MT pollen report
Great Falls Pollen Report
PollyMap is actively seeking a qualified local collection partner in Great Falls. This guide uses regional climate and historical allergen data while we recruit a local host.
Collection coming soon to Great Falls
PollyMap is actively recruiting a verified local partner in Great Falls. Be the first to know — or apply to be the partner.
Pollen patterns in Great Falls
In Great Falls, tree pollen — including Juniper, Cedar, Cottonwood — typically dominates from late winter through spring. Brome grass is the most common warm-season pollinator, and Sagebrush drives the largest fall pollen load.
Top trees
- Juniper
- Cedar
- Cottonwood
- Pine
- Aspen
Top grasses
- Brome
- Bluegrass
- Fescue
Top weeds
- Sagebrush
- Ragweed
- Russian thistle
Top molds
- Cladosporium
- Alternaria
Great Falls pollen calendar
Typical monthly intensity across the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| tree | ||||||||||||
| grass | ||||||||||||
| weed | ||||||||||||
| mold |
Historical reports
Cities near Great Falls
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
When is allergy season in Great Falls?
In Great Falls, allergy season starts with tree pollen in late winter and early spring, transitions to grass pollen in May and June, and ends with weed pollen — primarily ragweed and sagebrush — from August through October.
What pollen is highest in Great Falls?
The most prevalent local pollens in Great Falls include Juniper, Cedar, Cottonwood in the spring season.
What months are worst for allergies in Great Falls?
Most Great Falls allergy sufferers report the worst symptoms during peak tree pollen in March-May and again during ragweed season in September.
Does Great Falls have mold allergies?
Yes. Great Falls's climate supports Cladosporium and Alternaria spore exposure, with counts typically peaking in the warm and humid months.
Why are allergies bad in Great Falls?
Local geography, climate, and seasonal plant cycles all influence allergen load in Great Falls. The combination of regional vegetation and weather creates predictable spring and fall pollen peaks.
Is there a local pollen collection site in Great Falls?
Not yet. PollyMap is actively seeking a qualified local allergy clinic or environmental health partner in Great Falls to host weekly pollen collection.
How can my clinic become a PollyMap partner in Great Falls?
Clinics in Great Falls can apply to become the official PollyMap collection partner. Approved partners receive PollyKits weekly, conduct 24-48 hour collections, and mail samples back for microscope analysis.
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