Grass Range, MT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Grass Range, MT in one place.
Mostly sunny, with a high near 76. South southeast wind 8 to 16 mph, with gusts as high as 24 mph.
Local Weather Overview
This forecast page for Grass Range, 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: Sep 16, 2026 11:11 PM MDT.
The active forecast window currently covers Sep 17 to Sep 23, 2026 for Grass Range, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Sep 17 to Sep 23, 2026
- Latest sync
- Sep 16, 2026 11:11 PM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Grass Range
Thursday looks like the warmest upcoming period in Grass Range at 76 degrees F.
Sunday Night is the coolest period ahead with temperatures near 50 degrees F.
The strongest winds are forecast for Thursday at about 8 to 16 mph SSE.
Precipitation is mentioned in 5 upcoming forecast periods.
Forecast Details
- Last updated
- Sep 16, 2026 11:11 PM MDT
- Coverage
- 7 days
- Time zone
- America/Denver
- Forecast office
- TFX
- Radar station
- KBLX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Mostly cloudy, with a low around 55. South southwest wind 6 to 10 mph, with gusts as high as 20 mph.
A slight chance of rain after noon. Mostly sunny, with a high near 75. Northwest wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.
Showers and thunderstorms before 3am, then rain. Cloudy, with a low around 53. North northwest wind 6 to 10 mph. Chance of precipitation is 80%.
Showers and thunderstorms. Cloudy, with a high near 65. North northwest wind 7 to 10 mph, with gusts as high as 18 mph. Chance of precipitation is 80%.
Showers and thunderstorms likely before midnight, then a chance of rain. Mostly cloudy, with a low around 51. West northwest wind around 8 mph.
A slight chance of rain. Partly sunny, with a high near 71. North northwest wind 6 to 9 mph.
Mostly clear, with a low around 50.
Sunny, with a high near 76.
Mostly clear, with a low around 52.
Mostly sunny, with a high near 75.
Mostly clear, with a low around 50.
Sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Thursday
Sep 17
|
Mostly Sunny
|
76°F |
8 to 16 mph
SSE
|
|
Thursday Night
Sep 17
|
Mostly Cloudy
|
55°F |
6 to 10 mph
SSW
|
|
Friday
Sep 18
|
Mostly Sunny then Slight Chance Light Rain
|
75°F |
7 to 10 mph
NW
|
|
Friday Night
Sep 18
|
Showers And Thunderstorms
|
53°F |
6 to 10 mph
NNW
|
|
Saturday
Sep 19
|
Showers And Thunderstorms
|
65°F |
7 to 10 mph
NNW
|
|
Saturday Night
Sep 19
|
Showers And Thunderstorms Likely then Chance Light Rain
|
51°F |
8 mph
WNW
|
|
Sunday
Sep 20
|
Slight Chance Light Rain
|
71°F |
6 to 9 mph
NNW
|
|
Sunday Night
Sep 20
|
Mostly Clear
|
50°F |
3 to 8 mph
SSE
|
|
Monday
Sep 21
|
Sunny
|
76°F |
5 to 8 mph
SSW
|
|
Monday Night
Sep 21
|
Mostly Clear
|
52°F |
9 to 13 mph
SSW
|
|
Tuesday
Sep 22
|
Mostly Sunny
|
75°F |
5 to 10 mph
NW
|
|
Tuesday Night
Sep 22
|
Mostly Clear
|
50°F |
8 mph
SSW
|
|
Wednesday
Sep 23
|
Sunny
|
75°F |
6 to 9 mph
W
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Grass Range.