Nashua, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Nashua, a town in Valley County, Montana.
This Afternoon
48°F
Sunny
Sunny. High near 48, with temperatures falling to around 44 in the afternoon. Southeast wind around 5 mph.
7-day forecast for Nashua
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 48°F | Sunny | 5 mph SE | 0% |
| Tonight | 29°F | Patchy Fog | 5 mph E | 0% |
| Wednesday | 48°F | Patchy Fog then Mostly Sunny | 1 to 5 mph NW | 0% |
| Wednesday Night | 29°F | Mostly Cloudy | 1 to 5 mph NE | 0% |
| Thursday | 52°F | Mostly Sunny | 3 to 8 mph SSE | 0% |
| Thursday Night | 32°F | Partly Cloudy | 6 mph WSW | 1% |
| Friday | 53°F | Sunny | 5 to 10 mph WSW | 4% |
| Friday Night | 35°F | Partly Cloudy | 7 to 10 mph WSW | 6% |
| Saturday | 56°F | Sunny | 6 to 14 mph WSW | 2% |
| Saturday Night | 33°F | Mostly Clear | 6 mph S | 0% |
| Sunday | 62°F | Mostly Sunny | 8 mph SSW | 1% |
| Sunday Night | 37°F | Partly Cloudy | 8 to 15 mph W | 0% |
| Monday | 54°F | Mostly Sunny | 3 to 12 mph W | 1% |
| Monday Night | 33°F | Partly Cloudy | 5 mph S | 1% |
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 Nov 4, 2026.