Montréal pollen forecast — Lachine neighborhood

On 9 August 2026, overall pollen levels in Montréal are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia remain at lower levels

On 10 August 2026, pollen conditions in Montréal will be similar to today, with ambrosia at medium levels, artemisia at low levels

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

On 9 August 2026, Ambrosia is the dominant pollen source in Montréal. artemisia are also present but at lower levels. cypress and grass are not currently active.

Bordering the Saint Lawrence River with historic canal-side industry, Lachine experiences a river-moderated pollen season, with canal greenery and mature streets driving a solid spring tree bloom, while nearby parkland sustains a fairly typical grass pollen presence through summer.

The Montréal 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 Montréal, 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.