Pollen today
Loading today’s values…
Ragweed is high in Phoenix today.
Grass pollen is low and tree pollen is none. Ragweed should stay high through Saturday.
Today in Phoenix, ArizonaTuesday, November 3
Weed4HighRagweed
Grass2LowGrasses
Tree0None
Next four days, highest level each day:
Wed4High
Thu4High
Fri4High
Sat4High
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Plant by plant
Google’s index for each plant it models in Phoenix today. A plant out of season has no index.
Plants in PhoenixTuesday, November 3
Grasses2Low
AlderNo index
AshNo index
BirchNo index
CottonwoodNo index
JuniperNo index
MapleNo index
OakNo index
PineNo index
Source: Includes pollen data from GoogleGoogle Maps
Weather and air in Phoenix
The forecast that moves pollen around, and the air beside it.
Why today
Wind should be light, up to 0 mph. Hay fever symptoms are often less noticeable on windless days, when pollen doesn’t move around as much. Source: American Academy of Allergy, Asthma & Immunology.
Weather forecast
- Today
- Sunny. High 75 °F. Wind 0 mph.
- Tonight
- Partly Cloudy. Low 56 °F. Wind 0 mph.
Forecast: National Weather Service, updated 10:52 am MST.
Pollen alerts for Phoenix by email
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Phoenix’s year in pollen
Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Records for Phoenix began on October 14, 2026. Each week adds a square.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
Tree
Grass
Weed
0 None1 Very low2 Low3 Moderate4 High5 Very highThis weekNot recorded
See it as a table
| Week | Tree | Grass | Weed |
|---|---|---|---|
| Oct 28 to Nov 3 | 0 None | 2 Low | 4 High |
| Oct 21 to Oct 27 | 0 None | 3 Moderate | 4 High |
| Oct 14 to Oct 20 | 0 None | 3 Moderate | 5 Very high |
Source: Includes pollen data from GoogleIncludes data from Google Maps
Beyond today’s pollen
What this forecast doesn’t measure, and when to get help.
No mold level
Google’s index covers tree, grass and weed pollen only, so there is no mold level for Phoenix on this page. The National Allergy Bureau publishes pollen and mold counts measured at its stations. Our guides cover common molds such as Alternaria, Cladosporium and Aspergillus.
No indoor allergens
The forecast doesn’t cover allergens indoors either: dust mites, cockroaches, mice, cats and dogs. Our guides explain each one, starting with dust mites and cats.
Asthma in Phoenix
An estimated 10.3% of adults in the city of Phoenix have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 9.4% to 11.3%). It is a statistical estimate from national survey data, not a count.
Allergists in the Phoenix area
54 allergists enrolled in Medicare practice in the Phoenix area: 1.03 for every 100,000 people, fewer than the 1.22 across the US. The count doesn’t show how soon you can get an appointment. See the doctors listed in the Phoenix area, or how every state and metro compares.
AllergyNest count from CMS’s Doctors and Clinicians file (October 2026) and Census population estimates for 2025.
Phoenix’s pollen seasons
The geography, climate and plants behind each season here, with a source for every fact.
No freeze interrupts a typical year at Phoenix Sky Harbor International Airport, so plants can grow in every month.1 Rain is scarce, with only about 7 inches of rain and other precipitation in an average year.1 A 2024 University of Arizona extension column said Arizona’s only official pollen observation station was at the Mayo Clinic in Scottsdale.2
Bringing exotic species into landscapes can make the allergen problem worse, the same column notes, and it has led various communities to ban planting olive and mulberry trees.2 Tempe’s city code prohibits planting or replacing pollen-producing olive and mulberry trees.3 Varieties that are pollenless and fruitless, such as the ‘Swan Hill’ olive, may still be planted there.3 Goodyear’s code also prohibits planting or replacing pollen-producing olive and mulberry trees.4
Sources
- U.S. Climate Normals 1991–2020: Phoenix Sky Harbor International Airport (USW00023183). NOAA National Centers for Environmental Information. Read on October 15, 2026.
- Pollen Allergies (Backyard Gardener #136). University of Arizona Cooperative Extension. Read on October 15, 2026.
- City Code Violations: Trees. City of Tempe. Read on October 15, 2026.
- Goodyear Code of Ordinances § 27-1-4, Prohibited tree species. City of Goodyear. Read on October 15, 2026.
Questions about pollen in Phoenix
Answered from the values on this page.
Is pollen high in Phoenix today?
Yes. The highest level in Phoenix today, Tuesday, November 3, is high (4 on the 0 to 5 index), led by ragweed. Weed pollen is high, grass pollen is low and tree pollen is none.
Which pollen is in the air in Phoenix today?
According to Google’s model: Ragweed (high) and grasses (low). Plants Google doesn’t model, and mold, aren’t included.
Will pollen be higher tomorrow in Phoenix?
No. Google’s forecast for tomorrow, Wednesday, is high (4 on the 0 to 5 index), the same as today. Over the next four days, the highest forecast is high, on Wednesday.
Is this a pollen count?
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Phoenix. A pollen count is the number of pollen grains measured in a cubic meter of air at a counting station. How our pollen index works.
When does this page update?
Twice a day. We fetch new values soon after midnight in Phoenix, so each day starts with its own values, and again after Google’s daily model run, usually by about 8:30 am MST. Each section shows when its values were retrieved.
How long has AllergyNest recorded pollen in Phoenix?
Since October 14, 2026. The year in pollen above fills in as each day is recorded, and weeks before then show no data. Google doesn’t provide past values, so nothing earlier can be added.
Source: Includes pollen data from GoogleIncludes data from Google Maps