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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 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.

24°F

-4°C

Humidity	75%
Wind Speed	NA 8 MPH
Barometer	NA
Dewpoint	17°F (-8°C)
Visibility	NA
Wind Chill	15°F (-9°C)
Last update	30 Mar 06:10 AM MDT

More Information:

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

Extended Forecast for

St Mary MT

Winter Weather Advisory March 30, 07:06am until March 30, 10:00am

Click here for hazard details and duration

...

Winter Weather Advisory March 30, 07:06am until March 30, 10:00am
NOW until 10:00am Mon
Winter Weather Advisory
Today
High: 34 °F
Snow Likely
Tonight
Low: 16 °F
Slight Chance
Snow then
Partly Cloudy
Tuesday
High: 41 °F
Partly Sunny
Tuesday Night
Low: 24 °F
Partly Cloudy
Wednesday
High: 47 °F
Partly Sunny
Wednesday Night
Low: 31 °F
Rain/Snow
Likely
Thursday
High: 38 °F
Snow
Thursday Night
Low: 25 °F
Snow Likely

Detailed Forecast

Today

Snow likely, mainly between 8am and 9am. Mostly cloudy, with a high near 34. West northwest wind 8 to 10 mph, with gusts as high as 24 mph. Chance of precipitation is 60%. Total daytime snow accumulation of 1 to 2 inches possible.

Tonight

A 20 percent chance of snow before 9pm. Partly cloudy, with a low around 16. North northwest wind 5 to 7 mph becoming light and variable in the evening.

Tuesday

Partly sunny, with a high near 41. South southeast wind 3 to 6 mph.

Tuesday Night

Partly cloudy, with a low around 24. South southeast wind 3 to 6 mph.

Wednesday

Partly sunny, with a high near 47. Southwest wind 3 to 6 mph.

Wednesday Night

Rain and snow likely, becoming all snow after 3am. Mostly cloudy, with a low around 31. South wind around 5 mph becoming light and variable. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

Thursday

Snow. High near 38. North northwest wind 5 to 11 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.

Thursday Night

Snow likely, mainly before midnight. Mostly cloudy, with a low around 25. North northwest wind 9 to 13 mph, with gusts as high as 24 mph.

Friday

A chance of snow, mainly before noon. Mostly sunny, with a high near 43.

Friday Night

A slight chance of rain and snow before 9pm, then a slight chance of snow between 9pm and midnight. Partly cloudy, with a low around 30.

Saturday

Mostly sunny, with a high near 48.

Saturday Night

Partly cloudy, with a low around 34.

Sunday

Mostly sunny, with a high near 51.