Lengby pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Lengby is low; ragweed is low.
Pollen Tomorrow
Tomorrow (21 September 2026) ragweed increasing.
7-Day Trend
Over the next week grass and ragweed will increase; mugwort will remain stable.
Explore Forecasts
Air Quality
Pollen for Neighborhoods
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 - 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) | None | 0/100 |
| Willow (Salicaceae) | None | 0/100 |
| Mugwort (Artemisia) | None | 0/100 |
| Ragweed (Ambrosia) | Low | 25/100 |
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) | None | 0/100 | |
| Willow (Salicaceae) | None | 0/100 | — |
| Mugwort (Artemisia) | None | 0/100 | |
| Ragweed (Ambrosia) | Moderate | 30/100 |
Local Environmental Conditions
Around Lengby, nearby, in the vicinity, hazel and willow thrive along the damp bank, both prolific early wind-pollinators. Woodland dominated by oak and birch, with birch a leading regional tree-pollen allergen, nearby. Located in the surrounding area, this area has this park's mix of turf and landscaped trees contributes a modest grass and ragweed pollen load.
For Lengby, oak and birch in the woodland come next, through the heart of spring, topping out in the April-to-May stretch. Hazel and willow near the water open the pollen calendar early, topping out well before most other trees start releasing pollen, around February and March. As spring turns to summer, grass pollen rises toward its June high, followed by ragweed's own peak stretch from mid-August into October.
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.
Resource Hub
Pollen forecast neighborhoods 1 neighborhood
Frequently Asked Questions About Pollen in Minnesota
Is pollen high in Lengby right now?
On 20 September 2026, overall pollen levels in Lengby are low. Ambrosia is the main contributor to airborne pollen
Will pollen levels change in Lengby tomorrow?
On 21 September 2026, pollen conditions in Lengby will be different from today, with ambrosia increasing
Is pollen expected to decrease in Lengby this week?
According to the five-day outlook, ambrosia and grass pollen levels will increase later in the week.
Which pollen types are currently active in Lengby?
On 20 September 2026, Ambrosia is the dominant pollen source in Lengby. artemisia and grass are not currently active.
When is pollen season in Lengby?
How often is the Lengby pollen forecast updated?
The Lengby pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Lengby 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 Lengby 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 Lengby, 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).
