Philadelphia pollen forecast — Philadelphia Museum of Art neighborhood

On 22 August 2026, overall pollen levels in Philadelphia are moderate. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels

On 23 August 2026, pollen conditions in Philadelphia will be different from today, with grass, ambrosia, artemisia increasing

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

On 22 August 2026, Ambrosia is the dominant pollen source in Philadelphia. grass and artemisia are also present but at lower levels. cypress are not currently active.

As a landmark within Philadelphia, Philadelphia Museum of Art follows the same seasonal pollen curve, opening with cedar and elm from late February before oak peaks during April. Grass pollen then peaks through May and June, and a late-summer weed pollen tail runs into September. Humid summers in the mid-Atlantic favor a longer weed pollen tail into early autumn, consistent with the wider Philadelphia area.

The Philadelphia 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 Philadelphia, 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.