Moderate Pollen in Thornton, 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 Thornton

Grass pollen is the main driver in Thornton today, sitting at a moderate level (3) and pushing the overall index to moderate as well. Tree pollen is very low (1), which is typical now that the spring tree season has largely wound down. The five-day forecast shows little change ahead, with grass holding steady at moderate and tree pollen remaining very low throughout. This pattern fits the late-spring-into-early-summer stretch, when grasses are the dominant source rather than trees. Weed pollen, which tends to ramp up later toward late summer and fall, is not reported in the current data.

Common questions

What is the pollen count in Thornton, CO today?
Thornton, 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 Thornton, CO right now?
Grass pollen is moderate today at 3 of 5, and it's past its peak season. Sensitive people may notice symptoms.