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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

68°F

20°C

Humidity	30%
Wind Speed	NW 5 MPH
Barometer	NA
Dewpoint	35°F (2°C)
Visibility	NA
Last update	18 Jun 02:00 PM MDT

More Information:

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

Extended Forecast for

10 Miles ESE Big Sky MT

This Afternoon
High: 57 °F
Sunny
Tonight
Low: 35 °F
Mostly Clear
Juneteenth
High: 62 °F
Decreasing
Clouds
Friday Night
Low: 44 °F
Mostly Cloudy
Saturday
High: 57 °F
Slight Chance
Showers then
Showers
Saturday Night
Low: 41 °F
Showers then
Slight Chance
Showers
Sunday
High: 55 °F
Chance
Showers then
Showers
Likely
Sunday Night
Low: 37 °F
Chance
T-storms then
Partly Cloudy
Monday
High: 54 °F
Mostly Sunny
then Slight
Chance
T-storms

Detailed Forecast

This Afternoon

Sunny, with a high near 57. West wind 15 to 17 mph, with gusts as high as 28 mph.

Tonight

Mostly clear, with a low around 35. West northwest wind 11 to 16 mph becoming light and variable after midnight. Winds could gust as high as 28 mph.

Juneteenth

Mostly cloudy, then gradually becoming sunny, with a high near 62. Light and variable wind becoming west 6 to 11 mph in the morning. Winds could gust as high as 21 mph.

Friday Night

Mostly cloudy, with a low around 44. South southwest wind 5 to 9 mph becoming east northeast in the evening. Winds could gust as high as 20 mph.

Saturday

A slight chance of showers, then showers and possibly a thunderstorm after noon. High near 57. South wind 6 to 9 mph. Chance of precipitation is 80%.

Saturday Night

Showers and possibly a thunderstorm. Low around 41. Southwest wind around 8 mph. Chance of precipitation is 90%.

Sunday

A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 55. West northwest wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 60%.

Sunday Night

A chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 37. North northwest wind 5 to 10 mph.

Monday

A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 54.

Monday Night

Mostly clear, with a low around 35.

Tuesday

Sunny, with a high near 61.

Tuesday Night

Mostly clear, with a low around 41.

Wednesday

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