Fairfield, ID Weather & Growing Conditions
Tonight
39°F
Mostly Clear
Mostly clear, with a low around 39. Northeast wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 39°F | Mostly Clear | 7 mph NE | 14% |
| Sunday | 60°F | Sunny | 5 to 8 mph ESE | 2% |
| Sunday Night | 42°F | Mostly Clear | 8 mph E | 1% |
| Monday | 64°F | Sunny | 10 mph ESE | 0% |
| Monday Night | 45°F | Partly Cloudy | 8 mph NE | 0% |
| Tuesday | 66°F | Mostly Sunny | 7 to 10 mph E | 2% |
| Tuesday Night | 47°F | Partly Cloudy | 7 mph N | 4% |
| Wednesday | 66°F | Sunny | 6 to 10 mph E | 2% |
| Wednesday Night | 47°F | Partly Cloudy | 9 mph N | 1% |
| Thursday | 68°F | Sunny | 9 to 13 mph E | 0% |
| Thursday Night | 49°F | Partly Cloudy | 12 mph ENE | 0% |
| Friday | 67°F | Mostly Sunny | 9 to 14 mph ESE | 1% |
| Friday Night | 46°F | Partly Cloudy | 7 to 12 mph N | 6% |
| Saturday | 62°F | Mostly Sunny | 6 to 13 mph SSE | 8% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fairfield, ID
Last spring frost
Jun 8
First fall frost
Sep 14
Growing season
97 days
Hardiness zone
6a
Explore more for Fairfield, ID: full frost dates · planting calendar · Idaho frost dates
Climate data from the nearest NOAA station, Fairfield Rs, Id (11.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.