Pollen in Thornton, CO

No notable pollen right now.

Last updated November 14, 2026

Today's indexN/Aout of 5No data

Forecast

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About pollen in Thornton

Pollen activity in Thornton is quiet today, with no significant tree, grass, or weed pollen in the air. This is typical for mid-November, when cooler temperatures and the onset of winter weather bring most plants into dormancy. Anyone sensitive to allergens should find today an easy day to be outdoors without much concern. Looking ahead, conditions are likely to remain calm through the next several days, as the region moves deeper into the dormant season. Thornton's tree pollen, from species like cottonwood, elm, and juniper, typically peaks in spring, while grasses follow in late spring and early summer, and ragweed and other weeds taper off by late fall. With winter approaching, pollen levels overall should stay low until growth resumes next year.

Common questions

What is the pollen count in Thornton, CO today?
Thornton, CO has no notable tree, grass, or weed pollen today.