Fairfield, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfield, a town in Cascade County, Montana.
Overnight
43°F
Mostly Clear
Mostly clear, with a low around 43. West wind around 3 mph.
7-day forecast for Fairfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Mostly Clear | 3 mph W | 0% |
| Tuesday | 76°F | Sunny | 2 to 6 mph S | 0% |
| Tuesday Night | 49°F | Mostly Clear | 3 to 7 mph ESE | 1% |
| Wednesday | 84°F | Sunny | 7 mph W | 0% |
| Wednesday Night | 52°F | Mostly Clear | 7 mph NW | 0% |
| Thursday | 90°F | Sunny | 8 mph WNW | 0% |
| Thursday Night | 55°F | Mostly Clear | 5 to 10 mph WNW | 0% |
| Friday | 94°F | Sunny | 3 to 18 mph W | 0% |
| Friday Night | 57°F | Mostly Clear | 9 to 20 mph W | 0% |
| Saturday | 91°F | Sunny | 5 to 13 mph W | 0% |
| Saturday Night | 57°F | Mostly Clear | 7 to 14 mph NW | 0% |
| Sunday | 87°F | Sunny | 6 to 9 mph NNW | 0% |
| Sunday Night | 56°F | Partly Cloudy | 12 mph N | 1% |
| Monday | 84°F | Sunny | 8 mph NNE | 4% |
Forecast source: National Weather Service (api.weather.gov) for Fairfield (47.615, -111.981). Updated through the day.
Growing snapshot for Fairfield
Last spring frost
Jun 2
First fall frost
Sep 10
Growing season
96 days
Hardiness zone
4b
More local growing data for Fairfield: nearby ZIP 59443 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Belt
Big Stone Colony
Black Eagle
Cascade
Cascade Colony
Centerville
Fair Haven Colony
Fort Shaw
Gibson Flats
Great Falls
Hardy
Malmstrom AFB
Monarch
Neihart
Pleasant Valley Colony
Riceville
Sand Coulee
Simms
Stockett
Sun Prairie
Sun River
Tracy
Ulm
Vaughn
Climate data from the nearest NOAA station, Sun Rvr 4 S, Mt (7.4 mi from Fairfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.