Fairfield, MT Weather & Growing Conditions
Overnight
52°F
Chance Light Rain
A chance of rain after 3am. Cloudy, with a low around 52. North northwest wind around 9 mph. Chance of precipitation is 30%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Chance Light Rain | 9 mph NNW | 28% |
| Saturday | 65°F | Mostly Cloudy | 6 to 9 mph NNE | 11% |
| Saturday Night | 46°F | Mostly Cloudy | 2 to 6 mph S | 2% |
| Sunday | 72°F | Mostly Sunny | 6 mph S | 0% |
| Sunday Night | 46°F | Mostly Clear | 6 mph SSE | 0% |
| Monday | 77°F | Sunny | 7 mph SSW | 0% |
| Monday Night | 49°F | Mostly Clear | 7 mph SW | 0% |
| Tuesday | 76°F | Sunny | 3 to 7 mph WSW | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 6 mph WSW | 3% |
| Wednesday | 77°F | Sunny | 5 to 8 mph SW | 1% |
| Wednesday Night | 50°F | Partly Cloudy | 5 to 8 mph SW | 3% |
| Thursday | 77°F | Sunny | 6 to 10 mph SSW | 1% |
| Thursday Night | 50°F | Partly Cloudy | 5 to 9 mph SW | 8% |
| Friday | 73°F | Mostly Sunny | 6 to 10 mph SSW | 6% |
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 Sep 19, 2026.