National Weather Service

News Headlines

The Regional Temperatures and Precipitation Product for the State of Montana (RTPMT) will be discontinued on May 6, 2026.

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

34°F

1°C

Humidity	80%
Wind Speed	NW 4 MPH
Barometer	NA
Dewpoint	28°F (-2°C)
Visibility	NA
Wind Chill	30°F (-1°C)
Last update	03 Apr 11:45 AM MDT

More Information:

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

Extended Forecast for

13 Miles ESE Big Sky MT

This Afternoon
High: 27 °F
Chance Snow
Tonight
Low: 18 °F
Partly Cloudy
Saturday
High: 37 °F
Sunny
Saturday Night
Low: 23 °F
Mostly Clear
Sunday
High: 43 °F
Sunny
Sunday Night
Low: 27 °F
Partly Cloudy
Monday
High: 45 °F
Mostly Sunny
Monday Night
Low: 30 °F
Partly Cloudy
Tuesday
High: 45 °F
Mostly Sunny
then Slight
Chance Snow
and Breezy

Detailed Forecast

This Afternoon

A 30 percent chance of snow, mainly before 3pm. Partly sunny, with a high near 27. Northwest wind 17 to 20 mph, with gusts as high as 30 mph. Total daytime snow accumulation of 2 to 4 inches possible.

Tonight

Partly cloudy, with a low around 18. West wind 14 to 17 mph, with gusts as high as 24 mph.

Saturday

Sunny, with a high near 37. West southwest wind around 17 mph, with gusts as high as 24 mph.

Saturday Night

Mostly clear, with a low around 23. West southwest wind 14 to 16 mph, with gusts as high as 23 mph.

Sunday

Sunny, with a high near 43. Southwest wind 10 to 14 mph, with gusts as high as 20 mph.

Sunday Night

Partly cloudy, with a low around 27. West wind 10 to 13 mph becoming south southwest after midnight.

Monday

Mostly sunny, with a high near 45. South southwest wind 10 to 14 mph, with gusts as high as 23 mph.