Umatilla Oregon Climate Data

Monthly Average Climate Data for Umatilla Oregon

Switch Data to Celsius/Metric Units
MonthAvg. LowAvg. HighAvg. Precip
January28.8 °F42.1 °F1.19 in.
February29.3 °F48.0 °F0.88 in.
March33.9 °F57.6 °F0.85 in.
April39.9 °F65.4 °F0.71 in.
May47.5 °F74.4 °F0.89 in.
June53.6 °F81.1 °F0.63 in.
July59.3 °F90.7 °F0.17 in.
August58.5 °F89.8 °F0.22 in.
September50.0 °F80.4 °F0.38 in.
October40.4 °F65.8 °F0.82 in.
November33.3 °F50.9 °F1.03 in.
December28.9 °F41.6 °F1.32 in.
Annual42 °F65.7 °F9.09 in.

Climate Data for Umatilla Oregon

Average First Frost DateOct. 11 - Oct. 20
Average Last Frost DateApr. 21 - Apr. 30
Average Days With Frost75-100 Days
Plant Hardiness Zone - 2023Zone 7b : 5°F to 10°F
Plant Hardiness Zone - 2012Zone 7b : 5°F to 10°F
Current Drought ConditionsNormal
Köppen Climate ClassificationBSk - Cold Semi-Arid Climate