Moderate Pollen in Dayton, OH

Moderate today, mostly weed pollen.

Last updated September 29, 2026

Today's index3out of 5Moderate
WeedModeratein season

Driving it today

Ragweed

Forecast

Wed
4
Thu
4
Fri
N/A
Sat
N/A

About pollen in Dayton

Weed pollen is the main driver of today's outdoor air in Dayton, sitting at a moderate level. This will likely be noticeable if you're sensitive to it, though most people should get through the day without much disruption. Tree and grass pollen aren't factoring into the picture right now. Looking ahead, weed pollen is expected to hold steady before ticking up to a higher, more bothersome level over the next couple of days. This tracks with the season — early fall is peak time for ragweed and other late-season weeds across the Dayton area, well after the spring surge from trees like oak and maple, and the early-summer grass pollen has already wound down. If you're prone to weed allergies, it's a good stretch to keep that in mind as the numbers climb.

What to do today

  • It's important to shower and wash your hair after spending a lot of time outdoors.
  • When spending time outside, use sunglasses and a cap to keep pollen out of your face and eyes.
  • Wash clothes worn outdoors to remove any remnants of pollen grains.
  • If possible, wear glasses instead of contact lenses.
  • Did you hang any laundry outside? Now is a good time to hang clothes indoors or use a dryer if possible.

Common questions

What is the pollen count in Dayton, OH today?
Dayton, OH is at a moderate 3 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. Over the next five days it ranges from 3 to 4 of 5.
Is weed pollen high in Dayton, OH right now?
Weed pollen is moderate today at 3 of 5, and it's in season now. Sensitive people may notice symptoms.
What plants are causing allergies in Dayton, OH?
The main sources right now are Ragweed. Ragweed (Asteraceae (the daisy family), Late summer, fall) is actively pollinating.