Brockton, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brockton, a community in Roosevelt County, Montana.
This Afternoon
52°F
Sunny
Sunny. High near 52, with temperatures falling to around 45 in the afternoon. West northwest wind around 5 mph.
7-day forecast for Brockton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 52°F | Sunny | 5 mph WNW | 0% |
| Tonight | 25°F | Patchy Fog | 5 mph NE | 0% |
| Thursday | 52°F | Patchy Fog then Mostly Sunny | 3 to 9 mph SE | 0% |
| Thursday Night | 29°F | Partly Cloudy | 7 mph SW | 0% |
| Friday | 53°F | Mostly Sunny | 6 to 12 mph WSW | 0% |
| Friday Night | 33°F | Mostly Clear | 6 to 13 mph SW | 0% |
| Saturday | 58°F | Mostly Sunny | 5 to 13 mph W | 0% |
| Saturday Night | 30°F | Mostly Clear | 5 mph SW | 0% |
| Sunday | 63°F | Mostly Sunny | 5 to 10 mph SSW | 0% |
| Sunday Night | 37°F | Partly Cloudy | 8 to 12 mph WSW | 0% |
| Monday | 55°F | Mostly Sunny | 6 to 12 mph W | 2% |
| Monday Night | 31°F | Partly Cloudy | 6 mph SW | 2% |
| Tuesday | 57°F | Mostly Sunny | 3 to 8 mph S | 0% |
| Tuesday Night | 34°F | Partly Cloudy | 7 mph SSW | 4% |
Forecast source: National Weather Service (api.weather.gov) for Brockton (48.156, -104.903). Updated through the day.
Growing snapshot for Brockton
Last spring frost
May 24
First fall frost
Sep 14
Growing season
110 days
Hardiness zone
4a
More local growing data for Brockton: nearby ZIP 59213 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Wolf Point 29 Ene, Mt (12.9 mi from Brockton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.