Pollen Season Calendar — Dayton
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Tree pollenGrass pollenRagweed
Peak pollen season in Dayton: April–September
Pollen Count Dayton — What You Need to Know
The pollen count in Dayton 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 Dayton?
The primary allergen is Oak — oak trees release enormous amounts of fine pollen — a leading cause of spring allergies across the US. Pollen spikes on warm, dry, and windy days. Rain temporarily clears the air, but counts rebound fast.
Pollen Season in Dayton
- 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 Dayton today?
The current pollen count in Dayton is updated every 12 hours using live data. Levels are rated Low, Moderate, High, or Very High based on pollen concentration in the air. Select the live badge above for today's reading.
What type of pollen is high in Dayton right now?
The primary allergen in Dayton is Oak. Peak pollen season in Dayton runs from April–September. The 'Active Allergens' section above shows which specific pollens are currently elevated.
When is pollen season in Dayton?
Pollen season in Dayton 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 Dayton?
On high pollen days in Dayton: 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 Dayton?
The pollen forecast for Dayton is based on the Google Pollen API, which combines real-time sensor data, weather forecasts, and plant biology models. Forecasts are updated every 12 hours and are generally accurate within 1 level (e.g., Moderate vs. High). Actual counts can vary by neighborhood depending on local vegetation.