National Weather Service Forecast for: Longmont CO
Issued by: National Weather Service Denver-Boulder, CO
Updated: 12:47 pm MDT Apr 6, 2026
 
This
Afternoon
This Afternoon: Mostly sunny, with a high near 71. East wind 8 to 11 mph, with gusts as high as 18 mph.
Mostly Sunny

Tonight

Tonight: Mostly cloudy, with a low around 36. East wind 6 to 11 mph becoming light northeast  after midnight. Winds could gust as high as 23 mph.
Mostly Cloudy

Tuesday

Tuesday: A 30 percent chance of showers, mainly after 3pm.  Partly sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Partly Sunny
then Chance
Showers
Tuesday
Night
Tuesday Night: A 20 percent chance of showers before midnight.  Partly cloudy, with a low around 42. West southwest wind 5 to 7 mph, with gusts as high as 16 mph.
Slight Chance
Showers then
Partly Cloudy
Wednesday

Wednesday: Mostly sunny, with a high near 73. West southwest wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Mostly Sunny

Wednesday
Night
Wednesday Night: A 20 percent chance of showers before midnight.  Partly cloudy, with a low around 38.
Slight Chance
Showers then
Partly Cloudy
Thursday

Thursday: A 30 percent chance of showers after noon.  Partly sunny, with a high near 72.
Mostly Sunny
then Chance
Showers
Thursday
Night
Thursday Night: A chance of showers before midnight.  Mostly cloudy, with a low around 41.
Chance
Showers then
Mostly Cloudy
Friday

Friday: A chance of showers after noon.  Mostly cloudy, with a high near 70.
Mostly Cloudy
then Chance
Showers
Hi 71 °F Lo 36 °F Hi 71 °F Lo 42 °F Hi 73 °F Lo 38 °F Hi 72 °F Lo 41 °F Hi 70 °F

Hazardous Weather Outlook
 

This Afternoon
 
Mostly sunny, with a high near 71. East wind 8 to 11 mph, with gusts as high as 18 mph.
Tonight
 
Mostly cloudy, with a low around 36. East wind 6 to 11 mph becoming light northeast after midnight. Winds could gust as high as 23 mph.
Tuesday
 
A 30 percent chance of showers, mainly after 3pm. Partly sunny, with a high near 71. Calm wind becoming south 5 to 8 mph in the afternoon. Winds could gust as high as 17 mph.
Tuesday Night
 
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 42. West southwest wind 5 to 7 mph, with gusts as high as 16 mph.
Wednesday
 
Mostly sunny, with a high near 73. West southwest wind 5 to 11 mph becoming north in the afternoon. Winds could gust as high as 23 mph.
Wednesday Night
 
A 20 percent chance of showers before midnight. Partly cloudy, with a low around 38.
Thursday
 
A 30 percent chance of showers after noon. Partly sunny, with a high near 72.
Thursday Night
 
A chance of showers before midnight. Mostly cloudy, with a low around 41.
Friday
 
A chance of showers after noon. Mostly cloudy, with a high near 70.
Friday Night
 
A chance of showers before midnight. Mostly cloudy, with a low around 43.
Saturday
 
A chance of showers. Mostly cloudy, with a high near 74.
Saturday Night
 
A chance of showers. Mostly cloudy, with a low around 43.
Sunday
 
A chance of showers. Partly sunny, with a high near 73.

 

Forecast from NOAA-NWS for Longmont CO.