Fairfield, MT Weather & Growing Conditions
Overnight
43°F
Mostly Clear
Mostly clear, with a low around 43. West wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Mostly Clear | 3 mph W | 0% |
| Tuesday | 75°F | Sunny | 6 mph SSE | 0% |
| Tuesday Night | 50°F | Mostly Clear | 5 to 8 mph SSE | 1% |
| Wednesday | 84°F | Sunny | 5 to 8 mph W | 0% |
| Wednesday Night | 53°F | Mostly Clear | 7 mph WNW | 0% |
| Thursday | 92°F | Sunny | 8 mph WNW | 0% |
| Thursday Night | 57°F | Mostly Clear | 6 to 10 mph WNW | 0% |
| Friday | 95°F | Sunny | 3 to 20 mph W | 0% |
| Friday Night | 58°F | Mostly Clear | 10 to 20 mph W | 0% |
| Saturday | 91°F | Sunny | 5 to 13 mph W | 0% |
| Saturday Night | 58°F | Mostly Clear | 8 to 14 mph WNW | 0% |
| Sunday | 86°F | Sunny | 6 to 9 mph NNW | 1% |
| Sunday Night | 57°F | Partly Cloudy | 12 mph N | 1% |
| Monday | 84°F | Sunny | 8 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Fairfield, MT
Last spring frost
May 13
First fall frost
Sep 27
Growing season
135 days
Hardiness zone
4b
Explore more for Fairfield, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Fairfield, Mt (6.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.