Currently: 46 °F. Passing clouds. (Weather station: Hermiston Municipal Airport, USA). See more current weatherAnnual Weather Averages in Hermiston
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Hermiston
High Temp: 92 °F
Low Temp: 28 °F
Mean Temp: 53 °F
Precipitation: 0.82"
Humidity: 60%
Dew Point: 38 °F
Wind: 11 mph
Pressure: 30.03 "Hg
Visibility: 10 mi
January Climate & Weather Averages in Hermiston
High Temp: 43 °F
Low Temp: 29 °F
Mean Temp: 36 °F
Precipitation: 1.25"
Humidity: 81%
Dew Point: 30 °F
Wind: 8 mph
Pressure: 30.15 "Hg
Visibility: 8 mi
February Climate & Weather Averages in Hermiston
High Temp: 49 °F
Low Temp: 29 °F
Mean Temp: 39 °F
Precipitation: 0.92"
Humidity: 74%
Dew Point: 30 °F
Wind: 9 mph
Pressure: 30.10 "Hg
Visibility: 9 mi
March Climate & Weather Averages in Hermiston
High Temp: 58 °F
Low Temp: 33 °F
Mean Temp: 46 °F
Precipitation: 0.83"
Humidity: 64%
Dew Point: 33 °F
Wind: 12 mph
Pressure: 30.04 "Hg
Visibility: 10 mi
April Climate & Weather Averages in Hermiston
High Temp: 66 °F
Low Temp: 38 °F
Mean Temp: 52 °F
Precipitation: 0.95"
Humidity: 57%
Dew Point: 36 °F
Wind: 13 mph
Pressure: 30.01 "Hg
Visibility: 11 mi
May Climate & Weather Averages in Hermiston
High Temp: 75 °F
Low Temp: 46 °F
Mean Temp: 60 °F
Precipitation: 1.02"
Humidity: 52%
Dew Point: 42 °F
Wind: 13 mph
Pressure: 29.96 "Hg
Visibility: 11 mi
June Climate & Weather Averages in Hermiston
High Temp: 82 °F
Low Temp: 53 °F
Mean Temp: 67 °F
Precipitation: 0.70"
Humidity: 46%
Dew Point: 45 °F
Wind: 14 mph
Pressure: 29.93 "Hg
Visibility: 10 mi
July Climate & Weather Averages in Hermiston
High Temp: 92 °F
Low Temp: 58 °F
Mean Temp: 75 °F
Precipitation: 0.16"
Humidity: 38%
Dew Point: 47 °F
Wind: 12 mph
Pressure: 29.92 "Hg
Visibility: 10 mi
August Climate & Weather Averages in Hermiston
High Temp: 90 °F
Low Temp: 57 °F
Mean Temp: 73 °F
Precipitation: 0.17"
Humidity: 41%
Dew Point: 47 °F
Wind: 11 mph
Pressure: 29.91 "Hg
Visibility: 10 mi
September Climate & Weather Averages in Hermiston
High Temp: 80 °F
Low Temp: 48 °F
Mean Temp: 64 °F
Precipitation: 0.36"
Humidity: 49%
Dew Point: 44 °F
Wind: 10 mph
Pressure: 29.97 "Hg
Visibility: 10 mi
October Climate & Weather Averages in Hermiston
High Temp: 65 °F
Low Temp: 39 °F
Mean Temp: 52 °F
Precipitation: 0.97"
Humidity: 63%
Dew Point: 39 °F
Wind: 9 mph
Pressure: 30.06 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Hermiston
High Temp: 51 °F
Low Temp: 32 °F
Mean Temp: 41 °F
Precipitation: 1.12"
Humidity: 78%
Dew Point: 34 °F
Wind: 9 mph
Pressure: 30.12 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Hermiston
High Temp: 41 °F
Low Temp: 28 °F
Mean Temp: 35 °F
Precipitation: 1.40"
Humidity: 82%
Dew Point: 29 °F
Wind: 8 mph
Pressure: 30.16 "Hg
Visibility: 8 mi