HI · Allergy Season Guide
Hawaii Allergy Season Guide
Hawaii experiences a tropical climate with consistent warm temperatures, trade winds, and a wet-dry seasonal pattern that varies by elevation and island side.
Summary
Hawaii has 0 active PollyMap collection sites, and is seeking partners in 5 additional cities. Tree pollen typically dominates early spring, grass pollen peaks in late spring and early summer, and weed pollen (including ragweed) extends from late summer through fall.
PollyMap collection status across Hawaii
While we find a local clinic
Test the air at your own home in Hawaii
No allergy clinic is reporting from Hawaii 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.
Statewide allergy overview
Hawaii experiences a tropical climate with consistent warm temperatures, trade winds, and a wet-dry seasonal pattern that varies by elevation and island side.
Grass pollen — especially Bermuda, paspalum, and Johnson grass — is the dominant year-round trigger. Tree pollen is less seasonal than on the mainland, with eucalyptus, mango, and ironwood active throughout the year.
Persistent tropical humidity supports very high year-round mold counts, particularly Cladosporium, Alternaria, and Aspergillus.
Allergy patterns vary by elevation and proximity to coast or mountains within Hawaii, but most of the state shares a common seasonal rhythm of spring tree pollen, summer grass pollen, and late-summer to fall weed pollen.
Hawaii allergy calendar
Month-by-month intensity for the four major airborne allergen categories.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tree | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod |
| Grass | High | High | High | V.High | V.High | V.High | V.High | V.High | V.High | High | High | High |
| Weed | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod | Mod |
| Mold | High | High | High | High | High | High | High | High | High | High | High | High |
Top tree pollens
Top airborne molds
Major city guides in Hawaii
Latest PollyMap reports for Hawaii
Frequently asked questions
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