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 Manchester 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 1:13 pm ET.
We’re getting pollen alert emails ready. Sign up now and we’ll email you when they start for Manchester.
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 Manchester 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 Manchester 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 11.2% of adults in the city of Manchester have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 10.0% to 12.3%). It is a statistical estimate from national survey data, not a count.
8 allergists enrolled in Medicare practice in the Manchester area: 1.85 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 Manchester 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.
A third of Manchester’s street trees were maples in a 1997 survey by the New Hampshire Community Tree Steward Program, sponsored by UNH Cooperative Extension.2 Red maple led at 13%, followed by Norway maple at 12% and spruce at 11%.2 Oaks made up 10% of the trees and white pine 5%.2
A 1947 pollen study by the New Hampshire State Department of Health described three pollen seasons in the state.3 Trees such as elm, maple, willow, poplar, birch and oak shed pollen from late March or early April to about June 1.3 Grasses such as fescues, timothy, orchard grass and redtop, along with plantain and dock, followed from about June 1 to the middle of July.3 Common ragweed led the last season, from about mid-August to the end of the growing season.3 The study found ragweed mostly in waste ground around human settlements, growing heaviest in the centers of the largest cities and towns.3
At Manchester’s airport, winters average about 28 °F.1 A typical year there brings 180 days between the last spring freeze and the first fall freeze.1
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in Manchester today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Manchester. 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 Manchester, 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