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Lewiston, ID weather and climate

Nez Perce County, ID · population 34,471 · about 1,273 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Lewiston's own coordinates.

The year at a glance

Sunny days
201
clear or partly cloudy, per year
Precipitation
20 in
per year
Wet days
106
rain or snow per year
Snowfall
17 in
per year
Hot days
44
above 90 °F
Freezing nights
80
at or below 32 °F
Humidity
63%
average relative
Average temperature
54 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 42 °FDaily high, Feb: 47 °FDaily high, Mar: 55 °FDaily high, Apr: 62 °FDaily high, May: 72 °FDaily high, Jun: 79 °FDaily high, Jul: 91 °FDaily high, Aug: 90 °FDaily high, Sep: 80 °FDaily high, Oct: 63 °FDaily high, Nov: 49 °FDaily high, Dec: 41 °FDaily low, Jan: 30 °FDaily low, Feb: 32 °FDaily low, Mar: 36 °FDaily low, Apr: 41 °FDaily low, May: 48 °FDaily low, Jun: 54 °FDaily low, Jul: 61 °FDaily low, Aug: 60 °FDaily low, Sep: 52 °FDaily low, Oct: 42 °FDaily low, Nov: 35 °FDaily low, Dec: 29 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high424755627279919080634941
Daily low303236414854616052423529

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.01.02.0JanMarMayJulSepNovLewiston, Jan: 2.4 inLewiston, Feb: 2.0 inLewiston, Mar: 2.4 inLewiston, Apr: 2.0 inLewiston, May: 1.9 inLewiston, Jun: 1.2 inLewiston, Jul: 0.4 inLewiston, Aug: 0.4 inLewiston, Sep: 0.7 inLewiston, Oct: 1.7 inLewiston, Nov: 2.5 inLewiston, Dec: 2.7 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lewiston2.42.02.42.01.91.20.40.40.71.72.52.7

Monthly sunny days

Days each month with clear or partly cloudy skies.

01020JanMarMayJulSepNovLewiston, Jan: 10 daysLewiston, Feb: 11 daysLewiston, Mar: 13 daysLewiston, Apr: 14 daysLewiston, May: 18 daysLewiston, Jun: 19 daysLewiston, Jul: 28 daysLewiston, Aug: 27 daysLewiston, Sep: 23 daysLewiston, Oct: 18 daysLewiston, Nov: 11 daysLewiston, Dec: 9 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Lewiston10111314181928272318119

Compare Lewiston with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

See weather for every covered Idaho city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).

Citing this page

Writing about Lewiston's climate in a report or paper? Cite this page directly. The reference period is part of the citation, so it stays accurate even as individual numbers are refined; add an access date in whatever citation style you use.

VSWeather. Lewiston, ID weather and climate: 1991-2020 climate normals. https://vsweather.com/weather/lewiston-id/. Computed from Open-Meteo historical reanalysis, station-calibrated against NOAA NCEI climate normals.

BibTeX entry
@misc{vsweather_lewiston_id,
  author = {{VSWeather}},
  title = {Lewiston, ID weather and climate: 1991-2020 climate normals},
  howpublished = {\url{https://vsweather.com/weather/lewiston-id/}},
  note = {Computed from Open-Meteo historical reanalysis, station-calibrated against NOAA NCEI climate normals}
}

How to cite VSWeather explains the sources and verification behind these numbers.