National Weather Service United States Department of Commerce

Wet weather continues across Pacific Northwest and New England

Two developing storm systems will continue to bring heavy rain to opposite coasts of the U.S. on Thursday. One system is affecting the Pacific Northwest and northern California while the other affects New England. There is a risk of flash flooding across parts of New England on Thursday where Flash Flood Watches are in effect.
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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: 65 °F

Tonight

Mostly Cloudy

Mostly
Cloudy

Low: 41 °F

Friday

Partly Sunny

Partly
Sunny

High: 58 °F

Friday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 38 °F

Saturday

Sunny

Sunny

High: 64 °F

Saturday
Night

Partly Cloudy

Partly
Cloudy

Low: 42 °F

Sunday

Slight Chance Showers Chance for Measurable Precipitation 20%

Slight Chc
Showers

High: 60 °F

Sunday
Night

Slight Chance Showers

Slight Chc
Showers

Low: 34 °F

Monday

Slight Chance Showers

Slight Chc
Showers

High: 44 °F

Detailed Forecast

  • Today Partly sunny, with a high near 65. South southwest wind 8 to 15 mph, with gusts as high as 21 mph.
  • Tonight Mostly cloudy, with a low around 41. West wind 7 to 10 mph.
  • Friday Partly sunny, with a high near 58. West wind 8 to 13 mph.
  • Friday Night Mostly cloudy, with a low around 38. West wind around 6 mph becoming south after midnight.
  • Saturday Sunny, with a high near 64. South southeast wind 7 to 11 mph.
  • Saturday Night Partly cloudy, with a low around 42.
  • Sunday A 20 percent chance of showers. Partly sunny, with a high near 60.
  • Sunday Night A slight chance of showers. Mostly cloudy, with a low around 34.
  • Monday A slight chance of showers. Partly sunny, with a high near 44.
  • Monday Night Mostly cloudy, with a low around 27.
  • Tuesday Mostly sunny, with a high near 49.
  • Tuesday Night A slight chance of showers. Mostly cloudy, with a low around 32.
  • Wednesday A slight chance of showers. Partly sunny, with a high near 55.