National Weather Service United States Department of Commerce

Warmup expected in the East, cooler weather forecast across parts of West

Much of the eastern U.S. will see a significant warming trend beginning on Friday, with high temperatures as much as 10-15 degrees warmer than on Thursday. The warming trend will continue into the weekend. Meanwhile, temperatures will be on the decrease across much of the northern Plains and Intermountain West over the next several days.
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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

Partly Sunny

Partly
Sunny

High: 10 °C

Tonight

Snow Likely Chance for Measurable Precipitation 60%

Snow
Likely

Low: -16 °C

Saturday

Snow Likely Chance for Measurable Precipitation 70%

Snow
Likely

High: -12 °CFalling Temperatures

Saturday
Night

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

Low: -24 °C

Sunday

Cold

Cold

High: -12 °C

Sunday
Night

Partly Cloudy

Partly
Cloudy

Low: -19 °C

Monday

Mostly Sunny

Mostly
Sunny

High: 1 °C

Monday
Night

Chance Snow

Chance
Snow

Low: -11 °C

Tuesday

Slight Chance Snow

Slight Chc
Snow

High: -1 °C

Detailed Forecast

  • Today Partly sunny, with a high near 10. Southwest wind 26 to 29 km/h, with gusts as high as 40 km/h.
  • Tonight Snow likely after 11pm. Mostly cloudy, with a low around -16. Southwest wind 13 to 16 km/h becoming northwest after midnight. Chance of precipitation is 60%. New snow accumulation of less than a half centimeter possible.
  • Saturday Snow likely. Cloudy and cold, with a temperature falling to around -19 by 5pm. Wind chill values as low as -30. Northwest wind 16 to 26 km/h, with gusts as high as 37 km/h. Chance of precipitation is 70%. New snow accumulation of 2 to 4 centimeters possible.
  • Saturday Night A 40 percent chance of snow. Mostly cloudy, then gradually becoming mostly clear, with a low around -24. Wind chill values as low as -34. West wind 14 to 18 km/h. New snow accumulation of less than one centimeter possible.
  • Sunday Sunny and cold, with a high near -12. West northwest wind 11 to 13 km/h.
  • Sunday Night Partly cloudy, with a low around -19.
  • Monday Mostly sunny, with a high near 1.
  • Monday Night A chance of snow. Mostly cloudy, with a low around -11.
  • Tuesday A slight chance of snow showers. Partly sunny, with a high near -1.
  • Tuesday Night Mostly cloudy, with a low around -11.
  • Wednesday A slight chance of snow showers. Mostly sunny, with a high near 1.
  • Wednesday Night Mostly cloudy, with a low around -6.
  • Thursday Partly sunny, with a high near 3.