Sunburst, MT Weather & Growing Conditions
Tonight
30°F
Mostly Cloudy then Patchy Fog
Patchy fog after 5am. Mostly cloudy, with a low around 30. West southwest wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 30°F | Mostly Cloudy then Patchy Fog | 6 mph WSW | 0% |
| Wednesday | 46°F | Patchy Fog then Mostly Sunny | 2 to 6 mph N | 0% |
| Wednesday Night | 29°F | Mostly Clear | 2 to 8 mph SSE | 0% |
| Thursday | 52°F | Mostly Sunny | 8 to 20 mph SW | 0% |
| Thursday Night | 33°F | Partly Cloudy | 13 mph SW | 0% |
| Friday | 51°F | Mostly Sunny | 10 to 22 mph SW | 5% |
| Friday Night | 35°F | Partly Cloudy | 15 to 24 mph WSW | 5% |
| Saturday | 52°F | Mostly Sunny | 7 to 15 mph WSW | 1% |
| Saturday Night | 35°F | Mostly Cloudy | 7 to 12 mph SSW | 0% |
| Sunday | 57°F | Partly Sunny | 12 to 17 mph SW | 1% |
| Sunday Night | 37°F | Mostly Cloudy | 7 to 17 mph WSW | 3% |
| Monday | 51°F | Partly Sunny | 7 to 10 mph SW | 3% |
| Monday Night | 36°F | Mostly Cloudy | 10 mph S | 2% |
| Tuesday | 54°F | Partly Sunny | 10 to 17 mph SSW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sunburst, MT
Last spring frost
May 17
First fall frost
Sep 25
Growing season
129 days
Hardiness zone
4a
Explore more for Sunburst, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Sunburst 8 E, Mt (5.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.