Nashua, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nashua, a town in Valley County, Montana.
Today
77°F
Sunny
Sunny, with a high near 77. West northwest wind 9 to 14 mph, with gusts as high as 22 mph.
7-day forecast for Nashua
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Sunny | 9 to 14 mph WNW | 0% |
| Tonight | 51°F | Mostly Clear | 2 to 10 mph SW | 1% |
| Wednesday | 86°F | Partly Sunny | 5 to 14 mph WSW | 0% |
| Wednesday Night | 55°F | Partly Cloudy | 2 to 13 mph N | 0% |
| Thursday | 91°F | Sunny | 2 to 10 mph WNW | 0% |
| Thursday Night | 57°F | Mostly Clear | 7 to 10 mph N | 0% |
| Friday | 90°F | Sunny | 7 mph ESE | 0% |
| Friday Night | 58°F | Mostly Clear | 7 to 13 mph ENE | 0% |
| Saturday | 90°F | Sunny | 12 mph ENE | 0% |
| Saturday Night | 59°F | Partly Cloudy | 8 to 15 mph ENE | 2% |
| Sunday | 90°F | Mostly Sunny | 14 mph ENE | 2% |
| Sunday Night | 59°F | Partly Cloudy | 12 to 16 mph NE | 13% |
| Monday | 87°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 14 mph ENE | 24% |
| Monday Night | 59°F | Partly Cloudy then Chance Showers And Thunderstorms | 16 mph ENE | 26% |
Forecast source: National Weather Service (api.weather.gov) for Nashua (48.134, -106.357). Updated through the day.
Growing snapshot for Nashua
Last spring frost
May 12
First fall frost
Sep 24
Growing season
134 days
Hardiness zone
4a
More local growing data for Nashua: nearby ZIP 59248 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Nashua #2, Mt (9.2 mi from Nashua). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.