East Gwillimbury pollen forecast — Harvest Hills neighborhood
Today (30 August) pollen in Harvest Hills, East Gwillimbury is moderate; ragweed is moderate; grass and mugwort are low. Tomorrow (31 August 2026) levels are similar. Over the following five days grass, mugwort, and ragweed will increase. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
Get the full experience in the Airmine app.
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Follow your pollen exposure and performance with the free Airmine–Strava integration. See your pollen and air quality exposure for every Strava activity.
Nearby, in the surrounding area, the nearest stream or river hosts hazel and willow, two of the most allergenic early-season trees. A canopy of oak and birch, birch chief among them for allergenic potency here, just outside the immediate area. A stretch of mown parkland where turf and ornamental trees feed local grass and ragweed pollen, in the wider area.
Today - 30 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
14/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
6/100
-
Ragweed (Ambrosia):
Moderate
47/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 31 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
None
0/100
-
Grass (Poaceae):
Low
19/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Low
8/100
-
Ragweed (Ambrosia):
Moderate
50/100
Other Landmarks in East Gwillimbury
Frequently Asked Questions
Is pollen high in East Gwillimbury right now?
On 30 August 2026, overall pollen levels in East Gwillimbury are moderate. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in East Gwillimbury tomorrow?
On 31 August 2026, pollen conditions in East Gwillimbury will be similar to today, with ambrosia at moderate levels, artemisia at low levels, grass at low levels
Is pollen expected to decrease in East Gwillimbury this week?
According to the five-day outlook, ambrosia, artemisia, and grass pollen levels will increase later in the week.
Which pollen types are currently active in East Gwillimbury?
On 30 August 2026, Ambrosia is the dominant pollen source in East Gwillimbury. artemisia and grass are also present but at lower levels. cypress are not currently active.
When is pollen season in East Gwillimbury?
How often is the East Gwillimbury pollen forecast updated?
The East Gwillimbury pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in East Gwillimbury come from nearby or far away?
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.
Are pollen levels in East Gwillimbury based on measurements or forecasts?
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 East Gwillimbury, 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.
Check pollen in other popular cities:
Data provided by Airmine — Last update: 30 August 2026 at 20:26 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Harvest Hills, East Gwillimbury.
Get the full experience in the Airmine app.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
Some text on this page may be generated or summarised using artificial intelligence (AI). Wherever possible, AI-generated content is enriched with Airmine's proprietary data to improve its accuracy and relevance. However, AI-generated content may still contain errors, omissions, or inaccuracies.