Bethlehem pollen forecast — Bethlehem Heights neighborhood

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

On 31 August 2026, pollen conditions in Bethlehem will be different from today, with ambrosia at high levels, grass at moderate levels and artemisia continuing to decline

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

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

Grass pollen becomes the dominant allergen through late spring, peaking in June, handing off to ragweed, which peaks from mid-August through October. Neighboring parts of the county typically see this same sequence with only minor timing shifts. The overall order of species tends to hold steady, even as exact dates shift slightly each year.

The Bethlehem 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 Bethlehem, 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.