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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

54°F

12°C

Humidity	61%
Wind Speed	SSE 0 MPH
Barometer	NA
Dewpoint	41°F (5°C)
Visibility	NA
Last update	18 Jun 11:00 PM MDT

More Information:

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

Extended Forecast for

5 Miles NNE Big Sky MT

Tonight
Low: 34 °F
Mostly Clear
Juneteenth
High: 60 °F
Partly Sunny
Friday Night
Low: 44 °F
Mostly Cloudy
Saturday
High: 57 °F
Chance
Showers then
Showers
Saturday Night
Low: 41 °F
Showers then
Chance
Showers
Sunday
High: 55 °F
Chance
Showers then
Chance
T-storms
Sunday Night
Low: 36 °F
Chance
Showers then
Partly Cloudy
Monday
High: 53 °F
Mostly Sunny
then Slight
Chance
T-storms
Monday Night
Low: 35 °F
Mostly Clear

Detailed Forecast

Tonight

Mostly clear, with a low around 34. Northwest wind 5 to 7 mph.

Juneteenth

Partly sunny, with a high near 60. West northwest wind 5 to 13 mph becoming south in the morning. Winds could gust as high as 20 mph.

Friday Night

Mostly cloudy, with a low around 44. West northwest wind 6 to 11 mph becoming south in the evening. Winds could gust as high as 20 mph.

Saturday

A chance of showers before noon, then a slight chance of showers and thunderstorms between noon and 1pm, then showers and possibly a thunderstorm after 1pm. High near 57. Southwest wind 7 to 10 mph. Chance of precipitation is 80%.

Saturday Night

Showers and possibly a thunderstorm. Low around 41. West wind 6 to 8 mph. Chance of precipitation is 90%.

Sunday

A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 55. West northwest wind 5 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 50%.

Sunday Night

A 30 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 36. Northwest wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 21 mph.

Monday

A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 53. Light west northwest wind becoming northwest 5 to 10 mph in the morning. Winds could gust as high as 22 mph.

Monday Night

Mostly clear, with a low around 35.

Tuesday

Sunny, with a high near 63.

Tuesday Night

Mostly clear, with a low around 41.

Wednesday

A slight chance of showers and thunderstorms. Sunny, with a high near 63.

Wednesday Night

Partly cloudy, with a low around 42.

Thursday

Sunny, with a high near 64.