National Weather Service

News Headlines

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.

Hazardous Weather Conditions

Winter Weather Advisory until June 29, 12:00 PM MDT

Current conditions at

Karst US-191 MP 55.3 (MTKAR)

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

unknown precip

43°F

6°C

Humidity	77%
Wind Speed	ESE 5 MPH
Barometer	NA
Dewpoint	36°F (2°C)
Visibility	NA
Wind Chill	40°F (4°C)
Last update	29 Jun 01:15 AM MDT

More Information:

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

Extended Forecast for

4 Miles E Big Sky MT

Winter Weather Advisory June 29, 01:32am until June 29, 12:00pm

Click here for hazard details and duration

Winter Weather Advisory

Winter Weather Advisory June 29, 01:32am until June 29, 12:00pm
NOW until 12:00pm Mon
Winter Weather Advisory
Overnight
Low: 35 °F
Rain
Monday
High: 53 °F
Rain
Monday Night
Low: 38 °F
Rain Likely
then Slight
Chance Rain
Tuesday
High: 69 °F
Partly Sunny
then Chance
T-storms
Tuesday Night
Low: 40 °F
Chance
T-storms then
Partly Cloudy
Wednesday
High: 72 °F
Mostly Sunny
then Showers
Likely
Wednesday Night
Low: 40 °F
Chance
T-storms then
Partly Cloudy
Thursday
High: 75 °F
Mostly Sunny

Detailed Forecast

Overnight

Rain, mainly after 2am. Low around 35. South wind 3 to 5 mph. Chance of precipitation is 90%.

Monday

Rain, with thunderstorms also possible after 3pm. High near 53. South southeast wind around 6 mph becoming southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

Monday Night

Rain likely, mainly before 1am. Mostly cloudy, with a low around 38. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%.

Tuesday

A 50 percent chance of showers and thunderstorms after noon. Increasing clouds, with a high near 69. Calm wind.

Tuesday Night

A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 40. Calm wind. Chance of precipitation is 30%.

Wednesday

Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 72. Calm wind becoming west southwest around 5 mph in the afternoon. Chance of precipitation is 60%.

Wednesday Night

A chance of showers and thunderstorms before 9pm, then a chance of showers between 9pm and midnight. Partly cloudy, with a low around 40. Calm wind. Chance of precipitation is 40%.

Thursday

Mostly sunny, with a high near 75. Calm wind becoming southwest 5 to 7 mph in the afternoon. Winds could gust as high as 20 mph.

Thursday Night

Mostly cloudy, with a low around 44.

Friday

Showers likely and possibly a thunderstorm after noon. Partly sunny, with a high near 74.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 42.

Independence Day

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 75.

Saturday Night

Mostly clear, with a low around 44.