City of Johnstown pollen forecast — Industrial Park neighborhood

On 30 August 2026, overall pollen levels in City of Johnstown are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels

On 31 August 2026, pollen conditions in City of Johnstown will be different from today, with ambrosia at high levels, grass at moderate levels and artemisia increasing

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 30 August 2026, Ambrosia is the dominant pollen source in City of Johnstown. grass and artemisia are also present but at lower levels. cypress are not currently active.

Hazel and willow by the water are typically first out of the gate, topping out well before most other trees start releasing pollen, around February and March. Late spring sees grass pollen build steadily toward a peak in June, before ragweed's late-summer surge carries the season into October. Actual peak timing can drift earlier or later depending on how the season's weather plays out.

The City of Johnstown 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 City of Johnstown, 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.