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

Hazardous Weather Conditions

Winter Weather Advisory in effect from March 29, 08:00 PM MDT until March 30, 10:00 AM MDT

Current conditions at

USCRN SITE NEAR ST. MARY 1SSW (MRYM8)

Lat: 48.74111°NLon: 113.43306°WElev: 4550.0ft.

33°F

1°C

Humidity	82%
Wind Speed	NA 12 MPH
Barometer	NA
Dewpoint	28°F (-2°C)
Visibility	NA
Wind Chill	24°F (-4°C)
Last update	29 Mar 06:10 PM MDT

More Information:

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

Extended Forecast for

5 Miles WSW St Mary MT

Winter Weather Advisory March 29, 08:00pm until March 30, 10:00am

Click here for hazard details and duration

Winter Weather Advisory

Tonight
Low: 17 °F
Snow and
Blowing Snow
Monday
High: 19 °F
Snow Likely
and Blowing
Snow
Monday Night
Low: 5 °F
Chance Snow
then Partly
Cloudy
Tuesday
High: 27 °F
Mostly Cloudy
Tuesday Night
Low: 16 °F
Mostly Cloudy
Wednesday
High: 34 °F
Partly Sunny
Wednesday Night
Low: 24 °F
Snow Likely
Thursday
High: 27 °F
Snow and
Blustery
Thursday Night
Low: 16 °F
Snow Likely
and Blustery

Detailed Forecast

Tonight

Snow. Widespread blowing snow, mainly after 3am. Low around 17. Windy, with a west southwest wind 26 to 30 mph, with gusts as high as 44 mph. Chance of precipitation is 100%. Total nighttime snow accumulation of 3 to 5 inches possible.

Monday

Snow likely. Widespread blowing snow, mainly before 9am. Mostly cloudy, with a high near 19. Wind chill values as low as zero. Windy, with a west southwest wind 25 to 30 mph becoming north northwest 16 to 21 mph in the afternoon. Winds could gust as high as 41 mph. Chance of precipitation is 70%. New snow accumulation of 3 to 5 inches possible.

Monday Night

A 40 percent chance of snow, mainly before 9pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 5. Wind chill values as low as -5. Northwest wind 7 to 15 mph becoming south in the evening. Winds could gust as high as 26 mph. New snow accumulation of less than one inch possible.

Tuesday

Mostly cloudy, with a high near 27. Wind chill values as low as -5. South southwest wind 7 to 11 mph, with gusts as high as 21 mph.

Tuesday Night

Mostly cloudy, with a low around 16. Southwest wind 9 to 11 mph, with gusts as high as 21 mph.

Wednesday

Partly sunny, with a high near 34. Southwest wind 10 to 13 mph, with gusts as high as 23 mph.

Wednesday Night

Snow likely, mainly after midnight. Mostly cloudy, with a low around 24. Southwest wind 13 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

Thursday

Snow. Cloudy, with a high near 27. Blustery, with a west northwest wind 17 to 26 mph, with gusts as high as 38 mph.

Thursday Night

Snow likely, mainly before midnight. Mostly cloudy, with a low around 16. Blustery.

Friday

A chance of snow. Partly sunny, with a high near 29. Blustery.

Friday Night

A chance of snow. Mostly cloudy, with a low around 19. Blustery.

Saturday

Partly sunny, with a high near 34. Breezy.

Saturday Night

Partly cloudy, with a low around 24. Breezy.