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 New Haven 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 2:04 pm ET.
We’re getting pollen alert emails ready. Sign up now and we’ll email you when they start for New Haven.
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 New Haven 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 New Haven 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 11.6% of adults in the city of New Haven have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 10.5% to 12.8%). It is a statistical estimate from national survey data, not a count.
10 allergists enrolled in Medicare practice in the New Haven area: 1.73 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 New Haven 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.
About one in four street trees in New Haven is a Norway maple.2 Known as the “Elm City,” New Haven once had streets lined with elms, and when they died they were replaced with Norway maple.2 Pin oak is also among the most common street trees.2
In 2023, the Urban Resources Initiative counted 4,614 street trees in the Newhallville and Westville neighborhoods.3 The five most abundant in Westville were Norway maple, pin oak, red maple, lindens and honeylocust.3 In Newhallville, the five most counted were pin oak, zelkova, Norway maple, London planetree and lindens.3
Across Connecticut, coastal areas have warmer winters and longer frost-free seasons than inland areas.4 New Haven, on the coast, averages 4 days a year above 90 °F and 1 day below 0 °F.4 At Tweed Airport, a typical year brings 193 days between the last spring freeze and the first fall freeze, and winters average about 33 °F.1
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in New Haven today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central New Haven. 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 New Haven, 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.
Source: Includes pollen data from GoogleIncludes data from Google Maps