : -15°C to -12.2°C
Plant Hardiness Zone - 2012Zone 7b : -15°C to -12.2°C
Current Drought ConditionsAbnormally Dry
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate
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