Lohja pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Lohja is none
Pollen Tomorrow
Tomorrow (21 September 2026) levels are similar to today.
7-Day Trend
Over the next week cypress, grass, willow, and mugwort will remain stable.
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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 |
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 |
Local Environmental Conditions
In Uusimaa, Lohja lies amid forested lake terrain west of Helsinki; local vegetation is dominated by birch and willow, and grass pollen from the wider countryside pushes totals higher as spring turns to summer. Exposure differs meaningfully between the town centre and its greener edges, with the surrounding Uusimaa land contributing an additional, steadier layer of grass pollen through the warmer months.
From an early alder and hazel start, Lohja moves into a birch and willow peak before grass pollen extends the season into early summer, with the April-to-August window covering the year's exposure in this part of Uusimaa. the short northern summer limits late-season pollen exposure here, a pattern shaped in part by the town's position amid forested lake terrain west of Helsinki.
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Frequently Asked Questions About Pollen in Uusimaa
Is pollen high in Lohja right now?
Currently, there is no significant pollen in Lohja.
Will pollen levels change in Lohja tomorrow?
On 21 September 2026, pollen conditions in Lohja will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Lohja this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Lohja?
On 20 September 2026, there are no significant pollen types in Lohja.
When is pollen season in Lohja?
How often is the Lohja pollen forecast updated?
The Lohja pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Lohja 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 Lohja 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 Lohja, 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).
