Pollen today
Loading today’s values…
Ragweed is low in Fresno today.
Ragweed should ease to very low on Wednesday.
Today in Fresno, CaliforniaTuesday, November 3
Weed2LowRagweed
TreeNo index
GrassNo index
Next four days, highest level each day:
Wed1Very low
Thu1Very low
Fri1Very low
Sat1Very low
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 Fresno today. A plant out of season has no index.
Plants in FresnoTuesday, November 3
Ragweed2Low
AlderNo index
AshNo index
BirchNo index
CottonwoodNo index
ElmNo index
GrassesNo index
JuniperNo index
MapleNo index
OakNo index
PineNo index
Source: Includes pollen data from GoogleGoogle Maps
Weather and air in Fresno
The forecast that moves pollen around, and the air beside it.
Why today
Wind should be light, up to 5 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
- This Afternoon
- Mostly Sunny. High 71 °F. Wind SW 5 mph. 4% chance of precipitation.
- Tonight
- Mostly Clear. Low 52 °F. Wind NW 5 mph. 4% chance of precipitation.
Forecast: National Weather Service, updated 11:56 am PT.
Pollen alerts for Fresno by email
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Fresno’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 Fresno 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 | Not recorded | 1 Very low | 2 Low |
| Oct 21 to Oct 27 | Not recorded | 1 Very low | 2 Low |
| Oct 14 to Oct 20 | Not recorded | 1 Very low | 2 Low |
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 Fresno 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 Fresno
An estimated 10.1% of adults in the city of Fresno have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 9.0% to 11.4%). It is a statistical estimate from national survey data, not a count.
Allergists in the Fresno area
16 allergists enrolled in Medicare practice in the Fresno area: 1.33 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 Fresno 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.
Fresno’s pollen seasons
The geography, climate and plants behind each season here, with a source for every fact.
Sierra Nevada foothills rise about 15 miles east of Fresno, and the Diablo Range lies some 55 miles west, across the flat floor of the San Joaquin Valley.2 Summers at the airport average about 81 °F, and about 11 inches of rain and other precipitation falls in a typical year.1 About 90 percent of it falls from November through April.2
In 1910, W. L. Jepson reported 400 square miles of valley oak woodland covering the eastern San Joaquin Valley.3 Valley oak is found only in California; it is wind pollinated, and its catkins emerge in March and April.3 Extensive urban development and farming have significantly altered the valley’s landscape.2
Winds in the valley often blow from the northwest, along its axis.2 In years with little winter rain, blowing dust becomes common on windy days.2 Bermuda grass, found throughout California below about 2,900 feet outside the Great Basin, blooms from June through September.4
Sources
- U.S. Climate Normals 1991–2020: Fresno Yosemite International Airport (USW00093193). NOAA National Centers for Environmental Information. Read on October 15, 2026.
- The Climate of Fresno, California (NOAA Technical Memorandum NWS WR-280). National Weather Service. Read on October 15, 2026.
- Quercus lobata. USDA Forest Service, Fire Effects Information System. Read on October 15, 2026.
- Bermudagrass, Weeds Identification Gallery. UC Statewide Integrated Pest Management Program, University of California. Read on October 15, 2026.
Questions about pollen in Fresno
Answered from the values on this page.
Is pollen high in Fresno today?
No. The highest level in Fresno today, Tuesday, November 3, is low (2 on the 0 to 5 index), led by ragweed. Weed pollen is low.
Which pollen is in the air in Fresno today?
According to Google’s model: Ragweed (low). Plants Google doesn’t model, and mold, aren’t included.
Will pollen be higher tomorrow in Fresno?
No. Google’s forecast for tomorrow, Wednesday, is very low (1 on the 0 to 5 index), down from today’s low. Over the next four days, the highest forecast is very low, 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 Fresno. 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 Fresno, so each day starts with its own values, and again after Google’s daily model run, usually by about 7:30 am PT. Each section shows when its values were retrieved.
How long has AllergyNest recorded pollen in Fresno?
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