Boulder pollen forecast — Chautauqua Park neighborhood

On 16 July 2026, overall pollen levels in Boulder are moderate. Grass is the main contributor to airborne pollen, while ambrosia remain at lower levels

On 17 July 2026, pollen conditions in Boulder will be different from today, with oak at low levels, ambrosia at low levels, grass at medium levels

According to the five-day outlook, oak, ambrosia, and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

On 16 July 2026, Grass is the dominant pollen source in Boulder. ambrosia are also present but at lower levels. oak, willow, alder, artemisia, birch, and cypress are not currently active.

As a landmark within Boulder, Chautauqua Park follows the same seasonal pollen curve, opening with juniper and cottonwood from March then ash builds through April. Grass follows, peaking through May and June, while grass and sagebrush extend exposure into September. Low humidity and high elevation mean pollen disperses easily once released, consistent with the wider Boulder area.

The Boulder pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Boulder, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.