National Weather Service United States Department of Commerce

Slight Risk of Severe Thunderstorms is Forecast This Afternoon through Tonight

A few severe storms are possible late this afternoon, this evening and tonight across parts of the northern High Plains. Other strong storms are possible today in a corridor arcing from the central Gulf Coast into the Tennessee Valley, and across lower Michigan and adjacent portions of the Great Lakes region. Heavy rain and local flash flooding is possible Gulf Coast and Lower Mississippi Valley.
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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

This
Afternoon

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 85 °F

Tonight

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

Low: 53 °F

Sunday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 82 °F

Sunday
Night

Slight Chance Thunderstorms Chance for Measurable Precipitation 10%

Slight Chc
Thunderstorms

Low: 50 °F

Labor
Day

Slight Chance Thunderstorms Chance for Measurable Precipitation 10%

Slight Chc
Thunderstorms

High: 81 °F

Monday
Night

Partly Cloudy

Partly
Cloudy

Low: 50 °F

Tuesday

Sunny

Sunny

High: 82 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 53 °F

Wednesday

Sunny

Sunny

High: 87 °F

Detailed Forecast

  • This Afternoon A 20 percent chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. South wind 7 to 9 mph becoming west southwest.
  • Tonight A 20 percent chance of showers and thunderstorms before 10pm. Mostly cloudy, with a low around 53. Southwest wind 3 to 8 mph.
  • Sunday A 20 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 82. Breezy, with a west wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 26 mph.
  • Sunday Night A 10 percent chance of showers and thunderstorms before midnight. Partly cloudy, with a low around 50. West wind 6 to 11 mph, with gusts as high as 17 mph.
  • Labor Day A 10 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 81. Calm wind becoming northwest 5 to 7 mph in the afternoon.
  • Monday Night Partly cloudy, with a low around 50.
  • Tuesday Sunny, with a high near 82.
  • Tuesday Night Mostly clear, with a low around 53.
  • Wednesday Sunny, with a high near 87.
  • Wednesday Night Mostly clear, with a low around 54.
  • Thursday A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84.
  • Thursday Night A slight chance of showers and thunderstorms. Partly cloudy, with a low around 53.
  • Friday A slight chance of showers and thunderstorms. Partly sunny, with a high near 80.