Sylvanite, MT Weather & Growing Conditions
Overnight
45°F
Mostly Clear
Mostly clear, with a low around 45. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Mostly Clear | 3 mph E | 0% |
| Tuesday | 73°F | Mostly Sunny | 2 to 7 mph NNW | 0% |
| Tuesday Night | 52°F | Mostly Clear | 1 to 7 mph SW | 0% |
| Wednesday | 78°F | Sunny then Patchy Smoke | 2 to 7 mph SSE | 0% |
| Wednesday Night | 56°F | Patchy Smoke then Mostly Clear | 2 to 7 mph SSW | 0% |
| Thursday | 84°F | Sunny | 1 to 9 mph SSE | 0% |
| Thursday Night | 60°F | Mostly Clear | 2 to 10 mph S | 0% |
| Friday | 84°F | Sunny | 2 to 12 mph S | 0% |
| Friday Night | 60°F | Mostly Clear | 3 to 13 mph SSW | 0% |
| Saturday | 81°F | Sunny | 3 to 12 mph SSW | 0% |
| Saturday Night | 58°F | Mostly Clear | 2 to 10 mph S | 0% |
| Sunday | 78°F | Sunny | 2 to 9 mph SSW | 0% |
| Sunday Night | 56°F | Mostly Clear | 2 to 9 mph NW | 1% |
| Monday | 77°F | Sunny | 2 to 7 mph SE | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Sylvanite, MT
Last spring frost
May 14
First fall frost
Sep 25
Growing season
132 days
Hardiness zone
6a
Explore more for Sylvanite, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Troy, Mt (12.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.