Cincinnati pollen forecast — West Fourth Street Historic District neighborhood

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

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

According to the five-day outlook, artemisia and 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. artemisia and grass are also present but at lower levels. cypress are not currently active.

Hazel and willow near the water open the pollen calendar early, climbing steadily from late winter into March. Woodland oak and birch pick up the pace next, through mid-to-late spring, generally peaking somewhere between April and May. Grass pollen takes over next, building to a peak around June, followed by ragweed's own peak stretch from mid-August into 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.