High Pollen in Greeley, CO
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 Greeley
Weed pollen is running high in Greeley today, and it is the main driver of overall pollen levels in the area. Anyone with sensitivities to ragweed and similar late-season weeds should expect noticeable symptoms, particularly if spending extended time outdoors, as this is the most active pollen source right now. Looking ahead, weed pollen is expected to ease slightly over the next several days but will likely remain at a moderate to noticeable level through the week. This lines up with typical seasonal patterns, as ragweed and other weeds tend to dominate the pollen picture in late summer and into fall, well after the spring peak for trees like cottonwood, elm, and juniper, and after grasses have wound down from their early-summer high point. For now, weeds remain the primary concern for allergy sufferers in the region.
Common questions
- What is the pollen count in Greeley, CO today?
- Greeley, CO 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 Greeley, CO right now?
- Weed pollen is high today at 4 of 5, and it's past its peak season. Many allergy sufferers will have symptoms.