Bloomfield, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Bloomfield, a community in Dawson County, Montana.
Overnight
43°F
Mostly Clear
Mostly clear, with a low around 43. West southwest wind around 7 mph.
7-day forecast for Bloomfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 43°F | Mostly Clear | 7 mph WSW | 0% |
| Tuesday | 72°F | Sunny | 7 to 16 mph W | 0% |
| Tuesday Night | 50°F | Mostly Clear | 3 to 12 mph WSW | 1% |
| Wednesday | 82°F | Partly Sunny | 7 to 13 mph WSW | 0% |
| Wednesday Night | 55°F | Partly Cloudy | 3 to 10 mph WSW | 0% |
| Thursday | 89°F | Sunny | 3 to 8 mph W | 0% |
| Thursday Night | 57°F | Mostly Clear | 7 to 10 mph N | 0% |
| Friday | 89°F | Sunny | 8 mph E | 0% |
| Friday Night | 59°F | Mostly Clear | 7 to 10 mph NE | 0% |
| Saturday | 90°F | Sunny | 7 to 12 mph NE | 0% |
| Saturday Night | 60°F | Mostly Clear | 8 to 12 mph NE | 2% |
| Sunday | 89°F | Mostly Sunny | 8 to 14 mph ENE | 3% |
| Sunday Night | 60°F | Partly Cloudy | 14 mph NE | 13% |
| Monday | 85°F | Partly Sunny then Slight Chance Showers And Thunderstorms | 14 mph ENE | 22% |
Forecast source: National Weather Service (api.weather.gov) for Bloomfield (47.412, -104.919). Updated through the day.
Growing snapshot for Bloomfield
Last spring frost
May 12
First fall frost
Sep 25
Growing season
135 days
Hardiness zone
4a
More local growing data for Bloomfield: nearby ZIP 59315 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Savage, Mt (24.8 mi from Bloomfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.