When is allergy season in South Dakota?

Allergy season in South Dakota typically runs from late winter through fall. Tree pollen rises first, followed by grass pollen in late spring and early summer, and weed pollen (especially ragweed) in late summer and fall.

What pollen is highest in South Dakota?

In South Dakota, the highest-pollen species are typically Elm, Cedar, Oak in spring, Bluegrass grass in early summer, and Ragweed in fall.

What months are worst for allergies in South Dakota?

For most people, April and May (tree pollen) and September (ragweed) are the most difficult months in South Dakota, with grass pollen creating a third peak in June.

Does South Dakota have mold allergies?

Yes. The region's climate supports both outdoor and indoor mold exposure — particularly Alternaria, Cladosporium. Outdoor mold spore counts often rise after rain and in fall when leaves decay.

How can clinics become PollyMap collection partners?

Qualified allergy clinics, naturopathic offices, universities, and environmental health professionals can apply to host a PollyKit and become an official PollyMap collection partner. Applications are reviewed by the PollyMap team.

SD · Allergy Season Guide

South Dakota Allergy Season Guide

South Dakota experiences a continental climate with hot, humid summers, cold winters, and frequent severe weather.

View local reports Become a collection partner

Summary

South 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 South Dakota

Active

Pending

Seeking Partner

Statewide allergy overview

South 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 South 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.

South 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 grass pollens

Top weed pollens

Top airborne molds

Major city guides in South Dakota

Sioux Falls

Seeking Partner

View Sioux Falls allergy season guide →

Rapid City

Seeking Partner

View Rapid City allergy season guide →

Aberdeen

Seeking Partner

View Aberdeen allergy season guide →

Brookings

Seeking Partner

View Brookings allergy season guide →

Watertown

Seeking Partner

View Watertown allergy season guide →

Latest PollyMap reports for South Dakota

PollyMap is currently recruiting collection partners in this state. No locally-collected reports have been published yet.

Frequently asked questions

Get local pollen alerts for South Dakota.

Subscribe to PollyMap email alerts and be notified when new local reports are published in your area.

Subscribe to alerts