Troy, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Troy, a city in Lincoln County, Montana.
Tonight
48°F
Mostly Clear
Mostly clear, with a low around 48. Wind around 0 mph.
7-day forecast for Troy
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Mostly Clear | 0 mph | 0% |
| Saturday | 85°F | Sunny | 2 mph ENE | 1% |
| Saturday Night | 48°F | Partly Cloudy | 0 mph | 0% |
| Sunday | 85°F | Patchy Fog then Sunny | 2 mph NW | 0% |
| Sunday Night | 48°F | Clear | 2 mph WSW | 0% |
| Monday | 85°F | Sunny | 0 to 3 mph WSW | 0% |
| Monday Night | 49°F | Mostly Clear | 2 mph W | 0% |
| Tuesday | 83°F | Mostly Sunny | 2 mph SSW | 0% |
| Tuesday Night | 48°F | Partly Cloudy | 2 mph SW | 1% |
| Wednesday | 78°F | Mostly Sunny | 0 to 5 mph SW | 1% |
| Wednesday Night | 47°F | Partly Cloudy | 2 mph W | 0% |
| Thursday | 82°F | Mostly Sunny | 1 mph SSE | 1% |
| Thursday Night | 49°F | Partly Cloudy | 1 mph WSW | 5% |
| Friday | 79°F | Partly Sunny | 0 to 3 mph SSW | 9% |
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
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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 Sep 19, 2026.