Early Season Heat; Late Season Snow

An early season heat wave will consume a good portion of the Eastern U.S. today through the weekend, including the Northeast, Mid-Atlantic and Ohio Valley. Numerous record high temperatures are likely and heat advisories are in effect for Boston, New York City and Philadelphia. A late season snow will impact the central Rockies and several inches of snow are possible in the Denver metro area. Read More >

Hazardous Weather Conditions

En Español

Current conditions at

Vance Brand Airport (KLMO)

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

Light Rain

40°F

4°C

Humidity	88%
Wind Speed	E 5 mph
Barometer	29.81 in
Dewpoint	36°F (2°C)
Visibility	5.00 mi
Wind Chill	36°F (2°C)
Last update	20 May 8:15 am MDT

More Information:

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

Extended Forecast for

Longmont CO

Winter Storm Warning May 20, 04:00pm until May 21, 12:00pm

Freeze Warning May 20, 09:00pm until May 21, 10:00am

Click here for hazard details and duration

Winter Storm Warning

Freeze Warning

Today

Showers
High: 42 °F
Tonight

Rain/Snow
then Snow
Showers
Low: 30 °F
Saturday

Rain/Snow
Likely
High: 45 °F
Saturday
Night

Slight Chance
Rain/Snow
then Partly
Cloudy
Low: 28 °F
Sunday

Partly Sunny
then Chance
Showers
High: 54 °F
Sunday
Night

Chance
Showers then
Slight Chance
T-storms
Low: 39 °F
Monday

Chance
Showers then
Chance
T-storms
High: 63 °F
Monday
Night

Chance
Showers
Low: 41 °F
Tuesday

Chance
Showers then
Chance
T-storms
High: 62 °F

Detailed Forecast

Today

Showers. High near 42. East wind 8 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 100%.

Tonight

Rain and snow showers, becoming all snow after 11pm. Low around 30. North wind 6 to 10 mph, with gusts as high as 16 mph. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

Saturday

Snow showers likely before 10am, then rain and snow showers likely between 10am and 4pm, then rain showers likely after 4pm. Some thunder is also possible. Cloudy, with a high near 45. North northwest wind around 6 mph becoming south in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

Saturday Night

A slight chance of rain showers, mixing with snow after 11pm, then gradually ending. Some thunder is also possible. Partly cloudy, with a low around 28. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.

Sunday

A 30 percent chance of showers and thunderstorms after noon. Partly sunny, with a high near 54. Calm wind becoming east southeast 5 to 7 mph in the morning.

Sunday Night

A chance of showers and thunderstorms before 3am, then a slight chance of showers. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.

Monday

A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 63. Chance of precipitation is 40%.

Monday Night

A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 41.

Tuesday

A chance of showers, with thunderstorms also possible after noon. Partly sunny, with a high near 62.

Tuesday Night

A chance of showers and thunderstorms before midnight, then a slight chance of showers. Mostly cloudy, with a low around 40.

Wednesday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 71.

Wednesday Night

Mostly clear, with a low around 44.