National Weather Service Forecast for: Longmont CO
Issued by: National Weather Service Denver-Boulder, CO
Updated: 11:47 am MST Nov 1, 2026
 
Tonight

Tonight: A slight chance of rain before 11pm, then a chance of rain after 2am. Cloudy, then gradually becoming partly cloudy, with a low around 46. Calm wind. Chance of precipitation is 30%.
Chance Rain
 Monday

Monday: Rain likely, mainly between 8am and 11am. Cloudy, with a high near 55. Breezy, with a light and variable wind becoming north 10 to 15 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Rain Likely
and Breezy
 Monday
Night
Monday Night: A slight chance of rain before 11pm, then a slight chance of rain after 2am. Cloudy, then gradually becoming partly cloudy, with a low around 41. North wind 8 to 13 mph becoming light north northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Slight Chance
Rain
 Tuesday

Tuesday: Sunny, with a high near 59. West northwest wind around 5 mph becoming calm in the afternoon.
Sunny
 Tuesday
Night
Tuesday Night: Mostly clear, with a low around 36. Calm wind.
Mostly Clear
 Wednesday

Wednesday: Mostly sunny, with a high near 55.
Mostly Sunny
 Wednesday
Night
Wednesday Night: A 20 percent chance of showers. Mostly cloudy, with a low around 36.
Slight Chance
Showers
 Thursday

Thursday: Sunny, with a high near 56.
Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 35.
Partly Cloudy
Lo 46 °F Hi 55 °F Lo 41 °F Hi 59 °F Lo 36 °F Hi 55 °F Lo 36 °F Hi 56 °F Lo 35 °F

 

Tonight
 
 A slight chance of rain before 11pm, then a chance of rain after 2am. Cloudy, then gradually becoming partly cloudy, with a low around 46. Calm wind. Chance of precipitation is 30%.
Monday
 
 Rain likely, mainly between 8am and 11am. Cloudy, with a high near 55. Breezy, with a light and variable wind becoming north 10 to 15 mph in the morning. Winds could gust as high as 26 mph. Chance of precipitation is 60%.
Monday Night
 
 A slight chance of rain before 11pm, then a slight chance of rain after 2am. Cloudy, then gradually becoming partly cloudy, with a low around 41. North wind 8 to 13 mph becoming light north northwest after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 20%.
Tuesday
 
 Sunny, with a high near 59. West northwest wind around 5 mph becoming calm in the afternoon.
Tuesday Night
 
 Mostly clear, with a low around 36. Calm wind.
Wednesday
 
 Mostly sunny, with a high near 55.
Wednesday Night
 
 A 20 percent chance of showers. Mostly cloudy, with a low around 36.
Thursday
 
 Sunny, with a high near 56.
Thursday Night
 
 Partly cloudy, with a low around 35.
Friday
 
 Mostly sunny, with a high near 57.
Friday Night
 
 Partly cloudy, with a low around 36.
Saturday
 
 Mostly sunny, with a high near 55.
Saturday Night
 
 Partly cloudy, with a low around 34.
Sunday
 
 Sunny, with a high near 59.

 

Forecast from NOAA-NWS for Longmont CO.