KY pollen report
Louisville Pollen Report
Louisville regularly lands near the top of national 'allergy capital' rankings, and the Ohio Valley location explains why: the river basin holds humidity and pollen, the surrounding bluegrass country adds heavy grass and tree pollen, and Kentucky's long warm season runs from late winter to the first hard frost. It's a genuinely tough place for allergy sufferers.
Collection coming soon to Louisville
PollyMap is actively recruiting a verified local partner in Louisville. Be the first to know — or apply to be the partner.
While we find a local clinic
Test the air at your own home in Louisville
No allergy clinic is reporting from Louisville yet. Until one does, you can order your own PollyKit — a simple air sampler you hang outdoors or indoors. Send it back and the PollyKit Lab shows you exactly what's floating in your air.
- Pollen from local trees, grasses and weeds
- Airborne mold spores
- Dust mites and other indoor allergens
Hang it outdoors
See which pollen and mold are in your yard this season.
Or hang it indoors
Check bedrooms and living spaces for mold, dust mites and more.
What drives allergies in Louisville
Trees: oak, maple, and cedar (February – May)
Eastern red cedar and elm start early; oaks (Quercus) and maples dominate April — Louisville's roughest month.
Grasses: bluegrass country (May – July)
Kentucky bluegrass and fescue pastures surround the metro and pollinate heavily in June. The name isn't just marketing — grass pollen here is serious.
Weeds: ragweed (August – frost)
Kentucky is core ragweed territory. Counts stay elevated from late summer until a hard frost, often into November.
Mold: Ohio Valley humidity
The river valley's muggy air keeps Alternaria and Cladosporium active from late spring through fall, with spikes after storms.
Pollen patterns in Louisville
In Louisville, tree pollen — including Oak, Birch, Cedar — typically dominates from late winter through spring. Bluegrass grass is the most common warm-season pollinator, and Ragweed drives the largest fall pollen load.
Top trees
- Oak
- Birch
- Cedar
- Maple
- Pine
Top grasses
- Bluegrass
- Bermuda
- Rye
- Fescue
Top weeds
- Ragweed
- Pigweed
- Plantain
Top molds
- Alternaria
- Cladosporium
- Aspergillus
Louisville 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 Louisville
Explore pollen activity in nearby cities reported by the PollyMap network.
Frequently asked questions
What is the pollen count in Louisville today?
PollyMap publishes real, microscope-verified pollen counts for Louisville — measured from physical air samples. The latest report on this page shows current tree, grass, weed, and mold levels.
Is the pollen count high in Louisville right now?
Louisville's worst stretches are April (oak), June (grasses), and September (ragweed). The measured reports on this page show today's actual levels.
When is allergy season in Louisville?
February through November: cedar and elm in late winter, oak in spring, grasses in early summer, ragweed in fall, and mold through the humid months.
Why does Louisville rank so high for allergies?
The Ohio Valley traps humidity and pollen, bluegrass pastures ring the city, and the warm season is long — several national rankings have put Louisville among the worst US cities for allergies.
Are you an allergy clinic in Louisville? Claim your territory on PollyMap.
PollyMap is a local authority-building tool for allergy clinics, ENT practices, and any clinic that offers allergy care. By becoming the Official PollyMap Partner for your part of Louisville, your clinic gets credited on real pollen reports, receives ready-to-share weekly content, and becomes the go-to local expert patients trust.
We assign each partner a designated territory within the Louisville metro — like a franchise territory. Louisville has room for multiple partners, but once your area is assigned, it's locked to your clinic.
No clinic has claimed a territory in Louisville yet. The best areas go to the first clinics that sign up — once one does, that part of town is off the table for everyone else.
Louisville, Jeffersontown, St. Matthews, and Southern Indiana each make PollyMap territories. The first allergy clinic in each area becomes its credited pollen expert.
- Your clinic credited on every Louisville pollen report
- Weekly real-sample reports and ready-to-share content under your brand
- Locked territory — competing clinics can't claim your area
- Become the go-to allergy expert in your part of Louisville
Supported by PollyMap sponsors
Your business could be here
Reach local families checking real pollen conditions in their community.
Become a sponsorReport findings are based on reviewed sample data and are not influenced by sponsors.