Troy, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Troy, a city in Lincoln County, Montana.
Tonight
29°F
Mostly Cloudy
Mostly cloudy, with a low around 29. Wind around 0 mph.
7-day forecast for Troy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 29°F | Mostly Cloudy | 0 mph | 3% |
| Wednesday | 56°F | Mostly Sunny | 0 mph | 1% |
| Wednesday Night | 30°F | Partly Cloudy then Chance Rain And Snow | 1 mph SSW | 33% |
| Thursday | 49°F | Chance Rain And Snow | 2 mph SSW | 51% |
| Thursday Night | 33°F | Slight Chance Light Rain then Mostly Cloudy | 2 mph SSW | 18% |
| Friday | 53°F | Chance Light Rain | 1 to 5 mph SSW | 29% |
| Friday Night | 34°F | Chance Light Rain | 1 to 5 mph SSW | 29% |
| Saturday | 58°F | Slight Chance Light Rain | 1 mph SSE | 16% |
| Saturday Night | 36°F | Mostly Cloudy then Light Rain Likely | 2 mph SE | 68% |
| Sunday | 57°F | Light Rain Likely | 2 to 7 mph SSW | 68% |
| Sunday Night | 35°F | Chance Light Rain | 0 to 5 mph SSW | 27% |
| Monday | 56°F | Mostly Cloudy then Chance Light Rain | 1 mph SSE | 32% |
| Monday Night | 35°F | Chance Light Rain | 1 mph SSW | 32% |
| Tuesday | 58°F | Chance Light Rain | 2 mph SSW | 35% |
Forecast source: National Weather Service (api.weather.gov) for Troy (48.460, -115.891). Updated through the day.
Growing snapshot for Troy
Last spring frost
May 14
First fall frost
Sep 25
Growing season
132 days
Hardiness zone
6a
More local growing data for Troy: 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
Sylvanite
Trego
West Kootenai
White Haven
Yaak
Climate data from the nearest NOAA station, Troy, Mt (12.1 mi from Troy). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.