Pollen today
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Pollen today
Loading today’s values…
Google gave no index for tree, grass or weed pollen here today.
Next four days, highest level each day:
Source: Includes pollen data from GoogleGoogle Maps
Source: Includes pollen data from GoogleIncludes data from Google Maps
Google’s index for each plant it models in Washington today. A plant out of season has no index.
Source: Includes pollen data from GoogleGoogle Maps
The forecast that moves pollen around, and the air beside it.
Forecast: National Weather Service, updated 9:52 am ET.
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Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Records for Washington began on October 14, 2026. Each week adds a square.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
| Week | Tree | Grass | Weed |
|---|---|---|---|
| Oct 28 to Nov 3 | Not recorded | Not recorded | 1 Very low |
| Oct 21 to Oct 27 | Not recorded | Not recorded | 2 Low |
| Oct 14 to Oct 20 | Not recorded | Not recorded | 2 Low |
Source: Includes pollen data from GoogleIncludes data from Google Maps
What this forecast doesn’t measure, and when to get help.
Google’s index covers tree, grass and weed pollen only, so there is no mold level for Washington 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.
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.
An estimated 10.4% of adults in the city of Washington have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 9.3% to 11.6%). It is a statistical estimate from national survey data, not a count.
131 allergists enrolled in Medicare practice in the Washington area: 2.03 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 Washington 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.
The geography, climate and plants behind each season here, with a source for every fact.
American beech, red maple and boxelder were the most common trees in a Forest Service study of Washington’s urban forest, published in 2006.2 The study estimated about 1,928,000 trees in the city, with canopy covering 28.6 percent of its area.2
Red maple is one of the first trees to flower in early spring, and in neighboring Maryland it flowers from March to April.3 Boxelder trees are either male or female, and they flower with or before their leaves from March to May, depending on location.4 Wind pollinates the drooping female flowers.4
Ragweed appears on University of Maryland Extension’s list of the most common fall weeds in Maryland lawns and gardens.5 A single common ragweed plant can produce up to a billion pollen grains, and wind can carry the light grains up to 400 miles.6 Its pollen release peaks by late summer and ends with a killing frost.6 At Reagan National Airport, a typical year has about 241 days between the last spring freeze and the first fall freeze, and winters average about 40 °F.1
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in Washington today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Washington. 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.
Twice a day. We fetch new values soon after midnight in Washington, so each day starts with its own values, and again after Google’s daily model run, usually by about 10:30 am ET. Each section shows when its values were retrieved.
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