Widespread Excessive Heat and Humidity in Midwest to Spread to East Coast

High pressure building across the Central and Eastern U.S. will produce a dangerous combination of heat and humidity. Heat indices from unusually high dewpoints and well above normal temperatures may reach 110 to 115 degrees. In addition, near record warm low temperatures will limit recovery from hot daytime temperatures. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

En Español

Current conditions at

Vance Brand Airport (KLMO)

Lat: 40.16°NLon: 105.16°WElev: 5039ft.

Fair

100°F

38°C

Humidity	8%
Wind Speed	NW 15 G 22 mph
Barometer	29.94 in
Dewpoint	27°F (-3°C)
Visibility	10.00 mi
Heat Index	94°F (34°C)
Last update	18 Jul 1:35 pm MDT

More Information:

Local Forecast Office More Local Wx 3 Day History Mobile Weather Hourly Weather Forecast

Extended Forecast for

Longmont CO

This
Afternoon

Hot
High: 100 °F
Tonight

Mostly Clear
Low: 63 °F
Friday

Hot
High: 99 °F
Friday
Night

Partly Cloudy
Low: 64 °F
Saturday

Sunny then
Chance
T-storms
High: 86 °F
Saturday
Night

Chance
T-storms
Low: 60 °F
Sunday

Slight Chance
T-storms then
Chance
T-storms
High: 83 °F
Sunday
Night

Chance
T-storms
Low: 60 °F
Monday

Chance
T-storms
High: 85 °F

Detailed Forecast

This Afternoon

Sunny and hot, with a high near 100. South wind 9 to 11 mph becoming west. Winds could gust as high as 16 mph.

Tonight

Mostly clear, with a low around 63. West wind 5 to 10 mph becoming light southwest after midnight.

Friday

Sunny and hot, with a high near 99. Light and variable wind.

Friday Night

Partly cloudy, with a low around 64. South southeast wind around 5 mph becoming calm in the evening.

Saturday

A 30 percent chance of showers and thunderstorms after noon. Mostly sunny, with a high near 86. Calm wind becoming northeast around 6 mph in the morning. Winds could gust as high as 15 mph.

Saturday Night

A 30 percent chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 60.

Sunday

A 50 percent chance of showers and thunderstorms, mainly after noon. Partly sunny, with a high near 83.

Sunday Night

A chance of showers and thunderstorms, mainly before midnight. Mostly cloudy, with a low around 60.

Monday

A chance of showers and thunderstorms, mainly after noon. Mostly sunny, with a high near 85.

Monday Night

A chance of showers and thunderstorms, mainly before midnight. Partly cloudy, with a low around 59.

Tuesday

A chance of showers and thunderstorms. Sunny, with a high near 89.