National Weather Service United States Department of Commerce

Unseasonably cold temperatures spreading into central U.S.

A strong cold front will usher a much colder air mass into the central and eastern U.S. for the end of the work week. Temperatures will be 10 to 20 degrees below average in some areas. Rain and snow will be possible across the Great Lakes on Friday as the system crosses the area. Heavy snow is possible in the central Appalachians Friday night.
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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

Mostly Cloudy

Mostly
Cloudy

Low: 44 °F

Friday

Sunny

Sunny

High: 69 °F

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 39 °F

Saturday

Partly Sunny

Partly
Sunny

High: 61 °F

Saturday
Night

Rain Chance for Measurable Precipitation 90%

Rain

Low: 33 °F

Sunday

Rain/Snow Chance for Measurable Precipitation 100%

Rain/Snow

High: 41 °F

Sunday
Night

Rain/Snow Chance for Measurable Precipitation 100%

Rain/Snow

Low: 29 °F

Monday

Chance Rain/Snow

Chance
Rain/Snow

High: 46 °F

Monday
Night

Slight Chance Showers

Slight Chc
Showers

Low: 31 °F

Detailed Forecast

  • Overnight Mostly cloudy, with a steady temperature around 44. East southeast wind 9 to 11 mph.
  • Friday Sunny, with a high near 69. East southeast wind 7 to 11 mph becoming south southwest in the afternoon.
  • Friday Night Partly cloudy, with a low around 39. South wind 5 to 10 mph.
  • Saturday Partly sunny, with a high near 61. Calm wind becoming east southeast 5 to 8 mph in the afternoon.
  • Saturday Night Rain, mainly after 7pm. Low around 33. East southeast wind 5 to 8 mph becoming light and variable after midnight. Chance of precipitation is 90%.
  • Sunday Rain before 7am, then rain and snow. High near 41. Chance of precipitation is 100%. Little or no snow accumulation expected.
  • Sunday Night Rain and snow, becoming all snow after 7pm. Low around 29. Chance of precipitation is 100%. New snow accumulation of less than one inch possible.
  • Monday A chance of rain and snow showers. Mostly sunny, with a high near 46.
  • Monday Night A slight chance of showers. Partly cloudy, with a low around 31.
  • Tuesday Partly sunny, with a high near 56.
  • Tuesday Night Mostly cloudy, with a low around 38.
  • Wednesday Partly sunny, with a high near 57.
  • Wednesday Night Mostly cloudy, with a low around 38.
  • Thursday Partly sunny, with a high near 60.