Dayton Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (10 October) pollen in Dayton is low; grass, mugwort, and ragweed are low.
Pollen Tomorrow
Tomorrow (11 October 2026) grass remains low, ragweed remains low, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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Features and forecast availability vary by region.
Pollen Risk
Today - 10 October
| Pollen species | Level | Value |
|---|---|---|
| Alder (Alnus) | None | 0/100 |
| Birch (Betula) | None | 0/100 |
| Hazel (Corylus) | None | 0/100 |
| Cypress (Cupressaceae) | None | 0/100 |
| Grass (Poaceae) | Low | 15/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 4/100 |
| Ragweed (Ambrosia) | Low | 20/100 |
Tomorrow - 11 October
| Pollen species | Level | Value | 7-Day Trend |
|---|---|---|---|
| Alder (Alnus) | None | 0/100 | — |
| Birch (Betula) | None | 0/100 | — |
| Hazel (Corylus) | None | 0/100 | — |
| Cypress (Cupressaceae) | None | 0/100 | — |
| Grass (Poaceae) | Low | 1/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Low | 5/100 |
Local Environmental Conditions
Built-up land and woodland share the area around the center of Dayton, plus some open grassland. With the Great Miami River nearby, riverside vegetation along its banks contributes to the local mix. Woodland on all sides makes trees an important local pollen source. There is plenty of grass pollen here too.
Tree pollen comes first, peaking in mid-spring. Grass pollen follows, peaking in late spring and easing off by early fall. A smaller weed peak follows from early summer into early fall. By late fall, as temperatures fall to around 5°C, pollen levels are low again. Dry, sunny and breezy weather raises levels within each period, and steady rain brings them down.
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Resource Hub
Pollen forecast neighborhoods 19 neighborhoods
Sports venues in Dayton 2 sports venues
Local events 1 event
Frequently Asked Questions About Pollen in Ohio
Is pollen high in Dayton right now?
On 10 October 2026, overall pollen levels in Dayton are low. Ambrosia is the main contributor to airborne pollen, while artemisia and grass remain at lower levels
Will pollen levels change in Dayton tomorrow?
On 11 October 2026, pollen conditions in Dayton will be different from today, with ambrosia at low levels, grass at low levels
Is pollen expected to decrease in Dayton 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 Dayton?
On 10 October 2026, Ambrosia is the dominant pollen source in Dayton. artemisia and grass are also present but at lower levels.
When is pollen season in Dayton?
How often is the Dayton pollen forecast updated?
The Dayton pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Dayton 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 Dayton 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 Dayton, 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.
Understanding the Scale
The 0–100 pollen scores represent risk levels, not direct pollen measurements. Higher scores indicate higher risk.
Pollen
| None | 0 | No or negligible risk of exposure. Pollen/mold exposure is expected to be minimal. |
| Low | 0-25 | Low risk of exposure. Small amounts of pollen or mold spores may be present. |
| Moderate | 25-50 | Moderate risk of exposure. Pollen/mold exposure is expected to be noticeable. |
| High | 50-75 | High risk of exposure. Elevated pollen/mold exposure is expected. |
| Very High | 75-100 | Very high risk of exposure. Pollen/mold exposure is expected to be at or near its highest levels. |
Get More in the Airmine Pollen app
Get 15-day pollen forecasts with morning, afternoon and evening detail, plus 5-day air quality forecasts. Explore interactive pollen risk maps, estimated pollen season start, route profiles and a symptoms diary.
Features and forecast availability vary by region. Currently covering Europe, the contiguous US, southern Canada, South Africa, Australia, Indonesia (Java & Bali), Brazil, Paraguay, Uruguay and the Buenos Aires area.
Developed with support from the European Space Agency (ESA) Business Applications and Space Solutions (BASS).
