National Weather Service United States Department of Commerce

Rain Spreads Across the Eastern U.S. as Snow Moves Into the Great Lake States

Strong low pressure will move from the south to the Great Lake States Monday and Tuesday. A warm front will spread rain along the eastern seaboard while snow moves into the Great Lake States. Heavy snow is also expected across the northern Rocky Mountains and higher elevations of the Pacific Northwest.
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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

Late
Afternoon

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

High: 30 °F

Tonight

Snow Likely Chance for Measurable Precipitation 60%

Snow
Likely

Low: 26 °F

Monday

Chance Snow Chance for Measurable Precipitation 30%

Chance
Snow

High: 33 °F

Monday
Night

Chance Snow Chance for Measurable Precipitation 50%

Chance
Snow

Low: 28 °F

Tuesday

Snow Likely Chance for Measurable Precipitation 70%

Snow
Likely

High: 35 °F

Tuesday
Night

Snow Chance for Measurable Precipitation 90%

Snow

Low: 26 °F

Wednesday

Snow Chance for Measurable Precipitation 90%

Snow

High: 34 °F

Wednesday
Night

Chance Snow

Chance
Snow

Low: 22 °F

Thanksgiving
Day

Chance Snow

Chance
Snow

High: 33 °F

Detailed Forecast

  • Late Afternoon Scattered snow showers. Mostly cloudy, with a steady temperature around 30. West southwest wind around 21 mph, with gusts as high as 29 mph. Chance of precipitation is 40%. Total daytime snow accumulation of less than a half inch possible.
  • Tonight Snow showers likely, mainly before 11pm. Mostly cloudy, with a low around 26. West wind 11 to 20 mph, with gusts as high as 28 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
  • Monday A 30 percent chance of snow, mainly before 11am. Partly sunny, with a high near 33. West southwest wind 11 to 16 mph, with gusts as high as 22 mph. New snow accumulation of less than a half inch possible.
  • Monday Night A 50 percent chance of snow. Mostly cloudy, with a low around 28. West southwest wind 14 to 21 mph, with gusts as high as 30 mph. New snow accumulation of less than one inch possible.
  • Tuesday Snow showers likely. Cloudy, with a high near 35. West wind 9 to 11 mph. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
  • Tuesday Night Snow showers. Low around 26. Chance of precipitation is 90%. New snow accumulation of 3 to 5 inches possible.
  • Wednesday Snow showers. High near 34. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
  • Wednesday Night A chance of snow. Mostly cloudy, with a low around 22.
  • Thanksgiving Day A chance of snow. Partly sunny, with a high near 33.
  • Thursday Night A chance of snow. Mostly cloudy, with a low around 17.
  • Friday A chance of snow. Partly sunny, with a high near 17.
  • Friday Night A chance of snow. Mostly cloudy, with a low around -4.
  • Saturday A chance of snow. Partly sunny and cold, with a high near 10.
  • Saturday Night A chance of snow. Mostly cloudy, with a low around -5.
  • Sunday A chance of snow. Partly sunny, with a high near 12.