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

Today

Mostly Sunny

Mostly
Sunny

High: 20 °C

Tonight

Partly Cloudy

Partly
Cloudy

Low: 4 °C

Saturday

Partly Sunny

Partly
Sunny

High: 17 °C

Saturday
Night

Rain Chance for Measurable Precipitation 90%

Rain

Low: 1 °C

Sunday

Rain/Snow Chance for Measurable Precipitation 100%

Rain/Snow

High: 6 °C

Sunday
Night

Chance Rain/Snow Chance for Measurable Precipitation 50%

Chance
Rain/Snow

Low: -2 °C

Monday

Mostly Sunny

Mostly
Sunny

High: 8 °C

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 0 °C

Tuesday

Partly Sunny

Partly
Sunny

High: 13 °C

Detailed Forecast

  • Today Mostly sunny, with a high near 20. South wind 16 to 21 km/h.
  • Tonight Partly cloudy, with a low around 4. South wind 8 to 13 km/h.
  • Saturday Partly sunny, with a high near 17. South wind 5 to 10 km/h becoming east southeast 11 to 16 km/h in the morning.
  • Saturday Night Rain. Low around 1. East northeast wind 11 to 14 km/h becoming west northwest after midnight. Chance of precipitation is 90%.
  • Sunday Snow before noon, then rain and snow. High near 6. West wind 29 to 34 km/h, with gusts as high as 47 km/h. Chance of precipitation is 100%. New snow accumulation of 1 to 3 centimeters possible.
  • Sunday Night A chance of rain and snow showers. Mostly cloudy, with a low around -2. Chance of precipitation is 50%. Little or no snow accumulation expected.
  • Monday Mostly sunny, with a high near 8.
  • Monday Night Partly cloudy, with a low around 0.
  • Tuesday Partly sunny, with a high near 13.
  • Tuesday Night A slight chance of showers. Mostly cloudy, with a low around 3.
  • Wednesday A slight chance of showers. Partly sunny, with a high near 12.
  • Wednesday Night A slight chance of showers. Mostly cloudy, with a low around 3.
  • Thursday Partly sunny, with a high near 17.