Weather in Longmont, CO
Updated 2026-09-26 09:00 local time · ZIP codes 80501, 80503, 80504
Sunny
No government weather alerts were returned for this location at the latest update.
Next hours
67°1% rain74°0% rain79°0% rain82°0% rain84°1% rain
85°8% rain
85°3% rain85°4% rain84°1% rain80°1% rain
71°1% rain
68°4% rain3-day weather forecast
Weather details
Sunrise, sunset and moon
Key weather changes ahead
Today vs yesterday in Longmont
Weather insights for today
Rain chance stays relatively low over the next 12 hours (up to 8%).
It feels like 63°F with winds near 3 mph.
71°F, 1% rain chance and 9 mph wind.
Visibility is around 6 mi; gusts may reach 20 mph.
Current temperature is 67°F, wind 3 mph, rain chance up to 8%.
UV index is 1.
Local weather characteristics in Longmont
Colorado weather changes quickly with elevation. The eastern plains, Front Range and high mountains can have very different temperatures, wind, snow and thunderstorm conditions on the same day.
Longmont is part of the West weather region. The forecast point is near 40.17°N latitude and 105.10°W longitude. Local temperature, wind and precipitation can still differ from nearby places, especially where terrain, coastlines or urban development create small-scale weather changes.
Longmont weather today
Sunny and 67°F in Longmont, CO. Today's high is 85°F with a 1% rain chance. Winds are around 3 mph with gusts near 4 mph. Relative humidity is 37%, pressure is 29.91 inHg, and visibility is about 6 miles.
Tonight and tomorrow in Longmont
Sunrise is at 06:51 AM and sunset is at 06:51 PM. Tomorrow's forecast calls for Overcast with a high near 84°F and a low near 56°F. The maximum rain chance is 17%.