Big Sky, MT Weather Forecast
Local 7-day forecast
Mostly Sunny
Track current conditions, temperature changes, wind, and the full daily outlook for Big Sky, MT in one place.
Mostly sunny, with a high near 36. West northwest wind around 3 mph.
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: Oct 12, 2026 2:17 AM MDT.
The active forecast window currently covers Oct 13 to Oct 18, 2026 for Big Sky, MT.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Oct 13 to Oct 18, 2026
- Latest sync
- Oct 12, 2026 2:17 AM MDT
- Forecast office
- TFX
- Source
- NOAA / NWS
Daily Outlook
This Week in Big Sky
Saturday looks like the warmest upcoming period in Big Sky at 53 degrees F.
Tuesday Night is the coolest period ahead with temperatures near 21 degrees F.
The strongest winds are forecast for Friday Night at about 3 to 9 mph SSW.
The forecast from Oct 13 through Oct 18 stays mostly dry.
Forecast Details
- Last updated
- Oct 12, 2026 2:17 AM 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
Mostly clear, with a low around 21. South southwest wind around 3 mph.
Sunny, with a high near 42. Southwest wind around 3 mph.
Mostly clear, with a low around 26. Southwest wind around 5 mph.
Sunny, with a high near 44. West northwest wind around 2 mph.
Mostly clear, with a low around 27.
Sunny, with a high near 52.
Mostly clear, with a low around 32.
Sunny, with a high near 53.
Mostly clear, with a low around 33.
Sunny, with a high near 53.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Tuesday
Oct 13
|
Mostly Sunny
|
36°F |
3 mph
WNW
|
|
Tuesday Night
Oct 13
|
Mostly Clear
|
21°F |
3 mph
SSW
|
|
Wednesday
Oct 14
|
Sunny
|
42°F |
3 mph
SW
|
|
Wednesday Night
Oct 14
|
Mostly Clear
|
26°F |
5 mph
SW
|
|
Thursday
Oct 15
|
Sunny
|
44°F |
2 mph
WNW
|
|
Thursday Night
Oct 15
|
Mostly Clear
|
27°F |
3 mph
ESE
|
|
Friday
Oct 16
|
Sunny
|
52°F |
3 mph
SSW
|
|
Friday Night
Oct 16
|
Mostly Clear
|
32°F |
3 to 9 mph
SSW
|
|
Saturday
Oct 17
|
Sunny
|
53°F |
7 mph
SSW
|
|
Saturday Night
Oct 17
|
Mostly Clear
|
33°F |
6 to 9 mph
S
|
|
Sunday
Oct 18
|
Sunny
|
53°F |
6 mph
SSW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Big Sky.