Karlshus pollen forecast - today, tomorrow and the week ahead
Pollen Today
Today (20 September) pollen in Karlshus 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
Karlshus is a small Østfold village in Råde municipality on the Råde coastal plain where birch, hazel, and farmland edge vegetation are the main local pollen sources. The flat, open southeastern Norwegian landscape allows pollen to disperse widely, while the relatively dry Østfold climate means fewer rainfall interruptions than in western Norway and birch peaks through April and May before grass contributes through June and July and mugwort extends into September.
Pollen in Karlshus covers the period from February through August, with an early alder and hazel signal from about February, before birch pollen takes hold most strongly before easing after May. Karlshus then sees grass pollen continue across June and July. With the relatively mild Oslofjord-adjacent climate near Karlshus, the local climate means the exact timing here can shift a little from year to year.
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Frequently Asked Questions About Pollen in Østfold
Is pollen high in Karlshus right now?
Currently, there is no significant pollen in Karlshus.
Will pollen levels change in Karlshus tomorrow?
On 21 September 2026, pollen conditions in Karlshus will be similar to today with no significant pollen expected.
Is pollen expected to decrease in Karlshus this week?
According to the five-day outlook, pollen levels are expected to remain relatively stable.
Which pollen types are currently active in Karlshus?
On 20 September 2026, there are no significant pollen types in Karlshus.
When is pollen season in Karlshus?
How often is the Karlshus pollen forecast updated?
The Karlshus pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Karlshus 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 Karlshus 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 Karlshus, 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).
