Porsgrunn kommune pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Porsgrunn kommune 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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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
Lying on the Grenland fjord in Telemark, Porsgrunn opens the pollen season with hazel from January before birch peaks through April and May. Grass from surrounding farmland peaks through June and July before mugwort extends exposure into September. The Frierfjord position means onshore winds can periodically disperse pollen, while the mild coastal Telemark climate advances the season compared to more inland Telemark municipalities throughout.
Porsgrunn kommune's pollen calendar is bookended by February and August, with the first releases of alder and hazel from February, before birch takes over with a strong peak lasting through May. Grass pollen then carries the season over June and July. With the relatively mild Oslofjord-adjacent climate near Porsgrunn kommune, the local climate adds a distinct local flavour to how the wider Norwegian season plays out.
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Frequently Asked Questions About Pollen in Telemark
Is pollen high in Porsgrunn kommune right now?
Currently, there is no significant pollen in Porsgrunn kommune.
Will pollen levels change in Porsgrunn kommune tomorrow?
On 21 September 2026, pollen conditions in Porsgrunn kommune will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Porsgrunn kommune this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Porsgrunn kommune?
On 20 September 2026, there are no significant pollen types in Porsgrunn kommune.
When is pollen season in Porsgrunn kommune?
How often is the Porsgrunn kommune pollen forecast updated?
The Porsgrunn kommune pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Porsgrunn kommune 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 Porsgrunn kommune 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 Porsgrunn kommune, 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).
