Grand Rapids pollen forecast — Heritage Hill neighborhood

On 25 June 2026, overall pollen levels in Grand Rapids are high. Grass is the main contributor to airborne pollen

On 26 June 2026, pollen conditions in Grand Rapids will be different from today, with grass continuing to decline

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

On 25 June 2026, Grass is the dominant pollen source in Grand Rapids. hazel, cypress, and willow are not currently active.

Grand Rapids Heritage Hill features the neighbourhood's characteristic street trees of linden, oak, and maple in this remarkable collection of Victorian and Edwardian historic homes. Surrounding Grand Rapids woodland and the Grand River valley contribute substantial tree and grass pollen, while birch peaks through May, grass peaks through June and July, and mugwort extends into September throughout this celebrated Grand Rapids Victorian heritage neighbourhood.

The Grand Rapids 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 Grand Rapids, 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.