Fairfield, ID Weather & Growing Conditions
Today
66°F
Scattered Rain Showers
Scattered rain showers before noon, then scattered showers and thunderstorms between noon and 3pm, then isolated showers and thunderstorms. Partly sunny, with a high near 66. West southwest wind 3 to 12 mph. Chance of precipitation is 40%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Scattered Rain Showers | 3 to 12 mph WSW | 35% |
| Tonight | 36°F | Slight Chance Showers And Thunderstorms then Patchy Fog | 0 to 10 mph SSW | 16% |
| Sunday | 72°F | Areas Of Fog then Sunny | 0 to 8 mph S | 2% |
| Sunday Night | 39°F | Mostly Clear | 2 to 10 mph S | 0% |
| Monday | 76°F | Sunny | 3 to 9 mph E | 0% |
| Monday Night | 42°F | Partly Cloudy | 3 to 9 mph S | 0% |
| Tuesday | 77°F | Mostly Sunny | 0 to 12 mph SE | 1% |
| Tuesday Night | 42°F | Partly Cloudy | 6 mph NNW | 3% |
| Wednesday | 78°F | Sunny | 3 to 8 mph E | 0% |
| Wednesday Night | 44°F | Mostly Clear | 6 to 9 mph ENE | 2% |
| Thursday | 78°F | Sunny | 9 to 16 mph E | 0% |
| Thursday Night | 45°F | Partly Cloudy | 9 to 13 mph ENE | 4% |
| Friday | 77°F | Mostly Sunny | 12 mph ESE | 4% |
| Friday Night | 42°F | Partly Cloudy | 5 to 10 mph NW | 6% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fairfield, ID
Last spring frost
Jun 16
First fall frost
Sep 6
Growing season
80 days
Hardiness zone
5a
Explore more for Fairfield, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Hill City 1 W, Id (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.