Phoenix, AZ Grass Pollen
Grass pollen in Phoenix usually peaks around April to September, reaching Moderate at its worst. Phoenix has an allergy season that runs most of the year, driven by desert trees. Juniper and cypress start in winter, olive and mulberry peak in spring, and mesquite carries into early summer. These trees are so allergenic that the city restricts planting some of them.
Bermuda grass keeps counts up from spring into early summer across Phoenix lawns and medians.
Grass in Phoenix today
Monday, July 27, 2026
Grass pollen by month in Phoenix
How grass usually runs across the year. The current month is outlined.
Managing grass season in Phoenix
If grass is your trigger, start a daily antihistamine like cetirizine (Zyrtec) or loratadine (Claritin) a week or two before the April to September peak, rather than waiting for symptoms. Keep windows closed on high-count mornings, shower and change clothes after time outside, and run the AC on recirculate in the car.
When symptoms don't ease with over-the-counter medicine, an allergist in Arizona can test whether grass is really what you react to and talk through longer-term options like allergy shots.
Sources
More pollen in Phoenix
- Phoenix olive pollen — peaks April.
- Phoenix juniper pollen — peaks January to February.
- Phoenix mulberry pollen — peaks March.
- Phoenix mesquite pollen — peaks April to May.
- Phoenix pollen calendar — every allergen, month by month.
- Phoenix pollen count today — live tree, grass, and weed levels with a 5-day forecast.
- Arizona pollen season — the statewide calendar and other cities.
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Sign up for free alertsSeasonal pattern based on Arizona pollen data and local sources. Today's reading updated daily. MyPollenPal