NJ · Allergy Season Guide
New Jersey Allergy Season Guide
New Jersey experiences a humid continental climate with four distinct seasons — cold, snowy winters and warm, humid summers.
Summary
New Jersey 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 New Jersey
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Test the air at your own home in New Jersey
No allergy clinic is reporting from New Jersey 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
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Or hang it indoors
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Statewide allergy overview
New Jersey experiences a humid continental climate with four distinct seasons — cold, snowy winters and warm, humid summers.
Birch, oak, maple, and beech produce an intense April-May tree season. Grass pollen peaks in June, and ragweed lasts from mid-August through October.
Humid summers, dense tree cover, and heavy leaf decay drive elevated Alternaria and Cladosporium counts from late summer into fall.
Allergy patterns vary by elevation and proximity to coast or mountains within New Jersey, but most of the state shares a common seasonal rhythm of spring tree pollen, summer grass pollen, and late-summer to fall weed pollen.
New Jersey 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 | Low | Mod | High | V.High | V.High | High | Mod | Low | Low | Low | Low | Low |
| Grass | — | — | Low | Mod | V.High | V.High | High | Mod | Low | Low | — | — |
| Weed | Low | Low | Low | Mod | Mod | Mod | High | V.High | V.High | High | Mod | Low |
| Mold | Low | Low | Mod | Mod | High | High | High | V.High | V.High | V.High | Mod | Low |
Top weed pollens
Top airborne molds
Major city guides in New Jersey
NJ
Newark
View Newark allergy season guide →
NJ
Jersey City
View Jersey City allergy season guide →
NJ
Paterson
View Paterson allergy season guide →
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Elizabeth
View Elizabeth allergy season guide →
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Edison
View Edison allergy season guide →
Latest PollyMap reports for New Jersey
Frequently asked questions
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