Grass Valley, MT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grass Valley, MT in one place.
Mostly sunny, with a high near 57. Southeast wind around 2 mph.
Local Weather Overview
This forecast page for Grass Valley, MT is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Nov 5, 2026 4:47 PM MST.
The active forecast window currently covers Nov 7 to Nov 11, 2026 for Grass Valley, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Nov 7 to Nov 11, 2026
- Latest sync
- Nov 5, 2026 4:47 PM MST
- Forecast office
- MSO
- Source
- NOAA / NWS
Daily Outlook
This Week in Grass Valley
Veterans Day looks like the warmest upcoming period in Grass Valley at 59 degrees F.
Sunday Night is the coolest period ahead with temperatures near 30 degrees F.
The strongest winds are forecast for Sunday at about 3 to 9 mph SSW.
Precipitation is mentioned in 2 upcoming forecast periods.
Forecast Details
- Last updated
- Nov 5, 2026 4:47 PM MST
- Coverage
- 6 days
- Time zone
- America/Denver
- Forecast office
- MSO
- Radar station
- KMSX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Partly cloudy, with a low around 34.
Partly sunny, with a high near 52.
Areas of fog after 2am. Mostly cloudy, with a low around 30.
Areas of fog before 9am. Partly sunny, with a high near 51.
Areas of fog after 1am. Mostly cloudy, with a low around 33.
Areas of fog before 9am, then a slight chance of rain. Mostly sunny, with a high near 56.
A slight chance of rain before 11pm. Partly cloudy, with a low around 35.
Patchy fog between 7am and 8am. Mostly sunny, with a high near 59.
Partly cloudy, with a low around 36.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Nov 7
|
Mostly Sunny
|
57°F |
2 mph
SE
|
|
Saturday Night
Nov 7
|
Partly Cloudy
|
34°F |
2 to 8 mph
SE
|
|
Sunday
Nov 8
|
Partly Sunny
|
52°F |
3 to 9 mph
SSW
|
|
Sunday Night
Nov 8
|
Mostly Cloudy then Areas Of Fog
|
30°F |
0 to 5 mph
W
|
|
Monday
Nov 9
|
Areas Of Fog then Partly Sunny
|
51°F |
0 mph
|
|
Monday Night
Nov 9
|
Mostly Cloudy then Areas Of Fog
|
33°F |
1 mph
WNW
|
|
Tuesday
Nov 10
|
Slight Chance Light Rain
|
56°F |
1 mph
SW
|
|
Tuesday Night
Nov 10
|
Slight Chance Light Rain then Partly Cloudy
|
35°F |
2 mph
SSW
|
|
Veterans Day
Nov 11
|
Patchy Fog then Mostly Sunny
|
59°F |
1 mph
SSE
|
|
Wednesday Night
Nov 11
|
Partly Cloudy
|
36°F |
0 to 5 mph
SE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grass Valley.