Horten kommune pollen forecast - today, tomorrow and the week ahead
Today (9 August) pollen in Horten kommune is medium; mugwort is medium; cypress and grass are low. Tomorrow (10 August 2026) levels are similar. Over the following five days grass and mugwort will increase; cypress will decrease. Forecasts are calculated by Airmine using satellites to map local vegetation and determine pollen season onset.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Set along the western Oslofjord shore on the Vestfold coast, Horten 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 Oslofjord position means onshore winds can periodically disperse pollen, while the mild coastal Vestfold climate advances the season compared to more inland eastern Norwegian municipalities throughout.
Today - 9 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
15/100
-
Grass (Poaceae):
Low
7/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
40/100
High pollen levels may trigger sneezing, itchy eyes, and congestion. Airmine's neighbourhood estimates use satellites to map local vegetation and a statistical prediction model, updated four times daily.
Tomorrow - 10 August
-
Alder (Alnus):
None
0/100
-
Birch (Betula):
None
0/100
-
Hazel (Corylus):
None
0/100
-
Cypress (Cupressaceae):
Low
16/100
-
Grass (Poaceae):
Low
8/100
-
Willow (Salicaceae):
None
0/100
-
Mugwort (Artemisia):
Medium
44/100
Air quality in Horten kommune
View air qualityFrequently Asked Questions
Is pollen high in Horten kommune right now?
On 9 August 2026, overall pollen levels in Horten kommune are moderate. Artemisia is the main contributor to airborne pollen, while cypress and grass remain at lower levels
Will pollen levels change in Horten kommune tomorrow?
On 10 August 2026, pollen conditions in Horten kommune will be similar to today, with artemisia at medium levels, cypress at low levels, grass at low levels
Is pollen expected to decrease in Horten kommune this week?
According to the five-day outlook, cypress pollen levels are expected to gradually decrease, while artemisia and grass pollen will increase, suggesting mixed conditions later in the week.
Which pollen types are currently active in Horten kommune?
On 9 August 2026, Artemisia is the dominant pollen source in Horten kommune. cypress and grass are also present but at lower levels. hazel and willow are not currently active.
When is pollen season in Horten kommune?
How often is the Horten kommune pollen forecast updated?
The Horten kommune pollen forecast is updated four times daily. See the timestamp below for the most recent update.
Does pollen in Horten 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 Horten 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 Horten 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.
Want to see pollen forecasts for other cities in Norway?
Check pollen in other popular cities:
Data provided by Airmine — Last update: 10 August 2026 at 02:34 CEST (Data is updated four times daily.)
This page provides the latest public pollen forecast for Horten kommune.
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Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.