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 Bismarck 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 1:21 pm CT.
We’re getting pollen alert emails ready. Sign up now and we’ll email you when they start for Bismarck.
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 Bismarck 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 Bismarck 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 9.9% of adults in the city of Bismarck have current asthma, according to the CDC’s PLACES estimate for 2023 (95% confidence interval: 8.8% to 11.2%). It is a statistical estimate from national survey data, not a count.
2 allergists enrolled in Medicare practice in the Bismarck area: 1.43 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 Bismarck 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 136 days separate the last spring freeze from the first fall freeze in a typical Bismarck year, which gives plants roughly four and a half months to grow.1 Winters average about 16 °F, and precipitation totals about 19 inches in an average year.1 In North Dakota, American elm is one of the first trees to flower in spring, and it is wind-pollinated, according to NDSU Extension’s forester.4
Since 2008, the city of Bismarck has cut the share of ash among its boulevard trees from 36% to 22%.2 Green ash has been widely planted in the Plains States.3 In the northern part of its range it flowers from late April to early May, and wind carries its pollen.3
Across North Dakota, western wheatgrass has been recorded in flower in June and July.5 NDSU Extension calls kochia, a weed of pastures, rangeland, roadsides and crop fields, a main contributor to fall hay fever; it generally flowers from July to September.6 Absinth wormwood, a member of the sagebrush family, flowers from late July through mid-August in North Dakota, and the same guide notes it as a pollen source for allergies.6
Answered from the values on this page.
Very little. None of the plants Google models is above 0 in Bismarck today.
No. It’s Google’s modeled pollen index, from 0 (none) to 5 (very high), calculated for the location of central Bismarck. 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 Bismarck, 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