Moderate Pollen in Longmont, CO

Moderate today, mostly grass pollen.

Last updated July 1, 2026

Today's index3out of 5Moderate
TreeVery Lowoff-season
GrassModerateoff-season

What to do today

  • It's important to shower and wash your hair after spending a lot of time outdoors.
  • When spending time outside, use sunglasses and a cap to keep pollen out of your face and eyes.
  • Wash clothes worn outdoors to remove any remnants of pollen grains.
  • If possible, wear glasses instead of contact lenses.
  • Did you hang any laundry outside? Now is a good time to hang clothes indoors or use a dryer if possible.

Forecast

Thu
3
Fri
3
Sat
3
Sun
3

About pollen in Longmont

Grass pollen is the main player in Longmont today, sitting at a moderate level (3) and driving the overall index to the same moderate reading. Tree pollen has dropped off to very low (1), which is typical now that the spring surge from regional species like cottonwood, juniper, and pine has faded into summer. The five-day outlook holds steady, with grass staying at moderate and tree pollen lingering at very low throughout. This pattern fits the late-spring-to-early-summer window, when grasses are the dominant source. No weed data is available at this time, though ragweed generally stays quiet until later in the season.

Common questions

What is the pollen count in Longmont, CO today?
Longmont, CO is at a moderate 3 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. The five-day outlook holds steady around 3 of 5.
Is grass pollen high in Longmont, CO right now?
Grass pollen is moderate today at 3 of 5, and it's past its peak season. Sensitive people may notice symptoms.