Fairfield, ID Weather & Growing Conditions
Overnight
31°F
Mostly Cloudy
Mostly cloudy, with a low around 31. West southwest wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 31°F | Mostly Cloudy | 3 mph WSW | 2% |
| Wednesday | 52°F | Mostly Sunny | 3 to 9 mph SW | 2% |
| Wednesday Night | 27°F | Partly Cloudy | 1 to 8 mph SW | 2% |
| Thursday | 49°F | Partly Sunny | 1 to 12 mph W | 5% |
| Thursday Night | 20°F | Mostly Clear | 1 to 12 mph WSW | 0% |
| Friday | 52°F | Sunny | 1 to 7 mph W | 0% |
| Friday Night | 24°F | Partly Cloudy | 1 to 6 mph W | 0% |
| Saturday | 55°F | Sunny | 1 to 8 mph NE | 0% |
| Saturday Night | 31°F | Partly Cloudy | 7 to 10 mph ENE | 0% |
| Sunday | 58°F | Mostly Sunny | 3 to 7 mph ESE | 0% |
| Sunday Night | 32°F | Partly Cloudy | 1 to 5 mph NNE | 0% |
| Monday | 58°F | Mostly Sunny | 1 to 5 mph E | 0% |
| Monday Night | 32°F | Mostly Cloudy | 1 to 5 mph NNE | 0% |
| Tuesday | 57°F | Mostly Sunny | 3 mph WNW | 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 Nov 4, 2026.