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Big Sky, MT Weather Forecast
Big Sky, MT Weather Forecast Date: 336 AM MDT Sat Sep 12 2026
The area/counties/county of: Gallatin And Madison County Mountains And Centennial Mountains, including the cities of: Big Sky, West Yellowstone, Targhee Pass, and Raynolds Pass.or toggle through each period.
Today... Mostly sunny. Highs 59 to 69. Southwest winds up to 5 mph with gusts to around 20 mph increasing to 5 to 15 mph with gusts to around 30 mph in the afternoon.
Tonight... Mostly cloudy in the evening then becoming partly cloudy. Lows 38 to 44. Southeast winds 5 to 10 mph with gusts to around 30 mph.
Sunday... Windy. Partly sunny in the morning then clearing. Highs 56 to 68. Southeast winds 5 to 15 mph with gusts to around 45 mph increasing to south 20 to 30 mph with gusts to around 55 mph in the afternoon.
Sunday Night... Breezy, colder. Mostly clear. Chance of rain showers in the evening, then slight chance of rain showers and snow showers after midnight. Lows 31 to 37. Southwest winds 15 to 25 mph with gusts to around 55 mph Decreasing to 5 to 15 mph with gusts to around 35 mph after midnight. Chance of precipitation 40%.
Monday... Sunny. Highs 49 to 59. Southwest winds 5 to 15 mph with gusts to around 40 mph.
Monday Night... Mostly clear. Lows 30 to 36. Highs 54 to 64.
Tuesday... Mostly clear. Lows 30 to 36. Highs 54 to 64.
Tuesday Night... Partly cloudy. Lows 32 to 38.
Wednesday... Mostly clear. Highs 53 to 65. Lows 34 to 40.
Wednesday Night... Mostly clear. Highs 53 to 65. Lows 34 to 40.
Thursday... Mostly clear. Highs 60 to 70. Lows 38 to 44.
Thursday Night... Mostly clear. Highs 60 to 70. Lows 38 to 44.
POP = Probability of Precipitation
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