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Information on 2026 SKYWARN Spotter Training Dates and Times
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

44°F

7°C

Humidity	42%
Wind Speed	SE 4 MPH
Barometer	NA
Dewpoint	22°F (-6°C)
Visibility	NA
Wind Chill	42°F (6°C)
Last update	14 May 04:45 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

Today
High: 67 °F
Sunny
Tonight
Low: 39 °F
Decreasing
Clouds
Friday
High: 64 °F
Sunny
Friday Night
Low: 36 °F
Partly Cloudy
Saturday
High: 64 °F
Partly Sunny
Saturday Night
Low: 31 °F
Showers
Likely then
Rain/Snow
Sunday
High: 44 °F
Snow Showers
then
Rain/Snow
Sunday Night
Low: 27 °F
Snow
Monday
High: 49 °F
Snow Likely

Detailed Forecast

Today

Sunny, with a high near 67. South southeast wind 6 to 13 mph becoming west in the afternoon. Winds could gust as high as 28 mph.

Tonight

Mostly cloudy, then gradually becoming mostly clear, with a low around 39. West wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 25 mph.

Friday

Sunny, with a high near 64. Calm wind becoming west 5 to 9 mph in the morning. Winds could gust as high as 25 mph.

Friday Night

Partly cloudy, with a low around 36. West northwest wind 5 to 7 mph becoming calm in the evening. Winds could gust as high as 21 mph.

Saturday

Partly sunny, with a high near 64. Calm wind becoming southwest 5 to 8 mph in the afternoon. Winds could gust as high as 21 mph.

Saturday Night

Rain showers likely before midnight, then rain and snow showers between midnight and 3am, then snow showers after 3am. Some thunder is also possible. Low around 31. West southwest wind around 6 mph becoming calm in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

Sunday

Snow showers before 3pm, then snow showers, possibly mixed with rain. Some thunder is also possible. High near 44. Calm wind becoming northwest around 5 mph in the afternoon. Chance of precipitation is 90%. New snow accumulation of less than one inch possible.

Sunday Night

Snow. Mostly cloudy, with a low around 27. North northwest wind 5 to 7 mph becoming calm after midnight.

Monday

Snow likely before noon, then snow showers likely after noon. Some thunder is also possible. Mostly cloudy, with a high near 49.

Monday Night

A chance of snow, mainly before midnight. Mostly cloudy, with a low around 25.

Tuesday

A slight chance of rain showers and snow. Some thunder is also possible. Mostly sunny, with a high near 57.

Tuesday Night

A chance of rain and snow. Mostly cloudy, with a low around 31.

Wednesday

A chance of rain and snow. Partly sunny, with a high near 62.