Very Low Pollen in Longmont, CO
Very low today, mostly weed pollen.
Last updated September 29, 2026
What to do today
- Pollen levels are very low right now. It's a great day to enjoy the outdoors!
Forecast
About pollen in Longmont
Pollen levels in Longmont remain quiet today, with weeds standing as the only real presence in the air, and even that is minimal. Anyone with sensitivities should notice little to no irritation, making this a comfortable day to be outside without much concern about pollen triggering symptoms. Looking ahead, weed pollen is expected to stay at this low level over the next couple of days, offering continued relief. This lines up with the seasonal pattern, as ragweed and other late-season weeds are winding down heading into fall, while tree pollen from species like cottonwood, elm, and maple remains dormant until spring. For now, conditions favor those who typically deal with seasonal allergies.
Common questions
- What is the pollen count in Longmont, CO today?
- Longmont, CO is at a very low 1 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. The five-day outlook holds steady around 1 of 5.
- Is weed pollen high in Longmont, CO right now?
- Weed pollen is very low today at 1 of 5, and it's past its peak season. Most people won't notice it.