Sylvanite, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Sylvanite, a community in Lincoln County, Montana.
Overnight
47°F
Mostly Clear
Mostly clear, with a low around 47. North northwest wind around 2 mph.
7-day forecast for Sylvanite
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 47°F | Mostly Clear | 2 mph NNW | 0% |
| Tuesday | 78°F | Sunny | 1 to 5 mph NW | 0% |
| Tuesday Night | 53°F | Mostly Clear | 1 to 5 mph WNW | 0% |
| Wednesday | 83°F | Sunny then Patchy Smoke | 1 to 5 mph WSW | 0% |
| Wednesday Night | 56°F | Patchy Smoke then Mostly Clear | 1 to 5 mph S | 0% |
| Thursday | 88°F | Sunny | 0 to 7 mph SSW | 0% |
| Thursday Night | 59°F | Mostly Clear | 1 to 7 mph SSE | 0% |
| Friday | 88°F | Sunny | 1 to 8 mph SSE | 0% |
| Friday Night | 59°F | Mostly Clear | 5 to 14 mph SSW | 0% |
| Saturday | 85°F | Sunny | 3 to 12 mph SSW | 0% |
| Saturday Night | 58°F | Mostly Clear | 3 to 12 mph S | 0% |
| Sunday | 83°F | Sunny | 3 to 9 mph SSW | 0% |
| Sunday Night | 56°F | Mostly Clear | 3 to 9 mph N | 1% |
| Monday | 82°F | Sunny | 2 to 6 mph WNW | 1% |
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 Aug 4, 2026.