7-Day Forecast 45.28°N 111.32°W (Text-Only)
NWS Forecast for: Big Sky MT
Issued by: National Weather Service Great Falls, MT
Last Update: 2:23 pm MDT Jul 14, 2025


This Afternoon: A 20 percent chance of showers and thunderstorms after 4pm. Mostly sunny, with a high near 86. West southwest wind around 7 mph, with gusts as high as 18 mph.

Tonight: A 40 percent chance of showers and thunderstorms, mainly before 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 50. Southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 18 mph.

Tuesday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. Patchy fog between 7am and 9am. High near 75. Calm wind becoming northwest around 6 mph in the afternoon. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Tuesday Night: Showers and possibly a thunderstorm before midnight, then a chance of showers. Patchy fog after 4am. Low around 44. North northeast wind around 6 mph becoming calm after midnight. Chance of precipitation is 80%.

Wednesday: A chance of showers, with thunderstorms also possible after 3pm. Areas of fog before 10am. Otherwise, partly sunny, with a high near 75. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 30%.

Wednesday Night: Mostly clear, with a low around 45. North northwest wind around 5 mph becoming calm in the evening.

Thursday: Sunny, with a high near 84. Calm wind becoming west 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.

Thursday Night: Mostly clear, with a low around 47. West wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 21 mph.

Friday: A slight chance of showers after noon. Sunny, with a high near 83.

Friday Night: Partly cloudy, with a low around 49.

Saturday: Sunny, with a high near 85.

Saturday Night: Mostly clear, with a low around 51.

Sunday: Mostly sunny, with a high near 85.

Sunday Night: Partly cloudy, with a low around 49.

Monday: Mostly sunny, with a high near 81.



Big Sky MT
 45.28°N 111.32°W (Elev. 6752 ft)

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