National Weather Service United States Department of Commerce

Rain, mountain snow continue out west; rain and thunderstorms forecast for Southeast and Gulf Coast

Rain and mountain snow are expected across parts of northern California and the Pacific Northwest on Friday. Heavy snow is forecast for the higher mountain elevations over the weekend. Meanwhile, rain and thunderstorms are forecast for parts of the Southeast and Gulf Coast states Friday and Saturday.
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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

Chance Rain/Snow Chance for Measurable Precipitation 40%

Chance
Rain/Snow

Low: -3 °C

Saturday

Mostly Sunny

Mostly
Sunny

High: 6 °C

Saturday
Night

Chance Snow Chance for Measurable Precipitation 40%

Chance
Snow

Low: 0 °CRising Temperatures

Sunday

Chance Rain Chance for Measurable Precipitation 50%

Chance
Rain

High: 8 °C

Sunday
Night

Chance Rain/Snow Chance for Measurable Precipitation 30%

Chance
Rain/Snow

Low: -1 °C

Monday

Chance Rain/Snow Chance for Measurable Precipitation 30%

Chance
Rain/Snow

High: 4 °C

Monday
Night

Slight Chance Snow Chance for Measurable Precipitation 20%

Slight Chc
Snow

Low: -5 °C

Tuesday

Slight Chance Snow

Slight Chc
Snow

High: 4 °C

Tuesday
Night

Chance Snow

Chance
Snow

Low: -4 °C

Detailed Forecast

  • Tonight A chance of rain before 11pm, then a chance of rain and snow. Mostly cloudy, then gradually becoming mostly clear, with a low around -3. West wind 13 to 23 km/h, with gusts as high as 32 km/h. Chance of precipitation is 40%. Total nighttime snow accumulation of less than a half centimeter possible.
  • Saturday Mostly sunny, with a high near 6. West wind 21 to 26 km/h, with gusts as high as 37 km/h.
  • Saturday Night A chance of snow after 11pm. Mostly cloudy, with a temperature rising to around 4 by 5am. South southwest wind 21 to 29 km/h, with gusts as high as 42 km/h. Chance of precipitation is 40%. Little or no snow accumulation expected.
  • Sunday A 50 percent chance of rain. Partly sunny, with a high near 8. West wind 26 to 32 km/h, with gusts as high as 45 km/h.
  • Sunday Night A chance of rain before 11pm, then a chance of snow. Mostly cloudy, with a low around -1. West wind 27 to 29 km/h, with gusts as high as 40 km/h. Chance of precipitation is 30%. New snow accumulation of less than one centimeter possible.
  • Monday A chance of snow before 11am, then a chance of rain and snow. Partly sunny, with a high near 4. Chance of precipitation is 30%. New snow accumulation of less than a half centimeter possible.
  • Monday Night A 20 percent chance of snow. Mostly cloudy, with a low around -5.
  • Tuesday A slight chance of snow. Partly sunny, with a high near 4.
  • Tuesday Night A chance of snow. Mostly cloudy, with a low around -4.
  • Wednesday A chance of snow. Mostly cloudy, with a high near 2.
  • Wednesday Night A chance of snow. Mostly cloudy, with a low around -7.
  • Christmas Day A chance of snow. Cloudy, with a high near -6.
  • Thursday Night A slight chance of snow. Mostly cloudy, with a low around -9.
  • Friday A slight chance of snow. Partly sunny, with a high near -5.