Fairfield, ID Weather & Growing Conditions
Tonight
44°F
Mostly Clear
Mostly clear, with a low around 44. North wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Mostly Clear | 3 mph N | 2% |
| Sunday | 68°F | Sunny | 2 to 7 mph SE | 1% |
| Sunday Night | 47°F | Mostly Clear | 7 mph ENE | 0% |
| Monday | 73°F | Sunny | 8 to 12 mph E | 0% |
| Monday Night | 50°F | Partly Cloudy | 8 mph NE | 0% |
| Tuesday | 74°F | Mostly Sunny | 5 to 8 mph E | 0% |
| Tuesday Night | 51°F | Partly Cloudy | 7 mph N | 5% |
| Wednesday | 75°F | Sunny | 6 to 9 mph ESE | 1% |
| Wednesday Night | 52°F | Mostly Clear | 6 to 12 mph NNE | 1% |
| Thursday | 77°F | Sunny | 12 to 16 mph E | 0% |
| Thursday Night | 53°F | Partly Cloudy | 9 to 15 mph E | 0% |
| Friday | 75°F | Mostly Sunny | 13 mph ESE | 1% |
| Friday Night | 49°F | Mostly Cloudy | 6 to 12 mph WNW | 4% |
| Saturday | 69°F | Mostly Sunny | 5 to 10 mph S | 4% |
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 (6.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.