Downtown Lewiston Pollen Forecast - Today, Tomorrow and the Week Ahead
Pollen Today
Today (11 October) pollen in Downtown Lewiston is low; mold (alternaria) and mold (cladosporium) are low.
Pollen Tomorrow
Tomorrow (12 October 2026) mold (alternaria) remains low, mold (cladosporium) remains low, mugwort at low levels, ragweed at low levels.
7-Day Trend
Over the next week mugwort and ragweed will increase; mold (alternaria) and mold (cladosporium) will decrease; grass will remain stable.
Explore Forecasts
Air Quality & Mold
Pollen in Other Cities
Air Quality in Other Cities
Get More in Our App
Local pollen and air quality forecasts, interactive pollen maps and route profiles
Features and forecast availability vary by region.
Pollen Risk
Today - 11 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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | None | 0/100 |
| Mold (Alternaria) | Low | 3/100 |
| Mold (Cladosporium) | Low | 11/100 |
Tomorrow - 12 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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | Low | 4/100 | |
| Ragweed (Ambrosia) | Low | 6/100 | |
| Mold (Alternaria) | Low | 5/100 | |
| Mold (Cladosporium) | Low | 14/100 |
Local Environmental Conditions
The area around the heart of Downtown Lewiston is mostly built-up land, with a good deal of woodland. With the Androscoggin River nearby, riverside vegetation along its banks contributes to the local mix. Common allergenic trees nearby include maple. Locally, planted trees and mown lawns are the main sources in the built-up parts.
Tree pollen peaks in mid-spring, when the weather warms to around 5°C and maple is in full flower. Then come the grasses, strongest in early summer and fading by late summer. Warm, damp weather from early summer into early fall also raises mold spore levels. By late fall, as temperatures fall to around 5°C, pollen levels are low again.
Get pollen & AQ on Strava
Follow your environmental exposure and performance with the free Airmine-Strava integration. See your pollen and air quality exposure for every Strava activity.
Frequently Asked Questions About Pollen in Maine
Is pollen high in Downtown Lewiston right now?
Currently, there is no significant pollen in Downtown Lewiston.
Will pollen levels change in Downtown Lewiston tomorrow?
On 12 October 2026, pollen conditions in Downtown Lewiston will be different from today, with ambrosia at low levels, artemisia at low levels
Is pollen expected to decrease in Downtown Lewiston this week?
According to the five-day outlook, ambrosia and artemisia pollen levels will increase later in the week.
Which pollen types are currently active in Downtown Lewiston?
On 11 October 2026, there are no significant pollen types in Downtown Lewiston.
When is pollen season in Downtown Lewiston?
How often is the Downtown Lewiston pollen forecast updated?
The Downtown Lewiston pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Downtown Lewiston 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 Downtown Lewiston 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 Downtown Lewiston, 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).
