National Weather Service United States Department of Commerce

Active pattern for the Pacific Northwest this week while a coastal low takes aim on the Northeast later this week

Thunderstorms with heavy rainfall is forecast to bring 5 to 7 inches of rainfall, with localized heavier amounts, to the Pacific Northwest throughout the week. Across the higher mountain elevations, measurable snow is likely. The Northeast will also be the focus of showers and thunderstorms beginning mid-week as a coastal low meanders of the Mid-Atlantic coast.
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Hazardous Weather Conditions

Current Conditions

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Longmont CO

7 Day Forecast

For More Weather Information:

Denver-Boulder, CO Local Forecast Office

Overnight

Mostly Clear

Mostly
Clear

Low: 42 °F

Tuesday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 74 °F

Tuesday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 46 °F

Wednesday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 64 °F

Wednesday
Night

Partly Cloudy

Partly
Cloudy

Low: 37 °F

Thursday

Sunny

Sunny

High: 72 °F

Thursday
Night

Mostly Clear

Mostly
Clear

Low: 41 °F

Friday

Sunny

Sunny

High: 78 °F

Friday
Night

Clear

Clear

Low: 41 °F

Detailed Forecast

  • Overnight Mostly clear, with a low around 42. West northwest wind around 6 mph.
  • Tuesday A 20 percent chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 74. West wind around 6 mph becoming calm.
  • Tuesday Night A slight chance of showers and thunderstorms. Mostly cloudy, with a low around 46. West northwest wind 5 to 7 mph becoming light and variable after midnight. Chance of precipitation is 20%.
  • Wednesday A slight chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 64. Light and variable wind becoming southwest 5 to 9 mph in the afternoon. Chance of precipitation is 20%.
  • Wednesday Night Partly cloudy, with a low around 37. Light and variable wind becoming west around 5 mph.
  • Thursday Sunny, with a high near 72.
  • Thursday Night Mostly clear, with a low around 41.
  • Friday Sunny, with a high near 78.
  • Friday Night Clear, with a low around 41.
  • Saturday Sunny, with a high near 78.
  • Saturday Night Mostly clear, with a low around 41.
  • Sunday Mostly sunny, with a high near 72.
  • Sunday Night Partly cloudy, with a low around 36.
  • Monday Mostly sunny, with a high near 59.