Low Pollen in Chicago, IL
Low today, mostly weed pollen.
Last updated September 29, 2026
What to do today
- It's a good day for outdoor activities since pollen levels are low.
- Do you know which plants cause your pollen allergy? Check out the pollen data to be prepared.
Forecast
About pollen in Chicago
Weed pollen is the only type in play in Chicago today, and levels remain on the low side. Most people should get through the day without much irritation, though those who are especially sensitive to ragweed and similar late-season weeds may notice mild symptoms, particularly outdoors in the afternoon. Looking ahead, weed pollen is expected to hold steady at this same low level through the next several days, so no significant changes are on the horizon. This fits the seasonal pattern for late September, as ragweed continues its typical fall run before tapering off with the first hard frost. Tree pollen, which usually comes from oaks, maples, and elms in this region, is dormant until spring, and grass pollen has already wound down for the year.
Common questions
- What is the pollen count in Chicago, IL today?
- Chicago, IL is at a low 2 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. The five-day outlook holds steady around 2 of 5.
- Is weed pollen high in Chicago, IL right now?
- Weed pollen is low today at 2 of 5, and it's past its peak season. Most people won't have symptoms.