Cleveland pollen forecast - today, tomorrow and the week ahead

On 9 August 2026, overall pollen levels in Cleveland 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 Cleveland will be similar to today, with ambrosia at medium levels, artemisia at low levels, grass at low levels

According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.

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

Cleveland's pollen season opens with maple and elm from late February, followed by oak and birch through April and May. Grass pollen peaks through June and July, with ragweed contributing into September. Lake Erie onshore breezes can periodically moderate pollen levels, while surrounding Ohio farmland and woodland contribute substantial grass and tree pollen. The lake-effect climate means more frequent cloud cover and precipitation than inland Ohio cities.

The Cleveland 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 Cleveland, 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.