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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

13 Miles ENE Big Sky MT

Tonight
Low: 37 °F
Partly Cloudy
Juneteenth
High: 62 °F
Mostly Cloudy
Friday Night
Low: 46 °F
Mostly Cloudy
Saturday
High: 59 °F
Chance
Showers then
Showers
Saturday Night
Low: 44 °F
Showers then
Chance
Showers
Sunday
High: 57 °F
Chance
Showers then
Showers
Likely
Sunday Night
Low: 40 °F
Chance
T-storms then
Partly Cloudy
Monday
High: 55 °F
Partly Sunny
then Slight
Chance
T-storms
Monday Night
Low: 38 °F
Mostly Clear

Detailed Forecast

Tonight

Partly cloudy, with a low around 37. North wind around 5 mph becoming calm after midnight.

Juneteenth

Mostly cloudy, with a high near 62. Calm wind becoming west northwest 5 to 8 mph in the afternoon.

Friday Night

Mostly cloudy, with a low around 46. North northwest wind 5 to 8 mph becoming south southeast after midnight.

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 59. South wind 5 to 8 mph. Chance of precipitation is 80%.

Saturday Night

Showers and possibly a thunderstorm. Low around 44. West wind around 7 mph. Chance of precipitation is 80%.

Sunday

A chance of showers, then showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 57. West northwest wind 5 to 10 mph. Chance of precipitation is 60%.

Sunday Night

A 40 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 40. Northwest wind 5 to 8 mph becoming calm after midnight.

Monday

A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 55. Light northwest wind becoming north northwest 5 to 10 mph in the morning. Winds could gust as high as 18 mph.

Monday Night

Mostly clear, with a low around 38.

Tuesday

Sunny, with a high near 63.

Tuesday Night

Mostly clear, with a low around 44.

Wednesday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 65.

Wednesday Night

Partly cloudy, with a low around 46.

Thursday

Sunny, with a high near 66.