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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

51°F

11°C

Humidity	NA
Wind Speed	SSE 1 MPH
Barometer	NA
Dewpoint	N/A
Visibility	NA
Last update	NA

More Information:

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

Extended Forecast for

12 Miles ENE Big Sky MT

Tonight
Low: 42 °F
Chance
Showers
Sunday
High: 56 °F
Sunny then
Chance
Showers
Sunday Night
Low: 39 °F
Slight Chance
Showers then
Partly Cloudy
Monday
High: 52 °F
Sunny then
Slight Chance
T-storms
Monday Night
Low: 35 °F
Mostly Clear
Tuesday
High: 59 °F
Sunny
Tuesday Night
Low: 40 °F
Mostly Clear
Wednesday
High: 62 °F
Sunny then
Slight Chance
T-storms
Wednesday Night
Low: 43 °F
Partly Cloudy

Detailed Forecast

Tonight

A chance of showers and thunderstorms before 3am, then a slight chance of showers between 3am and 4am. Cloudy, then gradually becoming partly cloudy, with a low around 42. West northwest wind around 8 mph. Chance of precipitation is 50%.

Sunday

A slight chance of showers, then a chance of showers and thunderstorms after 3pm. Sunny, with a high near 56. West wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

Sunday Night

A slight chance of showers between 9pm and 11pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 39. West wind 5 to 9 mph becoming north in the evening. Winds could gust as high as 18 mph. Chance of precipitation is 20%.

Monday

A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 52. North northwest wind 5 to 13 mph, with gusts as high as 21 mph.

Monday Night

Mostly clear, with a low around 35. North northwest wind 8 to 13 mph becoming light west northwest after midnight. Winds could gust as high as 21 mph.

Tuesday

Sunny, with a high near 59. South southwest wind 5 to 10 mph becoming northeast in the morning. Winds could gust as high as 18 mph.

Tuesday Night

Mostly clear, with a low around 40. North wind 6 to 11 mph becoming light and variable. Winds could gust as high as 20 mph.

Wednesday

A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 62. Light and variable wind becoming west northwest 8 to 13 mph in the afternoon. Winds could gust as high as 23 mph.

Wednesday Night

Partly cloudy, with a low around 43.

Thursday

A chance of showers and thunderstorms after noon. Mostly sunny, with a high near 64.

Thursday Night

Partly cloudy, with a low around 46.

Friday

Mostly sunny, with a high near 65.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 45.

Saturday

Showers likely and possibly a thunderstorm. Partly sunny, with a high near 55.