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 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

Overnight

Partly Cloudy

Partly
Cloudy

Low: 4 °C

Saturday

Partly Sunny

Partly
Sunny

High: 18 °C

Saturday
Night

Rain Chance for Measurable Precipitation 80%

Rain

Low: 1 °C

Sunday

Rain Chance for Measurable Precipitation 100%

Rain

High: 4 °C

Sunday
Night

Chance Rain/Snow Chance for Measurable Precipitation 50%

Chance
Rain/Snow

Low: -3 °C

Monday

Mostly Sunny

Mostly
Sunny

High: 7 °C

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 0 °C

Tuesday

Partly Sunny

Partly
Sunny

High: 13 °C

Tuesday
Night

Slight Chance Showers

Slight Chc
Showers

Low: 3 °C

Detailed Forecast

  • Overnight Partly cloudy, with a low around 4. South southeast wind around 11 km/h.
  • Saturday Partly sunny, with a high near 18. East southeast wind 11 to 14 km/h.
  • Saturday Night Rain. Low around 1. East wind 10 to 13 km/h becoming west after midnight. Chance of precipitation is 80%. New precipitation amounts between 2.5 and 5 mm possible.
  • Sunday Rain. High near 4. Breezy, with a west northwest wind 32 to 35 km/h, with gusts as high as 48 km/h. Chance of precipitation is 100%.
  • Sunday Night A chance of rain and snow showers. Mostly cloudy, with a low around -3. West wind 13 to 18 km/h. Chance of precipitation is 50%. Little or no snow accumulation expected.
  • Monday Mostly sunny, with a high near 7.
  • 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 14.
  • Wednesday Night A slight chance of showers. Mostly cloudy, with a low around 3.
  • Thursday Partly sunny, with a high near 16.
  • Thursday Night Partly cloudy, with a low around 3.
  • Friday Mostly sunny, with a high near 14.