Pollen Level
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Air Quality
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Gathering pollen, air quality, and weather data for you.
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Pollen Level
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Air Quality
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Gathering pollen, air quality, and weather data for you.
Gathering pollen, air quality, and weather data for you.
Pollen Level
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Air Quality
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Weather
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Hamilton's pollen season runs from April through October, with three main allergen waves. Long winters keep early-year counts low, but spring melt triggers a fast tree-pollen ramp-up across Hamilton, Ontario.
Right now: June brings grass pollen into peak in Hamilton. This is typically the worst month for grass-allergic Canadians.
Spring
Apr – Jun
Tree pollen from birch, maple, oak, and alder. Birch is a leading trigger in central Canada.
Summer
Jun – Aug
Grass pollen peaks in June and July — timothy, ryegrass, and Kentucky bluegrass dominate.
Fall
Aug – Oct
Ragweed is the dominant fall allergen across southern Canada — pollen can travel hundreds of kilometres.
Conditions vary across Hamilton — urban heat islands tend to extend pollen seasons by 1-2 weeks. PollenTracker uses live data plus the official Canadian AQHI scale so the air-quality number matches what you'd see on WeatherCAN or your local news.
Open another nearby forecast without going back to the map.
CAUTION
Grass pollen is high at 250 grains/m³, but winds are light and air quality is decent. Take precautions — the safest hours are later in the day.
Pollen: Grass pollen is high today at 250 grains/m³.
Lower-risk hours: 11:00-13:00
Weather
13°C
Sunny · 59% humidity · 6 km/h wind
~5 grains/m³