
Dr. Woei Yeang Eng
Sanford Allergy and Asthma
Check today's pollen count by city in North Dakota. Explore local allergy forecasts, monitor common seasonal allergens, and use city-level trends to plan around high pollen days.
Allergy Ava organizes statewide and local pollen information so you can compare conditions, anticipate seasonal flare-ups, and find relevant allergy forecast pages faster.
Pollen levels in North Dakota can vary by city, weather, vegetation, and season. Choose a local forecast below to see the current allergy index, main allergen, and 5-day outlook for cities including Fargo, Bismarck, Grand Forks, Minot, West Fargo, Williston.
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Local allergy care
Use today's pollen forecast alongside nearby allergy and immunology profiles when symptoms need clinical follow-up, testing, or long-term treatment planning.

Sanford Allergy and Asthma
North Dakota allergy sufferers can use this page to monitor pollen trends and find relevant city forecasts when available. Pollen levels vary by season, with tree pollen often peaking in spring, grass pollen becoming more active in late spring and summer, and weed pollen, especially ragweed, remaining a concern in late summer and fall.
Use Allergy Ava's city-level forecasts to plan outdoor activities, manage medication timing, and stay informed about the allergens most prevalent in your area. Our data is updated regularly to give you the most accurate picture of current conditions.
Fargo and Grand Forks sit in the flatter, more humid Red River Valley, while Bismarck and Mandan have stronger Missouri River, central prairie, and dry-wind influence. Those differences can change tree timing, grass exposure, and ragweed severity.
Ragweed usually becomes more important in August as days shorten and can stay active until a hard freeze. It is common near field edges, roadsides, ditches, vacant lots, and disturbed soil.
Williston and Dickinson are more dryland and wind-exposed, with sagebrush, Russian thistle, grasses, dust, and open rangeland influence. Wind can make pollen and dust feel harsher than the count alone suggests.
Sustained freezes and snow cover usually shut down most outdoor pollen. Winter symptoms are more likely to come from indoor allergens, dry heated air, wood smoke, pets, or mold in damp indoor spaces.
Today's statewide signal
North Dakota allergy conditions are shaped by a short but active growing season, spring tree pollen, prairie wind, Red River Valley humidity, Missouri River corridors, grasslands, crop-country edges, and late-season ragweed. Compare Fargo, Bismarck, Grand Forks, Minot, West Fargo, Williston, Dickinson, and Mandan for local pollen levels, dominant allergens, weather context, and trend signals.
Data updates regularly to reflect current conditions across North Dakota cities.
Highest city index now
Fargo
Ragweed · Very High
5
Live city comparison
Sort North Dakota cities by pollen index, temperature, or trend. Select a city for its full local forecast.
| Main allergen | Weather context | ||||
|---|---|---|---|---|---|
| Fargo | 5Very High | Ragweed | Stable Tomorrow looks similar, near very high conditions. | 62°F | Mostly cloudy Humid air may keep ragweed and outdoor mold irritation active. |
| Grand Forks | 5Very High | Ragweed | Stable Tomorrow looks similar, near very high conditions. | 57°F | Clear Humid air may keep ragweed and outdoor mold irritation active. |
| Bismarck | 4High | Ragweed | Stable Tomorrow looks similar, near high conditions. | 61°F | Cloudy Humid air may keep ragweed and outdoor mold irritation active. |
| Minot | 4High | Ragweed | Stable Tomorrow looks similar, near high conditions. | 54°F | Partly cloudy Humid air may keep ragweed and outdoor mold irritation active. |
| West Fargo | 4High | Ragweed | Rising Forecast moves toward very high conditions tomorrow. | 62°F | Mostly cloudy Humid air may keep ragweed and outdoor mold irritation active. |
| Dickinson | 4High | Ragweed | Stable Tomorrow looks similar, near high conditions. | 56°F | Cloudy Humid air may keep ragweed and outdoor mold irritation active. |
| Mandan | 4High | Ragweed | Stable Tomorrow looks similar, near high conditions. | 60°F | Cloudy Humid air may keep ragweed and outdoor mold irritation active. |
| Williston | 0None | None | Rising Forecast moves toward very low conditions tomorrow. | 56°F | Clear with periodic clouds Outdoor pollen exposure looks limited for most people today. |
Ragweed is the main allergen
Pollen index
5
Trend
Stable
Humid air may keep ragweed and outdoor mold irritation active.
Ragweed is the main allergen
Pollen index
5
Trend
Stable
Humid air may keep ragweed and outdoor mold irritation active.
Ragweed is the main allergen
Pollen index
4
Trend
Stable
Humid air may keep ragweed and outdoor mold irritation active.
Ragweed is the main allergen
Pollen index
4
Trend
Stable
Humid air may keep ragweed and outdoor mold irritation active.
Ragweed is the main allergen
Pollen index
4
Trend
Rising
Humid air may keep ragweed and outdoor mold irritation active.
Ragweed is the main allergen
Pollen index
4
Trend
Stable
Humid air may keep ragweed and outdoor mold irritation active.
Ragweed is the main allergen
Pollen index
4
Trend
Stable
Humid air may keep ragweed and outdoor mold irritation active.
None is the main allergen
Pollen index
0
Trend
Rising
Outdoor pollen exposure looks limited for most people today.
Regional allergy forecast
The Red River Valley has flat terrain, shelterbelts, river-bottom trees, urban lawns, field edges, and humid storm tracks. Spring cottonwood and elm can give way to grass and ragweed as the valley warms.
Central North Dakota blends Missouri River cottonwoods, shelterbelt trees, open prairie, lawns, road ditches, and fast wind shifts. Grass and weed pollen can move quickly after dry fronts.
Western North Dakota has a drier, more open pattern shaped by prairie wind, Badlands edges, sagebrush country, dryland weeds, grasses, dust, and river corridors near the Missouri and Yellowstone systems.
State-specific pollen calendar
April to May
Cottonwood, elm, maple, ash, birch, oak, willow, and cedar or juniper can drive spring symptoms. A delayed thaw can compress the tree season into a short, sharp burst.
Late May to July
Bluegrass, timothy, fescue, rye, brome, lawns, parks, pasture, hay ground, and road ditches can raise grass pollen during warm, dry, windy periods.
August to hard freeze
Common ragweed, sagebrush, kochia, lamb’s quarters, Russian thistle, pigweed, dock, and marsh elder can drive late-season symptoms until hard freezes end the season.
November to March
Snow cover and repeated freezes usually suppress outdoor pollen, but dry indoor air, dust, pets, wood smoke, and mold in damp spaces can still bother sensitive residents.
Weather-pollen correlation
Wind can disperse pollen, rain can temporarily wash particles down, and humidity can increase mold irritation. The city table combines pollen and weather signals so users can compare outdoor risk without opening every city page.