High Pollen in Boise, ID
High today, mostly weed pollen.
Last updated September 30, 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 Boise
Weed pollen is dominating the air in Boise today, with levels running high. This is the time of year when ragweed and related weeds are most active, and sensitive individuals will likely notice symptoms outdoors, especially during dry, breezy afternoons when pollen disperses more easily. Looking ahead, weed pollen is expected to hold steady at this high level through the next several days, so there is little relief in sight for now. This lines up with the typical fall pattern in the region, as weed pollen tends to peak in late summer and into autumn before tapering off with cooler weather. Tree pollen, which usually comes from species like cottonwood, maple, and oak, is not a factor this time of year, since that season runs in spring.
Common questions
- What is the pollen count in Boise, ID today?
- Boise, ID is at a high 4 out of 5 on the Universal Pollen Index today, driven mainly by weed pollen. The five-day outlook holds steady around 4 of 5.
- Is weed pollen high in Boise, ID right now?
- Weed pollen is high today at 4 of 5, and it's past its peak season. Many allergy sufferers will have symptoms.