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Climate & Weather Averages in Lewiston, Idaho, USA

Currently: 63 °F. Sunny. (Weather station: Lewiston-Nez Perce County Airport, USA). See more current weather

Annual 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

Quick Climate Info

Hottest MonthJuly (76 °F avg)
Coldest MonthDecember (35 °F avg)
Wettest MonthMay (1.61" avg)
Windiest MonthJanuary (8 mph avg)
Annual precip.13.17" (per year)

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