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Gathering pollen, air quality, and weather data for you.
Pollen Level
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Air Quality
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Harwood Heights's allergy season is compressed but intense, running from April through October. The flat, agricultural landscape around Harwood Heights, IL produces significant grass and ragweed pollen during peak months.
Right now: August kicks off ragweed season in Harwood Heights. The Midwest is the US ragweed belt — counts can be extreme.
Spring
Apr – May
Tree pollen season is short but intense — oak, elm, and ash dominate.
Summer
May – Jul
Grass pollen peaks in June. Agricultural regions see elevated counts.
Fall
Aug – Oct
Ragweed is the dominant allergen. The Midwest is a major ragweed zone.
The flat terrain near Harwood Heights allows pollen to travel long distances on the wind. Cold fronts can temporarily drop counts, but warm spells bring rapid pollen surges. PollenTracker monitors these daily shifts.
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Google UPI 0/5
Weather
76°F
Cloudy · 89% humidity · 3 mph wind
YES
Conditions are manageable, but Tree pollen is moderate and air quality is fair. Most people can head out with light precautions.
Pollen: Tree pollen risk is medium today; source reading: Google UPI 1/5 (Very Low).
Best hours: 18:00-20:00
Hourly pollen risk is estimated from weather trends when no live hourly pollen feed is available.
Informational only. Not medical advice. For health concerns, please consult a qualified healthcare provider. Editorial standards.