National Weather Service United States Department of Commerce

On Saturday, severe weather will be possible across portions of the northern Plains while dry and hot conditions begin returning to the West.

Severe weather is possible over parts of the northern Plains on Saturday. During the late afternoon and early evening hours, large hail and isolated tornadoes will be the primary threats with damaging winds becoming the greatest threat in the late evening hours. Out west, hot and dry conditions begin to return bringing increased heat dangers and fire weather concerns.
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Current Conditions

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St Mary MT

7 Day Forecast

For More Weather Information:

Great Falls, MT Local Forecast Office

Today

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

High: 62 °F

Tonight

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

Low: 41 °F

Sunday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 58 °F

Sunday
Night

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

Low: 41 °F

Labor
Day

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

High: 55 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 41 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 60 °F

Tuesday
Night

Slight Chance Showers

Slight Chc
Showers

Low: 40 °F

Wednesday

Chance Thunderstorms

Chance
Thunderstorms

High: 53 °F

Detailed Forecast

  • Today A 20 percent chance of showers after noon. Mostly sunny, with a high near 62. West southwest wind 8 to 16 mph, with gusts as high as 25 mph.
  • Tonight A 20 percent chance of showers before midnight. Partly cloudy, with a low around 41. West southwest wind 11 to 15 mph, with gusts as high as 23 mph.
  • Sunday A 20 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 58. West wind 10 to 13 mph, with gusts as high as 20 mph.
  • Sunday Night A 20 percent chance of showers before midnight. Mostly cloudy, with a low around 41. West southwest wind 11 to 14 mph, with gusts as high as 22 mph.
  • Labor Day A 20 percent chance of showers. Partly sunny, with a high near 55. West southwest wind 11 to 17 mph, with gusts as high as 26 mph.
  • Monday Night Partly cloudy, with a low around 41.
  • Tuesday Mostly sunny, with a high near 60.
  • Tuesday Night A slight chance of showers. Partly cloudy, with a low around 40.
  • Wednesday A chance of showers and thunderstorms. Partly sunny, with a high near 53.
  • Wednesday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 37.
  • Thursday A chance of showers and thunderstorms. Partly sunny, with a high near 54.
  • Thursday Night A chance of showers and thunderstorms. Mostly cloudy, with a low around 39.
  • Friday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 57.