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Mason Lake, MT Weather Forecast
Mason Lake, MT Weather Forecast Date: 1232 AM MDT Tue Oct 20 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 49 to 59. South winds up to 10 mph.
Tonight... Mostly clear. Lows 32 to 38. Southeast winds up to 10 mph.
Wednesday... Mostly sunny. Highs 50 to 60. South winds up to 15 mph with gusts to around 30 mph.
Wednesday Night... Mostly clear. Lows 35 to 41. South winds 5 to 10 mph with gusts to around 25 mph.
Thursday... Mostly sunny. A 20% chance of rain in the afternoon. Highs 50 to 60. South winds 5 to 15 mph. Gusts up to 25 mph increasing to 35 mph in the afternoon.
Thursday Night... Rain showers likely and slight chance of thunderstorms in the evening, then rain showers and slight chance of thunderstorms after midnight. Lows 33 to 39. Chance of precipitation near 100%.
Friday... Colder. Rain and slight chance of snow in the morning, then rain and snow in the afternoon. Heavy snow accumulations. Highs 37 to 43. Chance of precipitation near 100%.
Friday Night... Colder. Mostly cloudy. Snow and rain likely in the evening, then slight chance of snow after midnight. Moderate snow accumulations. Lows in the mid 20s. Chance of precipitation 70%.
Saturday... Partly cloudy. Highs 33 to 41. Lows 21 to 27.
Saturday Night... Partly cloudy. Highs 33 to 41. Lows 21 to 27.
Sunday... Mostly sunny. Highs 39 to 47.
Sunday Night... Partly cloudy in the evening, then mostly cloudy with a 20% chance of snow after midnight. Lows in the upper 20s.
POP = Probability of Precipitation
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