High Pollen in Olathe, KS

High today, mostly weed pollen.

Last updated September 30, 2026

Today's index4out of 5High
GrassVery Lowoff-season
WeedHighin season

Driving it today

Ragweed

Forecast

Thu
1
Fri
4
Sat
4
Sun
4

About pollen in Olathe

Weed pollen is the dominant force in Olathe today, reaching levels that will be noticeable to nearly anyone with sensitivities, not just those with severe allergies. Grass pollen, by contrast, is barely present and shouldn't cause much concern. For those affected by ragweed and similar late-season weeds, today calls for extra attention to symptoms and possibly limiting time outdoors during peak hours. Looking ahead, weed pollen should ease somewhat over the next couple of days before climbing again toward the end of the five-day window, so those sensitive to it should expect an up-and-down stretch rather than steady relief. Grass pollen is expected to remain quiet throughout. This pattern fits the season well: early fall is peak time for ragweed and other weeds across the Midwest, while tree pollen from species like oak, elm, and maple remains dormant until spring returns.

What to do today

  • Avoid mowing the lawn and raking leaves.
  • When driving the car, close your windows and turn the air conditioning system to recirculation mode.
  • Keep your windows closed and turn on your air purifier or air conditioning.
  • Consider staying indoors during the peak pollen hours (morning and early afternoon).

Common questions

What is the pollen count in Olathe, KS today?
Olathe, KS is at a high 4 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. Over the next five days it ranges from 1 to 4 of 5.
Is weed pollen high in Olathe, KS right now?
Weed pollen is high today at 4 of 5, and it's in season now. Many allergy sufferers will have symptoms.
What plants are causing allergies in Olathe, KS?
The main sources right now are Ragweed. Ragweed (Asteraceae (the daisy family), Late summer, fall) is actively pollinating.