Pollen today
Loading today’s values…
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 Madison 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 1:47 pm CT.
We’re getting pollen alert emails ready. Sign up now and we’ll email you when they start for Madison.
Each thread is one kind of pollen, and each square is one week, colored by that week’s highest level.
Google has given no index for Madison since records began on October 14, 2026.
Highest level each week, November 2025 to November 2026, from each day’s forecast.
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 Madison 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 10.2% of adults in the city of Madison have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 9.1% to 11.4%). It is a statistical estimate from national survey data, not a count.
20 allergists enrolled in Medicare practice in the Madison area: 2.82 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 Madison 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.
Glaciers shaped central and eastern Dane County, leaving moraines, drumlins and the Yahara Lakes around Madison, while the county’s western side lies in the Driftless Region, which the last ice age’s glaciers never reached.2 In general, summer is the county’s wettest season and winter its driest.2 At the airport, a typical year brings about 37 inches of precipitation and about 160 days between the last spring freeze and the first fall freeze.1
Wisconsin State Climatology Office data show the growing season lengthening across the state since 1970, with the biggest change, 34 days, in Madison.3 An urban forest inventory run by the USDA Forest Service and the Wisconsin Department of Natural Resources estimates that Madison has 2.9 million trees.4 Many are small buckthorn, and Norway maple, honeylocust and white oak lead the large trees.4
A 2011 study of ragweed pollen seasons across central North America drew on 27 years of Madison records.5 By its estimate, the local season ran 12 days longer in 2009 than in 1995, a change the study did not mark as significant.5
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in Madison today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Madison. 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 Madison, so each day starts with its own values, and again after Google’s daily model run, usually by about 9:30 am CT. Each section shows when its values were retrieved.
Source: Includes pollen data from GoogleIncludes data from Google Maps