National Weather Service United States Department of Commerce

Unsettled weather in store for eastern U.S. into weekend

A complex weather system moving across the eastern U.S. will bring a variety of hazardous weather to the region on Friday and into the weekend. Much colder weather is expected by Saturday, along with numerous showers and accumulating snow in the higher elevations of the Appalachians. Rain and snow will move into northern New England on Sunday.
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Current Conditions

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Lewistown MT

7 Day Forecast

For More Weather Information:

Great Falls, MT Local Forecast Office

Tonight

Partly Cloudy

Partly
Cloudy

Low: 40 °F

Saturday

Partly Sunny

Partly
Sunny

High: 65 °F

Saturday
Night

Rain Chance for Measurable Precipitation 80%

Rain

Low: 33 °F

Sunday

Rain Chance for Measurable Precipitation 100%

Rain

High: 39 °F

Sunday
Night

Chance Rain/Snow Chance for Measurable Precipitation 50%

Chance
Rain/Snow

Low: 27 °F

Monday

Mostly Sunny

Mostly
Sunny

High: 45 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 32 °F

Tuesday

Partly Sunny

Partly
Sunny

High: 55 °F

Tuesday
Night

Slight Chance Showers

Slight Chc
Showers

Low: 37 °F

Detailed Forecast

  • Tonight Partly cloudy, with a low around 40. South southeast wind 6 to 8 mph.
  • Saturday Partly sunny, with a high near 65. East southeast wind 7 to 9 mph.
  • Saturday Night Rain. Low around 33. East wind 6 to 8 mph becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
  • Sunday Rain. High near 39. Breezy, with a west northwest wind 20 to 22 mph, with gusts as high as 30 mph. Chance of precipitation is 100%.
  • Sunday Night A chance of rain and snow showers. Mostly cloudy, with a low around 27. West wind 8 to 11 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
  • Monday Mostly sunny, with a high near 45.
  • Monday Night Partly cloudy, with a low around 32.
  • Tuesday Partly sunny, with a high near 55.
  • Tuesday Night A slight chance of showers. Mostly cloudy, with a low around 37.
  • Wednesday A slight chance of showers. Partly sunny, with a high near 57.
  • Wednesday Night A slight chance of showers. Mostly cloudy, with a low around 38.
  • Thursday Partly sunny, with a high near 61.
  • Thursday Night Partly cloudy, with a low around 38.
  • Friday Mostly sunny, with a high near 57.