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Big Sky, MT Weather Forecast


Big Sky, MT Weather Forecast Dated: 1224 PM Fri Sep 11 2026
Expect a cool pattern with a mix of sun and clouds and frequent chances of rain over the coming period. moderate humidity and no major pressure swings will dominate.
Friday, September 11, 2026
Mid-Morning
55°F 13°C
Scattered Showers
Mid-Afternoon
64°F 18°C
Overcast
Early-Evening
49°F 10°C
Nearby Thunderstorms
Refreshing around 64°F 18°C, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure rising. Winds turning from the WSW to the NNE at 7 mph 10 km/h.
Saturday, September 12, 2026
Mid-Morning
44°F 7°C
Cloudy
Mid-Afternoon
66°F 19°C
Overcast
Early-Evening
49°F 10°C
Overcast
Mildly cool near 66°F 19°C, cloudy in the morning, becoming overcast through the afternoon and evening, with lower humidity and barometric pressure falling. Winds switching from the SE to the ENE at 6 mph 10 km/h.
Sunday, September 13, 2026
Mid-Morning
44°F 7°C
Cloudy
Mid-Afternoon
53°F 12°C
Sunny
Early-Evening
44°F 7°C
Overcast
Chilly near 53°F 12°C, overcast in the morning, sunny in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds moving from the SE to the WSW at 12 mph 19 km/h. Gusts up to 22 mph 35 km/h.
Monday, September 14, 2026
Mid-Morning
38°F 3°C
Sunny
Mid-Afternoon
54°F 12°C
Sunny
Early-Evening
45°F 8°C
Sunny
Crisp with a high near 54°F 12°C, sunny through the afternoon, turning cloudy this evening, with lower humidity and steady pressure. Winds swinging from the SSW to the NNW at 6 mph 10 km/h.
Tuesday, September 15, 2026
Mid-Morning
41°F 5°C
Sunny
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
50°F 11°C
Sunny
Refreshing around 61°F 16°C, sunny throughout the day, with lower humidity and barometric pressure falling. Winds shifting from the NE to the S at 6 mph 10 km/h.
Wednesday, September 16, 2026
Mid-Morning
39°F 4°C
Overcast
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
49°F 9°C
Sunny
Mildly cool near 61°F 16°C, overcast in the morning, becoming sunny through the afternoon and evening, with lower humidity and steady pressure.
Thursday, September 17, 2026
Mid-Morning
50°F 10°C
Sunny
Mid-Afternoon
69°F 21°C
Sunny
Early-Evening
57°F 14°C
Sunny
Comfortable with temperatures reaching 69°F 21°C, sunny throughout the day, with lower humidity and steady pressure. Winds turning from the S to the WNW at 6 mph 9 km/h.
Friday, September 18, 2026
Mid-Morning
55°F 13°C
Sunny
Mid-Afternoon
71°F 22°C
Sunny
Early-Evening
60°F 15°C
Sunny
Enjoyable around 71°F 22°C, sunny through the afternoon, turning partly cloudy this evening, with steady humidity and barometric pressure falling.
Saturday, September 19, 2026
Mid-Morning
59°F 15°C
Sunny
Mid-Afternoon
77°F 25°C
Overcast
Early-Evening
64°F 18°C
Overcast
Mild temperatures up to 77°F 25°C, sunny in the morning, overcast in the afternoon, and cloudy this evening, with steady humidity and barometric pressure falling.
Sunday, September 20, 2026
Mid-Morning
54°F 12°C
Drizzle
Mid-Afternoon
60°F 15°C
Light Showers
Early-Evening
53°F 12°C
Scattered Showers
Mildly cool near 60°F 15°C, periods of heavy rain and gusty conditions, with increasing humidity and barometric pressure falling.
Monday, September 21, 2026
Mid-Morning
49°F 9°C
Partly Cloudy
Mid-Afternoon
61°F 16°C
Sunny
Early-Evening
52°F 11°C
Sunny
Comfortable at 61°F 16°C, partly cloudy in the morning, sunny in the afternoon, and cloudy this evening, with lower humidity and steady pressure. Winds switching from the W to the WNW at 7 mph 12 km/h.
Tuesday, September 22, 2026
Mid-Morning
37°F 3°C
Heavy Snow Showers
Mid-Afternoon
43°F 6°C
Light Showers
Early-Evening
37°F 3°C
Nearby Thunderstorms
Cold with a high near 43°F 6°C, blowing snow reducing visibility at times, with steady humidity and steady pressure. Snow accumulation up to 2 in. up to 5 cm.
Wednesday, September 23, 2026
Mid-Morning
28°F -2°C
Heavy Snow Showers
Mid-Afternoon
32°F 0°C
Heavy Snow Showers
Early-Evening
26°F -4°C
Heavy Snow Showers
Nippy around 32°F 0°C, rounds of snow expected off and on all day, with steady humidity and steady pressure. New snow accumulation of 4 to 7 in. 10 to 18 cm.
Thursday, September 24, 2026
Mid-Morning
21°F -6°C
Heavy Snow Showers
Mid-Afternoon
26°F -3°C
Heavy Snow Showers
Early-Evening
25°F -4°C
Heavy Snow Showers
Freezing temperatures near 26°F -3°C, persistent snow off and on through the day, with steady humidity and steady pressure. New snow accumulation of 6 to 9 in. 15 to 23 cm.
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