Longmont, CO Weather Forecast
Boulder County, Colorado
Live radar, warnings and storm tracking for Longmont, with free alerts the moment it counts.
The next few hours
Taller, warmer bars mean heavier rain. Dotted means no reading for that hour.
Hour by hour
Sunrise and sunset
Next five days, scored 0 to 100The first day or two use the HRRR and NBM cloud layers. Later days only have total cloud, so treat them as a rough guide.
Know when sunset at this place will be worth a photo
We score every sunrise and sunset here from the cloud, haze and smoke forecast, and let you know when one is likely to light up. Sunrise the evening before, sunset a few hours ahead.
Seven-day outlook
Free alerts for Longmont
Every NWS warning, pushed to your phone, inbox or webhook the moment it is issued.
Longmont, CO at a glance
Longmont is home to about 98,630 people in Boulder County, across 29 square miles. It ranks 13th by population of 105 places in Colorado with a forecast here. The nearest neighbour with its own forecast is Mead, 7 miles away.
- County
- Boulder County
- Population
- 98,630 2023 est.
- Land area
- 29 sq mi
- People per sq mi
- 3,397
- Forecast point
- 40.1699°N, 105.1018°W
How well can the network see Longmont?
The nearest Doppler radar is KFTG (Denver, CO), to the SE. Its lowest scan passes about 2,600 ft above Longmont. Close enough to see rotation in the low part of a storm, where tornadoes form. Longmont is closer to its radar than 57% of US cities.
The closest weather station is KLMO (Longmont/Brand Arpt). Close enough that its readings are the conditions in town.
Forecasts near Longmont
- Mead, CO7 mi
- Frederick, CO8 mi
- Firestone, CO8 mi
- Erie, CO10 mi
- Berthoud, CO11 mi
- Dacono, CO11 mi
- Lafayette, CO12 mi
- Boulder, CO13 mi
Elsewhere in Colorado
DenverColorado SpringsAuroraFort CollinsLakewoodThorntonAll Colorado forecasts →