Very Low Pollen in O'Fallon, MO
Very low today, mostly grass pollen.
Last updated July 21, 2026
What to do today
- Pollen levels are very low right now. It's a great day to enjoy the outdoors!
Forecast
About pollen in O'Fallon
Pollen levels in O'Fallon are quiet today. Grass is the only type registering, and it's sitting at a very low level, so most people should be able to get through the day without much notice, even those who tend to react to grass pollen. Looking ahead, conditions are expected to hold steady at this low level over the next few days, with no significant changes on the horizon. This lull fits the seasonal pattern: the region's oaks, maples, and other trees finished their peak pollen release back in spring, and while late summer typically brings a rise in weed pollen, especially ragweed, that surge hasn't arrived yet. For now, it's a comparatively calm stretch for allergy sufferers in the area.
Common questions
- What is the pollen count in O'Fallon, MO today?
- O'Fallon, MO is at a very low 1 out of 5 on the Universal Pollen Index today, driven mainly by grass pollen. The five-day outlook holds steady around 1 of 5.
- Is grass pollen high in O'Fallon, MO right now?
- Grass pollen is very low today at 1 of 5, and it's past its peak season. Most people won't notice it.