High Pollen in Joliet, IL
High today, mostly weed pollen.
Last updated September 29, 2026
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).
Forecast
About pollen in Joliet
Weed pollen is running high in Joliet today, and it's the main driver of allergy discomfort right now. Anyone sensitive to ragweed and similar late-season weeds should expect noticeable symptoms, particularly if spending extended time outdoors. Looking ahead, weed pollen is expected to stay elevated over the next several days, holding at a high level for most of the stretch with only a brief dip to a more moderate range midweek. This lines up with the typical seasonal pattern for late September, when ragweed reaches its peak before tapering off with cooler weather. Tree pollen from familiar species like oak and maple is essentially dormant this time of year, so weeds remain the one to watch until the first hard frost arrives.
Common questions
- What is the pollen count in Joliet, IL today?
- Joliet, IL 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 3 to 4 of 5.
- Is weed pollen high in Joliet, IL right now?
- Weed pollen is high today at 4 of 5, and it's past its peak season. Many allergy sufferers will have symptoms.