Big Sky, MT Weather Forecast
Local 7-day forecast
Rain Showers
Track current conditions, temperature changes, wind, and the full daily outlook for Big Sky, MT in one place.
Rain showers before noon, then showers and thunderstorms. Cloudy, with a high near 57. South southwest wind 3 to 8 mph, with gusts as high as 21 mph. Chance of precipitation is 80%.
Local Weather Overview
This forecast page for Big Sky, 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: Aug 27, 2026 8:33 PM MDT.
The active forecast window currently covers Aug 29 to Sep 3, 2026 for Big Sky, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Aug 29 to Sep 3, 2026
- Latest sync
- Aug 27, 2026 8:33 PM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Big Sky
Tuesday looks like the warmest upcoming period in Big Sky at 63 degrees F.
Sunday Night is the coolest period ahead with temperatures near 39 degrees F.
The strongest winds are forecast for Wednesday at about 7 to 13 mph SSW.
Precipitation is mentioned in 8 upcoming forecast periods.
Forecast Details
- Last updated
- Aug 27, 2026 8:33 PM MDT
- Coverage
- 6 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
Showers and thunderstorms. Mostly cloudy, with a low around 43. South wind around 8 mph, with gusts as high as 21 mph. Chance of precipitation is 90%.
Showers and thunderstorms likely before noon, then a chance of showers and thunderstorms. Mostly cloudy, with a high near 56. Southwest wind 6 to 12 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Mostly clear, with a low around 39. Southwest wind 5 to 10 mph, with gusts as high as 28 mph.
Sunny, with a high near 61. South southwest wind around 7 mph, with gusts as high as 20 mph.
Mostly clear, with a low around 43.
A slight chance of rain showers before noon, then a chance of showers and thunderstorms. Mostly sunny, with a high near 63.
A chance of rain showers before midnight. Mostly cloudy, with a low around 44.
A chance of rain showers after noon. Mostly sunny, with a high near 60.
A slight chance of rain showers before midnight. Mostly cloudy, with a low around 42.
A chance of rain showers. Partly sunny, with a high near 57.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Saturday
Aug 29
|
Rain Showers
|
57°F |
3 to 8 mph
SSW
|
|
Saturday Night
Aug 29
|
Showers And Thunderstorms
|
43°F |
8 mph
S
|
|
Sunday
Aug 30
|
Showers And Thunderstorms Likely then Chance Showers And Thunderstorms
|
56°F |
6 to 12 mph
SW
|
|
Sunday Night
Aug 30
|
Mostly Clear
|
39°F |
5 to 10 mph
SW
|
|
Monday
Aug 31
|
Sunny
|
61°F |
7 mph
SSW
|
|
Monday Night
Aug 31
|
Mostly Clear
|
43°F |
7 mph
S
|
|
Tuesday
Sep 1
|
Chance Showers And Thunderstorms
|
63°F |
5 to 9 mph
S
|
|
Tuesday Night
Sep 1
|
Chance Rain Showers then Mostly Cloudy
|
44°F |
9 mph
SSW
|
|
Wednesday
Sep 2
|
Mostly Sunny then Chance Rain Showers
|
60°F |
7 to 13 mph
SSW
|
|
Wednesday Night
Sep 2
|
Slight Chance Rain Showers then Mostly Cloudy
|
42°F |
8 to 13 mph
SSW
|
|
Thursday
Sep 3
|
Chance Rain Showers
|
57°F |
6 to 12 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Big Sky.