Currently: 45 °F. Partly sunny. (Weather station: Lewiston-Nez Perce County Airport, USA). See more current weatherAnnual Weather Averages in Lewiston
Based on weather reports collected during 1992–2021.
All Year Climate & Weather Averages in Lewiston
High Temp: 91 °F
Low Temp: 29 °F
Mean Temp: 54 °F
Precipitation: 1.10"
Humidity: 57%
Dew Point: 37 °F
Wind: 6 mph
Pressure: 30.03 "Hg
Visibility: 10 mi
January Climate & Weather Averages in Lewiston
High Temp: 42 °F
Low Temp: 31 °F
Mean Temp: 36 °F
Precipitation: 1.18"
Humidity: 75%
Dew Point: 29 °F
Wind: 8 mph
Pressure: 30.15 "Hg
Visibility: 9 mi
February Climate & Weather Averages in Lewiston
High Temp: 47 °F
Low Temp: 32 °F
Mean Temp: 39 °F
Precipitation: 1.12"
Humidity: 69%
Dew Point: 29 °F
Wind: 7 mph
Pressure: 30.10 "Hg
Visibility: 10 mi
March Climate & Weather Averages in Lewiston
High Temp: 55 °F
Low Temp: 36 °F
Mean Temp: 45 °F
Precipitation: 1.31"
Humidity: 62%
Dew Point: 32 °F
Wind: 7 mph
Pressure: 30.04 "Hg
Visibility: 11 mi
April Climate & Weather Averages in Lewiston
High Temp: 62 °F
Low Temp: 40 °F
Mean Temp: 51 °F
Precipitation: 1.49"
Humidity: 56%
Dew Point: 36 °F
Wind: 7 mph
Pressure: 30.00 "Hg
Visibility: 11 mi
May Climate & Weather Averages in Lewiston
High Temp: 72 °F
Low Temp: 48 °F
Mean Temp: 60 °F
Precipitation: 1.61"
Humidity: 52%
Dew Point: 41 °F
Wind: 6 mph
Pressure: 29.96 "Hg
Visibility: 11 mi
June Climate & Weather Averages in Lewiston
High Temp: 79 °F
Low Temp: 54 °F
Mean Temp: 67 °F
Precipitation: 1.24"
Humidity: 48%
Dew Point: 46 °F
Wind: 6 mph
Pressure: 29.93 "Hg
Visibility: 11 mi
July Climate & Weather Averages in Lewiston
High Temp: 91 °F
Low Temp: 61 °F
Mean Temp: 76 °F
Precipitation: 0.47"
Humidity: 35%
Dew Point: 46 °F
Wind: 6 mph
Pressure: 29.92 "Hg
Visibility: 10 mi
August Climate & Weather Averages in Lewiston
High Temp: 90 °F
Low Temp: 60 °F
Mean Temp: 75 °F
Precipitation: 0.48"
Humidity: 34%
Dew Point: 44 °F
Wind: 5 mph
Pressure: 29.91 "Hg
Visibility: 10 mi
September Climate & Weather Averages in Lewiston
High Temp: 79 °F
Low Temp: 52 °F
Mean Temp: 66 °F
Precipitation: 0.69"
Humidity: 42%
Dew Point: 41 °F
Wind: 5 mph
Pressure: 29.97 "Hg
Visibility: 10 mi
October Climate & Weather Averages in Lewiston
High Temp: 63 °F
Low Temp: 42 °F
Mean Temp: 52 °F
Precipitation: 1.11"
Humidity: 59%
Dew Point: 38 °F
Wind: 5 mph
Pressure: 30.06 "Hg
Visibility: 10 mi
November Climate & Weather Averages in Lewiston
High Temp: 49 °F
Low Temp: 34 °F
Mean Temp: 42 °F
Precipitation: 1.26"
Humidity: 72%
Dew Point: 33 °F
Wind: 7 mph
Pressure: 30.12 "Hg
Visibility: 9 mi
December Climate & Weather Averages in Lewiston
High Temp: 41 °F
Low Temp: 29 °F
Mean Temp: 35 °F
Precipitation: 1.21"
Humidity: 75%
Dew Point: 28 °F
Wind: 7 mph
Pressure: 30.16 "Hg
Visibility: 9 mi