Harrisburg pollen forecast — River Mile 73 Campsite B neighborhood

On 30 August 2026, overall pollen levels in Harrisburg are moderate. Artemisia is the main contributor to airborne pollen, while grass and ambrosia remain at lower levels

On 31 August 2026, pollen conditions in Harrisburg will be different from today, with artemisia, grass, ambrosia continuing to decline

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

On 30 August 2026, Artemisia is the dominant pollen source in Harrisburg. grass and ambrosia are also present but at lower levels. cypress are not currently active.

The waterside hazel and willow are consistently first to release pollen each year, usually peaking sometime between late winter and the end of March. The area's oak and birch trees pollinate through mid-to-late spring, usually hitting its highest point sometime between mid-April and mid-May. Late spring brings rising grass pollen that crests in June, handing off to ragweed, which peaks from mid-August through October.

The Harrisburg 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 Harrisburg, 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.