Fairfield, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Fairfield, a town in Cascade County, Montana.
This Afternoon
48°F
Sunny
Sunny. High near 48, with temperatures falling to around 42 in the afternoon. Southeast wind around 2 mph.
7-day forecast for Fairfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Sunny | 2 mph SE | 0% |
| Tonight | 31°F | Mostly Clear | 2 to 10 mph S | 0% |
| Thursday | 52°F | Mostly Sunny | 10 to 14 mph SW | 1% |
| Thursday Night | 33°F | Mostly Clear | 12 mph SW | 0% |
| Friday | 52°F | Sunny | 12 to 20 mph SW | 0% |
| Friday Night | 40°F | Mostly Cloudy | 12 to 17 mph SW | 3% |
| Saturday | 58°F | Mostly Sunny | 8 to 13 mph SSW | 3% |
| Saturday Night | 41°F | Partly Cloudy | 8 to 15 mph SSW | 0% |
| Sunday | 62°F | Partly Sunny | 13 to 21 mph SW | 0% |
| Sunday Night | 37°F | Mostly Cloudy | 6 to 13 mph SW | 0% |
| Monday | 53°F | Partly Sunny | 6 to 9 mph SSW | 0% |
| Monday Night | 38°F | Mostly Cloudy | 6 to 12 mph SSW | 0% |
| Tuesday | 57°F | Mostly Sunny | 12 to 18 mph SW | 1% |
| Tuesday Night | 41°F | Partly Cloudy | 14 mph SW | 1% |
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
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Big Stone Colony
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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 Nov 5, 2026.