Iowa City Pollen Forecast — Available Days
Daily values appear only when supplied by the data provider. A seasonal estimate is not a daily forecast.
Seasonal Allergen Guide for Iowa City
General seasonal information; this list does not show which pollen is elevated today.
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Mixed Trees
A mix of oak, maple, birch, and elm pollen peaks throughout spring.
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Grass
Grass pollen affects more americans than any other allergen — over 40 million people are sensitive to it.
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Ragweed
One ragweed plant can produce a billion pollen grains per season, and wind carries it 400+ miles.
Pollen Season Calendar — Iowa City
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Tree pollenGrass pollenRagweed
Peak pollen season in Iowa City: April–September
Pollen Count Iowa City — What You Need to Know
The pollen count in Iowa City peaks in April–September. The Midwest has clearly defined seasons: tree pollen in spring, grass in early summer, and ragweed dominating fall.
Why Is Pollen High in Iowa City?
The primary allergen is Mixed Trees — a mix of oak, maple, birch, and elm pollen peaks throughout spring. Pollen spikes on warm, dry, and windy days. Rain temporarily clears the air, but counts rebound fast.
Pollen Season in Iowa City
- Tree pollen — starts in early spring, peaks April–May. Birch, oak, and cedar are the biggest triggers.
- Grass pollen — peaks late spring through early summer. Affects over 40 million Americans.
- Ragweed — August through October. One plant releases a billion grains per season.
Frequently Asked Questions
What is the pollen count in Iowa City today?
Check the data status above for Iowa City. Provider forecast levels appear only when available. A seasonal estimate is not today's measured pollen count.
What type of pollen is high in Iowa City right now?
The seasonal guide does not establish which pollen is high right now. Current plant-specific levels are not supplied by the seasonal estimate.
When is pollen season in Iowa City?
Pollen season in Iowa City typically peaks in April–September. Tree pollen starts in early spring, followed by grass pollen in late spring through summer, and ragweed from August through October.
What should I do when pollen is high in Iowa City?
On high pollen days in Iowa City: check the forecast before going outside, schedule outdoor activities for the afternoon (pollen peaks 5–10 AM), keep windows closed and use AC, take antihistamines before exposure rather than after symptoms start, and shower after spending time outdoors to remove pollen from skin and hair.
How accurate is the pollen forecast for Iowa City?
Provider forecasts are estimates, not measurements at your address. When provider data is unavailable, this page may show a broad seasonal estimate. Missing daily forecasts remain blank; no accuracy guarantee is made.