National Weather Service

News Headlines

SCN26-50: Discontinuation of the State Forecast Product (SFP) for all NWS Central Region, Southern Region, and Western Region Offices: Effective June 29, 2026
The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will now be discontinued on July 7, 2026.

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

Lat: 45.34534°NLon: 111.17261°WElev: 5699.0ft.

unknown precip

50°F

10°C

Humidity	60%
Wind Speed	SSE 1 MPH
Barometer	NA
Dewpoint	37°F (3°C)
Visibility	NA
Last update	17 Jun 09:15 PM MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

7 Miles NNE Big Sky MT

Tonight
Low: 38 °F
Partly Cloudy
Thursday
High: 59 °F
Sunny
Thursday Night
Low: 40 °F
Increasing
Clouds
Juneteenth
High: 64 °F
Mostly Sunny
Friday Night
Low: 49 °F
Mostly Cloudy
Saturday
High: 57 °F
Chance
Showers then
Showers
Saturday Night
Low: 42 °F
Showers
Likely then
Slight Chance
Showers
Sunday
High: 57 °F
Mostly Sunny
then Chance
T-storms
Sunday Night
Low: 39 °F
Slight Chance
T-storms then
Partly Cloudy

Detailed Forecast

Tonight

Partly cloudy, with a low around 38. Northwest wind 5 to 8 mph becoming calm in the evening.

Thursday

Sunny, with a high near 59. Light west wind becoming west northwest 9 to 14 mph in the morning. Winds could gust as high as 25 mph.

Thursday Night

Increasing clouds, with a low around 40. Northwest wind 6 to 11 mph becoming light north northwest after midnight. Winds could gust as high as 26 mph.

Juneteenth

Mostly sunny, with a high near 64. Light and variable wind becoming northwest 6 to 11 mph in the afternoon. Winds could gust as high as 20 mph.

Friday Night

Mostly cloudy, with a low around 49. Northwest wind 5 to 10 mph becoming light and variable. Winds could gust as high as 20 mph.

Saturday

A chance of showers, then showers and possibly a thunderstorm after noon. High near 57. Light and variable wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 80%.

Saturday Night

Showers likely and possibly a thunderstorm before midnight, then a slight chance of showers. Mostly cloudy, with a low around 42. West wind around 6 mph becoming light and variable after midnight. Chance of precipitation is 70%.

Sunday

A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 57. Calm wind becoming west northwest 5 to 9 mph in the morning. Winds could gust as high as 20 mph.

Sunday Night

A slight chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 39.

Monday

Mostly sunny, with a high near 57.

Monday Night

Mostly clear, with a low around 40.

Tuesday

Sunny, with a high near 64.

Tuesday Night

Mostly clear, with a low around 45.

Wednesday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 66.