Sylvanite, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sylvanite, a community in Lincoln County, Montana.
Today
48°F
Partly Sunny
Partly sunny, with a high near 48. West southwest wind around 1 mph.
7-day forecast for Sylvanite
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 48°F | Partly Sunny | 1 mph WSW | 2% |
| Tonight | 32°F | Mostly Cloudy | 2 mph NNE | 2% |
| Wednesday | 51°F | Mostly Sunny | 2 mph S | 0% |
| Wednesday Night | 33°F | Partly Cloudy then Slight Chance Light Snow | 2 mph SSE | 17% |
| Thursday | 44°F | Chance Rain And Snow | 3 mph SSW | 44% |
| Thursday Night | 36°F | Slight Chance Rain And Snow then Mostly Cloudy | 5 mph SSW | 23% |
| Friday | 47°F | Chance Light Rain | 6 mph SSW | 28% |
| Friday Night | 35°F | Chance Light Rain then Mostly Cloudy | 5 to 10 mph SW | 27% |
| Saturday | 50°F | Partly Sunny | 5 mph SSW | 9% |
| Saturday Night | 38°F | Mostly Cloudy then Chance Light Rain | 2 to 6 mph SSE | 44% |
| Sunday | 52°F | Chance Light Rain | 7 mph SSW | 44% |
| Sunday Night | 37°F | Chance Light Rain | 5 to 8 mph SSW | 29% |
| Monday | 50°F | Slight Chance Light Rain | 5 mph S | 20% |
| Monday Night | 37°F | Chance Light Rain | 2 to 6 mph SSE | 38% |
Forecast source: National Weather Service (api.weather.gov) for Sylvanite (48.706, -115.874). Updated through the day.
Growing snapshot for Sylvanite
Last spring frost
May 14
First fall frost
Sep 25
Growing season
132 days
Hardiness zone
6a
More local growing data for Sylvanite: nearby ZIP 59935 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Eureka
Fortine
Happys Inn
Indian Springs
Libby
Pioneer Junction
Rexford
Stryker
Trego
Troy
West Kootenai
White Haven
Yaak
Climate data from the nearest NOAA station, Troy, Mt (12.1 mi from Sylvanite). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.