Granite County, MT Weather Forecast
County weather hub
Mostly Sunny then Showers And Thunderstorms Likely
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Showers and thunderstorms likely after noon. Mostly sunny, with a high near 84. Chance of precipitation is 70%. New rainfall amounts less than a tenth of an inch possible.
County Weather Overview
This county weather page brings together forecast coverage for Granite County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.
Current forecast coverage spans 0 of 0 mapped cities in Granite County.
Page Snapshot
- Page focus
- county weather
- Forecast window
- Jul 17 to Jul 21, 2026
- Latest sync
- Jul 15, 2026 6:44 AM MDT
- Forecast office
- MSO
- Source
- NOAA / NWS
Daily Outlook
This Week in Granite County
Friday looks like the warmest upcoming period in Granite County at 84 degrees F.
Saturday Night is the coolest period ahead with temperatures near 56 degrees F.
The strongest winds are forecast for Saturday at about 1 to 10 mph WSW.
Precipitation is mentioned in 6 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 15, 2026 6:44 AM MDT
- Coverage
- 5 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
A chance of showers and thunderstorms before 9pm, then a chance of rain between 9pm and midnight. Partly cloudy, with a low around 57. New rainfall amounts less than a tenth of an inch possible.
A slight chance of showers and thunderstorms after noon. Sunny, with a high near 83.
A slight chance of rain before midnight. Partly cloudy, with a low around 56.
Sunny, with a high near 81.
Partly cloudy, with a low around 57.
Mostly sunny, with a high near 80.
A chance of showers and thunderstorms before midnight, then a slight chance of rain. Mostly cloudy, with a low around 58.
A chance of rain before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 75.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Friday
Jul 17
|
Mostly Sunny then Showers And Thunderstorms Likely
|
84°F |
0 to 5 mph
WSW
|
|
Friday Night
Jul 17
|
Chance Showers And Thunderstorms then Partly Cloudy
|
57°F |
1 to 5 mph
SSW
|
|
Saturday
Jul 18
|
Sunny then Slight Chance Showers And Thunderstorms
|
83°F |
1 to 10 mph
WSW
|
|
Saturday Night
Jul 18
|
Slight Chance Light Rain then Partly Cloudy
|
56°F |
1 to 10 mph
WSW
|
|
Sunday
Jul 19
|
Sunny
|
81°F |
1 to 9 mph
WSW
|
|
Sunday Night
Jul 19
|
Partly Cloudy
|
57°F |
1 to 9 mph
NE
|
|
Monday
Jul 20
|
Mostly Sunny
|
80°F |
0 to 7 mph
NE
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms then Slight Chance Light Rain
|
58°F |
2 to 8 mph
E
|
|
Tuesday
Jul 21
|
Chance Light Rain then Chance Showers And Thunderstorms
|
75°F |
2 to 6 mph
ENE
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Granite County.
Nearby forecast pages are not available for this location yet.
Coverage
Forecast coverage currently spans 0 of 0 mapped cities in Granite County.
