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Weather in Lewiston, ID · National Weather Service + NOAA

Lewiston has milder winters than most of Idaho

Lewiston has mild winters and warm summers, with very little rain. A typical July afternoon reaches 92°, a January night drops to 30°, and about 13 inches of snow falls in a normal winter. In November, a normal day reaches 50° and a normal night drops to 34°.

Winter 43°/30°Spring 65°/40°Summer 88°/56°Fall 65°/41°
Right now
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Sunrise 6:31 am · sunset 4:31 pm

Getting the latest forecast from the National Weather Service…

What stands out about Lewiston’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Milder winters than most of IdahoJanuary nights average 30°, milder than 233 of 234 Idaho towns.A long growing season200 frost-free days, from Apr 6 to Oct 26.A dry climateJust 14 inches of rain and melted snow a year, less than 95% of U.S. towns.Less snow than most of IdahoAbout 13 inches a winter, less than 178 of 201 Idaho towns.
A normal year

Where today sits in Lewiston’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
43° / 30°
4 days with an inch or more of snow
Spring
65° / 40°
Last frost around Apr 6
Summer
88° / 56°
44 days reach 90° in a normal year
Fall now
65° / 41°
First frost around Oct 26
Pastthe usual first frost (Oct 26). Last frost next spring: Apr 6
Best months to be outside
MayJunSep
Highs of 62–84° and lows of 40° or more
How much snow does Lewiston get?About 13 inches a winter.When is it wettest?May, with 1.8 inches.Is it warmer than it used to be?+1.4° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Lewiston.

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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Lewiston itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Lewiston Nez Perce Co Airport, ID (2 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.