Sylvanite, MT Weather & Growing Conditions
Tonight
47°F
Mostly Clear
Mostly clear, with a low around 47. West northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 47°F | Mostly Clear | 5 mph WNW | 0% |
| Saturday | 70°F | Sunny | 3 mph ENE | 0% |
| Saturday Night | 48°F | Partly Cloudy | 2 mph SSE | 0% |
| Sunday | 69°F | Sunny | 3 mph SW | 0% |
| Sunday Night | 48°F | Clear | 3 mph SSE | 0% |
| Monday | 70°F | Sunny | 2 to 6 mph SSE | 0% |
| Monday Night | 49°F | Partly Cloudy | 1 to 5 mph S | 0% |
| Tuesday | 68°F | Mostly Sunny | 5 mph S | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 5 mph SSW | 1% |
| Wednesday | 63°F | Mostly Sunny | 2 to 8 mph SSW | 0% |
| Wednesday Night | 46°F | Partly Cloudy | 2 to 6 mph SSE | 0% |
| Thursday | 67°F | Mostly Sunny | 3 mph SE | 1% |
| Thursday Night | 49°F | Partly Cloudy | 3 mph ENE | 6% |
| Friday | 64°F | Partly Sunny | 6 mph SSW | 9% |
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 Sep 19, 2026.