ND · Allergy Season Guide
North Dakota Allergy Season Guide
North Dakota experiences a continental climate with hot, humid summers, cold winters, and frequent severe weather.
Summary
North Dakota has 0 active PollyMap collection sites, and is seeking partners in 5 additional cities. Tree pollen typically dominates early spring, grass pollen peaks in late spring and early summer, and weed pollen (including ragweed) extends from late summer through fall.
PollyMap collection status across North Dakota
Statewide allergy overview
North Dakota experiences a continental climate with hot, humid summers, cold winters, and frequent severe weather.
Elm, cedar, oak, and cottonwood lead the spring tree season. The plains have some of the highest ragweed counts in North America from August through October.
Wide-open agricultural land combined with summer humidity produces very high outdoor mold counts, especially Alternaria and Cladosporium after summer storms and harvest.
Allergy patterns vary by elevation and proximity to coast or mountains within North Dakota, but most of the state shares a common seasonal rhythm of spring tree pollen, summer grass pollen, and late-summer to fall weed pollen.
North Dakota allergy calendar
Month-by-month intensity for the four major airborne allergen categories.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tree | Low | Mod | V.High | V.High | High | Mod | Low | Low | Low | Low | Low | Low |
| Grass | — | — | Low | Mod | High | V.High | High | Mod | Low | Low | — | — |
| Weed | Low | Low | Mod | Mod | Mod | Mod | High | V.High | V.High | V.High | Mod | Low |
| Mold | Low | Low | Mod | Mod | High | High | V.High | V.High | V.High | High | Mod | Low |
Top tree pollens
Top weed pollens
Top airborne molds
Major city guides in North Dakota
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Fargo
View Fargo allergy season guide →
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Bismarck
View Bismarck allergy season guide →
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Grand Forks
View Grand Forks allergy season guide →
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Minot
View Minot allergy season guide →
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West Fargo
View West Fargo allergy season guide →
Latest PollyMap reports for North Dakota
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Frequently asked questions
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