CO
Colorado Pollen Reports
Colorado experiences a high-elevation semi-arid to alpine climate with cold winters, warm dry summers, and dramatic day-night temperature swings.
No active PollyMap Partner in Colorado yet
We're seeking a pollen partner in Colorado.
PollyMap doesn't publish cheap forecast estimates — the kind that guess what might be in the air and are often wrong by the time you read them. Every report on PollyMap is real airborne pollen and mold, captured by a PollyKit air sampler and counted under a microscope by a trained local partner.
We're actively seeking an allergy clinic or qualified collector to become the Official PollyMap Partner for Colorado. Exclusive territory, weekly content, and AI-assisted analysis included.
Pollen patterns across Colorado
Juniper, cedar, and cottonwood drive an early-spring tree season. Grasses peak in early summer and sagebrush is the dominant fall weed.
Colorado pollen calendar
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| grass | ||||||||||||
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| mold |
Featured cities in Colorado
Don't see your city? PollyMap partners can serve any city in Colorado — request a local report below.
Don't see your city?
We cover every city in Colorado through our partner network. Request a report for your town and we'll route it to the nearest certified allergist.
Latest reports
Frequently asked questions
When is allergy season in Colorado?
Allergy season in Colorado typically runs from late winter through fall. Tree pollen rises first, followed by grass pollen in late spring and early summer, and weed pollen (especially ragweed) in late summer and fall.
What pollen is highest in Colorado?
In Colorado, the highest-pollen species are typically Juniper, Cedar, Cottonwood in spring, Brome grass in early summer, and Sagebrush in fall.
What months are worst for allergies in Colorado?
For most people, April and May (tree pollen) and September (ragweed) are the most difficult months in Colorado, with grass pollen creating a third peak in June.
Does Colorado have mold allergies?
Yes. The region's climate supports both outdoor and indoor mold exposure — particularly Cladosporium, Alternaria. Outdoor mold spore counts often rise after rain and in fall when leaves decay.
How can clinics become PollyMap collection partners?
Qualified allergy clinics, naturopathic offices, universities, and environmental health professionals can apply to host a PollyKit and become an official PollyMap collection partner. Applications are reviewed by the PollyMap team.
Become the lead collection partner for Colorado.
PollyMap is actively seeking allergy clinics and qualified collectors in Colorado.
Apply today