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Weather in Fairfield, ID · National Weather Service + NOAA

Winter means it in Fairfield

Fairfield has cold winters and warm summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 9°. A typical November afternoon reaches 43°, and nights fall to 20°.

Winter 32°/11°Spring 54°/29°Summer 80°/45°Fall 58°/29°
Right now
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Sunrise 9:19 am · sunset 7:25 pm

Getting the latest forecast from the National Weather Service…

What stands out about Fairfield’s weather

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

Climate →
Among Idaho’s coldest wintersJanuary nights average 9°, colder than 215 of 234 Idaho towns.A dry climateJust 14 inches of rain and melted snow a year, less than 95% of U.S. towns.A long heating seasonMore heating degree days than 91% of U.S. towns.
A normal year

Where today sits in Fairfield’s year

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

Full climate →
Winter
32° / 11°
Snow is rare
Spring
54° / 29°
Last frost around Jun 8
Summer
80° / 45°
19 days reach 90° in a normal year
Fall now
58° / 29°
First frost around Sep 14
Pastthe usual first frost (Sep 14). Last frost next spring: Jun 8
Best months to be outside
JunAug
Highs of 62–84° and lows of 40° or more
When is it wettest?December, with 2.5 inches.Is it warmer than it used to be?+1.5° vs. the 20th century.What is each month like?Highs, lows, rain and snow for all 12.

Weather talk

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

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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 Fairfield itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Fairfield Rs, ID (1 mi, frost, heat and degree days). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.