High Pollen in Boise, ID
High today, mostly weed pollen.
Last updated August 15, 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 the dominant force in Boise's air today, reaching a high level that is likely to be noticeable for anyone who deals with seasonal sensitivities. Trees are quiet right now, so if you are feeling stuffy or itchy-eyed this week, weeds are almost certainly the cause. Looking ahead, this pattern is expected to hold steady over the next several days, with weed pollen remaining high and tree pollen staying absent. This lines up with typical mid-August conditions in the region, when species like ragweed and sagebrush tend to dominate the pollen picture well after spring's cottonwood, elm, and juniper trees have finished releasing their pollen. If weeds tend to affect you, it may be worth planning outdoor activities with that in mind for the time being.
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.
- What plants are causing allergies in Boise, ID?
- Elm (Ulmaceae (the Elm family), Two distinct seasons, late winter to early spring, and late summer to fall (species dependent)) is actively pollinating.