AZ · Allergy Season Guide
Phoenix Allergy Season Guide
Phoenix is an active PollyMap collection site. Carefree Allergy collects weekly pollen samples used to publish local reports.
Local pollen data for Phoenix is collected through the PollyMap network.
Official PollyMap Partner
Carefree Allergy
Summary
Phoenix is an active PollyMap collection site. Local pollen, mold, and air quality data are collected weekly through Carefree Allergy. Tree pollen peaks in spring, grass pollen in late spring and early summer, and weed pollen in late summer and fall.
Local allergy guide for Phoenix
Phoenix shares Arizona's a hot, arid desert climate with long dry summers, mild winters, and very low annual rainfall. at 1,086 ft elevation.
Phoenix at 1,086 ft elevation sits within Arizona's broader regional climate.
In Phoenix, tree pollen — including Mulberry, Olive, Mesquite — typically dominates from late winter through spring. Bermuda grass is the most common warm-season pollinator, and Ragweed drives the largest fall pollen load.
Phoenix's local mold profile includes Alternaria, Cladosporium, Aspergillus. Spore counts tend to peak after rainfall and during the warm, humid portion of the year.
Local weather — temperature, rainfall, wind, and humidity — drives day-to-day pollen levels. Dry, windy days following warm weather typically produce the highest counts, while heavy rain temporarily clears the air.
Phoenix monthly allergy calendar
Typical month-by-month intensity for the four major airborne allergen categories in Phoenix.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tree | Mod | High | V.High | V.High | High | Mod | Low | Mod | High | High | Mod | Low |
| Grass | — | Low | Mod | High | High | V.High | V.High | High | High | Mod | Low | — |
| Weed | Low | Low | Mod | Mod | High | High | High | V.High | V.High | High | Mod | Low |
| Mold | Low | Low | Mod | Mod | Mod | Mod | High | High | Mod | Mod | Low | Low |
Most common local pollens — weeds
Most common airborne molds
Current PollyMap data for Phoenix
Official PollyMap Partner in Phoenix
Frequently asked questions about allergies in Phoenix
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Related guides
State Guide
Arizona Allergy Season Guide
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Tucson Allergy Season Guide
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Mesa Allergy Season Guide
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Chandler Allergy Season Guide
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Glendale Allergy Season Guide
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Scottsdale Allergy Season Guide
Library
Pollen species library
Library
Mold species library
Reports
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