Potomac, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Potomac, a community in Missoula County, Montana.
Tonight
26°F
Mostly Cloudy
Mostly cloudy, with a low around 26. Wind around 0 mph.
7-day forecast for Potomac
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 26°F | Mostly Cloudy | 0 mph | 0% |
| Wednesday | 50°F | Mostly Sunny | 0 mph | 0% |
| Wednesday Night | 25°F | Mostly Clear | 0 mph | 0% |
| Thursday | 46°F | Partly Sunny | 0 to 3 mph SW | 3% |
| Thursday Night | 27°F | Partly Cloudy | 2 mph SW | 1% |
| Friday | 50°F | Mostly Sunny | 0 to 3 mph SW | 4% |
| Friday Night | 30°F | Mostly Cloudy | 3 mph WSW | 4% |
| Saturday | 56°F | Mostly Sunny | 1 mph WSW | 2% |
| Saturday Night | 31°F | Partly Cloudy | 1 mph ENE | 6% |
| Sunday | 58°F | Partly Sunny | 1 to 7 mph SW | 7% |
| Sunday Night | 32°F | Mostly Cloudy | 0 to 3 mph W | 7% |
| Monday | 53°F | Partly Sunny | 0 mph | 9% |
| Monday Night | 32°F | Mostly Cloudy | 0 mph | 9% |
| Tuesday | 55°F | Partly Sunny | 1 mph NW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Potomac (46.881, -113.575). Updated through the day.
Growing snapshot for Potomac
Growing season
45 days
Hardiness zone
5b
More local growing data for Potomac: nearby ZIP 59823 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
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Huson
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Missoula
Orchard Homes
Piltzville
Seeley Lake
Turah
Twin Creeks
Wye
Climate data from the nearest NOAA station, Potomac, Mt (6.6 mi from Potomac). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.