Gallatin County, MT Weather Forecast
County weather hub
Rain Showers Likely
Compare major city weather across Gallatin County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.
Rain showers likely before noon, then showers and thunderstorms likely. Mostly cloudy, with a high near 74. South southwest wind 6 to 12 mph, with gusts as high as 24 mph.
County Weather Overview
This county weather page brings together forecast coverage for Gallatin County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 2 of 2 mapped cities in Gallatin County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Aug 29 to Sep 1, 2026
- Latest sync
- Aug 26, 2026 6:39 AM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Gallatin County
Monday looks like the warmest upcoming period in Gallatin County at 76 degrees F.
Sunday Night is the coolest period ahead with temperatures near 47 degrees F.
The strongest winds are forecast for Saturday Night at about 5 to 13 mph SW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 26, 2026 6:39 AM MDT
- Coverage
- 4 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
Rain showers likely. Mostly cloudy, with a low around 48.
A chance of rain showers. Partly sunny, with a high near 70.
A slight chance of rain showers before midnight. Partly cloudy, with a low around 47.
Sunny, with a high near 76.
A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 51.
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Rain Showers Likely
|
74°F |
6 to 12 mph
SSW
|
|
Saturday Night
Aug 29
|
Rain Showers Likely
|
48°F |
5 to 13 mph
SW
|
|
Sunday
Aug 30
|
Chance Rain Showers
|
70°F |
3 to 9 mph
WSW
|
|
Sunday Night
Aug 30
|
Slight Chance Rain Showers then Partly Cloudy
|
47°F |
8 mph
SSW
|
|
Monday
Aug 31
|
Sunny
|
76°F |
7 mph
SW
|
|
Monday Night
Aug 31
|
Chance Showers And Thunderstorms then Partly Cloudy
|
51°F |
6 to 12 mph
S
|
|
Tuesday
Sep 1
|
Mostly Sunny then Slight Chance Showers And Thunderstorms
|
75°F |
8 mph
SW
|
Major City Forecasts
Live forecast snapshots for major cities across Gallatin County.
Coverage
Forecast coverage currently spans 2 of 2 mapped cities in Gallatin County.
Largest mapped city population in this region: 10,390.
