Pollen today
Loading today’s values…
Ragweed is high in Tucson today.
Grass pollen is very low. Ragweed should stay high through Wednesday.
Today in Tucson, ArizonaTuesday, November 3
Weed4HighRagweed
Grass1Very lowGrasses
TreeNo index
Next four days, highest level each day:
Wed4High
Thu3Moderate
Fri3Moderate
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 Tucson today. A plant out of season has no index.
Plants in TucsonTuesday, November 3
Grasses1Very low
AlderNo index
AshNo index
BirchNo index
CottonwoodNo index
ElmNo index
JuniperNo index
MapleNo index
OakNo index
PineNo index
Source: Includes pollen data from GoogleGoogle Maps
Weather and air in Tucson
The forecast that moves pollen around, and the air beside it.
Weather forecast
- This Afternoon
- Sunny. High 75 °F. Wind NE 6 mph.
- Tonight
- Mostly Clear. Low 50 °F. Wind SSE 2 to 8 mph.
Forecast: National Weather Service, updated 11:32 am MST.
Pollen alerts for Tucson by email
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Tucson’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 Tucson 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 | 1 Very low | 4 High |
| Oct 21 to Oct 27 | 0 None | 1 Very low | 4 High |
| Oct 14 to Oct 20 | 0 None | 1 Very low | 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 Tucson 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 Tucson
An estimated 11.3% of adults in the city of Tucson have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 10.2% to 12.4%). It is a statistical estimate from national survey data, not a count.
Allergists in the Tucson area
14 allergists enrolled in Medicare practice in the Tucson area: 1.30 for every 100,000 people, more 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 Tucson 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.
Tucson’s pollen seasons
The geography, climate and plants behind each season here, with a source for every fact.
Pima County, home to Tucson, has written pollen control into its landscape codes, a University of Arizona extension column reported in 2004.2 The column said the codes prohibited sales of mulberry trees and pollen-producing olive varieties, and required common bermudagrass to be mowed regularly to reduce excessive flowering.2 A county procedure for its own projects, revised in 2022, states that the Pima County Health Department prohibits Texas mulberry and fruiting European olive trees.3
A typical year at Tucson International Airport brings about 307 days between the last spring freeze and the first fall freeze.1 Only about 11 inches of rain and other precipitation falls in an average year.1
In a study published in 1990, mulberry was the most common pollen type collected in urban Tucson, and it nearly tripled the yearly urban pollen total.4 Pollen from mountain plants, including alder, oak, Artemisia and, in summer, pine, reached the city and the surrounding desert.4 The same researcher’s 1986 dissertation found that mulberry, ragweed and its relatives, grasses, chenopods and pigweeds characterize Tucson’s airborne pollen.5
Sources
- U.S. Climate Normals 1991–2020: Tucson International Airport (USW00023160). NOAA National Centers for Environmental Information. Read on October 15, 2026.
- Pollen and Allergies. University of Arizona Cooperative Extension. Read on October 15, 2026.
- Administrative Procedure 51-3: Plant Materials Salvage and Selection for Pima County Projects. Pima County. Read on October 15, 2026.
- Comparative pollen calendars from Tucson, Arizona: Durham vs. Burkard samplers. Aerobiologia (University of Arizona research portal). Read on October 15, 2026.
- The Implications of Atmospheric Pollen Rain for Fossil Pollen Profiles in the Arid Southwest. University of Arizona (doctoral dissertation). Read on October 15, 2026.
Questions about pollen in Tucson
Answered from the values on this page.
Is pollen high in Tucson today?
Yes. The highest level in Tucson today, Tuesday, November 3, is high (4 on the 0 to 5 index), led by ragweed. Weed pollen is high and grass pollen is very low.
Which pollen is in the air in Tucson today?
According to Google’s model: Ragweed (high) and grasses (very low). Plants Google doesn’t model, and mold, aren’t included.
Will pollen be higher tomorrow in Tucson?
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 Tucson. 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 Tucson, 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 Tucson?
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