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Weather in Caldwell, ID · National Weather Service + NOAA

Caldwell has hot summers

Caldwell has chilly winters and hot summers, with very little rain. A typical July afternoon reaches 93°, a January night drops to 24°, and about 10 inches of snow falls in a normal winter. Normal November highs come to 50°, and lows to 29°.

Winter 42°/25°Spring 66°/38°Summer 89°/55°Fall 66°/38°
Right now
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Sunrise 9:24 am · sunset 7:36 pm

Getting the latest forecast from the National Weather Service…

What stands out about Caldwell’s weather

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

Climate →
Hot summersJuly afternoons average 93°, hotter than 92% of U.S. towns.Less snow than most of IdahoAbout 10 inches a winter, less than 191 of 201 Idaho towns.A dry climateJust 11 inches of rain and melted snow a year, less than 98% of U.S. towns.Plenty of 90° daysAbout 59 days a year reach 90°.
A normal year

Where today sits in Caldwell’s year

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

Full climate →
Winter
42° / 25°
5 days with an inch or more of snow
Spring
66° / 38°
Last frost around Apr 29
Summer
89° / 55°
59 days reach 90° in a normal year
Fall now
66° / 38°
First frost around Oct 13
Pastthe usual first frost (Oct 13). Last frost next spring: Apr 29
Best months to be outside
MayJunSep
Highs of 62–84° and lows of 40° or more
How much snow does Caldwell get?About 10 inches a winter.When is it wettest?January, with 1.5 inches.Is it warmer than it used to be?+1.1° vs. the 20th century.

Weather talk

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

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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 Caldwell itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Nampa Sugar Factory, ID (5 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.