National Weather Service United States Department of Commerce

Wet weather continues across Pacific Northwest and New England

Two developing storm systems will bring heavy rain to opposite coasts of the U.S. on Wednesday, one affecting the Pacific Northwest and northern California and the other New England. There is a risk of flash flooding across both areas, with 2-4 inches of rainfall, with isolated higher amounts, possible by Thursday morning.
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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

Sunny

Sunny

High: 59 °F

Tonight

Mostly Clear

Mostly
Clear

Low: 38 °F

Thursday

Mostly Sunny

Mostly
Sunny

High: 66 °F

Thursday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 42 °F

Friday

Mostly Sunny

Mostly
Sunny

High: 59 °F

Friday
Night

Partly Cloudy

Partly
Cloudy

Low: 39 °F

Saturday

Mostly Sunny

Mostly
Sunny

High: 65 °F

Saturday
Night

Partly Cloudy

Partly
Cloudy

Low: 41 °F

Sunday

Slight Chance Showers

Slight Chc
Showers

High: 55 °F

Detailed Forecast

  • Today Sunny, with a high near 59. West southwest wind 8 to 10 mph.
  • Tonight Mostly clear, with a low around 38. West southwest wind 6 to 9 mph becoming south in the evening.
  • Thursday Mostly sunny, with a high near 66. South southwest wind 6 to 11 mph.
  • Thursday Night Mostly cloudy, with a low around 42. West southwest wind 7 to 11 mph.
  • Friday Mostly sunny, with a high near 59. West wind 7 to 13 mph.
  • Friday Night Partly cloudy, with a low around 39.
  • Saturday Mostly sunny, with a high near 65.
  • Saturday Night Partly cloudy, with a low around 41.
  • Sunday A slight chance of showers. Partly sunny, with a high near 55.
  • Sunday Night A slight chance of showers. Mostly cloudy, with a low around 34.
  • Monday A slight chance of showers. Mostly sunny, with a high near 49.
  • Monday Night A slight chance of showers. Partly cloudy, with a low around 29.
  • Tuesday A slight chance of showers. Mostly sunny, with a high near 54.