Cincinnati pollen forecast — Hartwell neighborhood

On 9 August 2026, overall pollen levels in Cincinnati are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels

On 10 August 2026, pollen conditions in Cincinnati will be similar to today, with grass at low levels, ambrosia at medium levels, artemisia at low levels

According to the five-day outlook, grass pollen levels are expected to gradually decrease, while ambrosia pollen will increase, suggesting mixed conditions later in the week.

On 9 August 2026, Ambrosia is the dominant pollen source in Cincinnati. grass and artemisia are also present but at lower levels. cypress are not currently active.

The water-adjacent hazel and willow are early risers, usually peaking sometime between late winter and the end of March. Oak and birch in the nearby woodland follow in mid-to-late spring, climbing steadily through spring to a peak in April or May. Late spring sees grass pollen build steadily toward a peak in June, and then ragweed picks up the slack, running from mid-August through October.

The Cincinnati 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 Cincinnati, 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.