Fremont, Ohio pollen forecast — Downtown Fremont Historic District neighborhood
Pollen Today
Today (20 September) pollen in Downtown Fremont Historic District, Fremont, Ohio is high; ragweed is high; grass is moderate; mugwort is low.
Pollen Tomorrow
Tomorrow (21 September 2026) grass declining, ragweed declining, mugwort no longer expected.
7-Day Trend
Over the next week grass, mugwort, and ragweed will increase.
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Pollen Risk
Today - 20 September
| 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) | Moderate | 37/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | Low | 6/100 |
| Ragweed (Ambrosia) | High | 53/100 |
Tomorrow - 21 September
| 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 | 21/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 36/100 |
Local Environmental Conditions
This area, hardly 150 meters distant, has the water's edge is thick with hazel and willow, whose pollen spreads readily in early spring. This area, positioned about 600-700m from the neighborhood, has a canopy of oak and birch, birch chief among them for allergenic potency here. Green space with maintained lawn and planted trees, both contributing to grass and ragweed counts; this sits only about 200 meters off.
The bank's hazel and willow kick off the pollen season ahead of the rest, climbing steadily from late winter into March. Oak and birch nearby take over the pollen calendar through mid-spring, generally peaking somewhere between April and May. Grass pollen takes over next, building to a peak around June, then yields to ragweed, the dominant late-summer and fall allergen through October.
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Frequently Asked Questions About Pollen in Ohio
Is pollen high in Fremont, Ohio right now?
On 20 September 2026, overall pollen levels in Fremont, Ohio are high. Ambrosia is the main contributor to airborne pollen, while grass and artemisia remain at lower levels
Will pollen levels change in Fremont, Ohio tomorrow?
On 21 September 2026, pollen conditions in Fremont, Ohio will be different from today, with ambrosia, grass continuing to decline
Is pollen expected to decrease in Fremont, Ohio 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 Fremont, Ohio?
On 20 September 2026, Ambrosia is the dominant pollen source in Fremont, Ohio. grass and artemisia are also present but at lower levels.
When is pollen season in Fremont, Ohio?
How often is the Fremont, Ohio pollen forecast updated?
The Fremont, Ohio pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Fremont, Ohio 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 Fremont, Ohio 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 Fremont, Ohio, 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 scores represent risk levels, not direct measurements of pollen or air pollutant concentrations. Higher scores indicate higher risk. Pollen and air quality use different thresholds.
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).
