Oslo Half Marathon - Pollen and Air Quality Forecast for Today
Pollen levels are low to medium today, with grass and cypress as the main active species. Air quality along the route is fair. O3 (23.7/100) and NO2 (22.1/100) are fair. The remaining pollutants stay at good levels. Based on Airmine's forecast, which uses satellite data to calculate exposure every 200 metres along the route, air quality is at its worst 10.2 km after start. Pollen exposure peaks at 6.2 km after start.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
Oslo Half Marathon runs through the Oslo city streets and the Frognerparken area in this major Norwegian road race, with birch, oak, and linden as the main tree pollen sources along the urban route. The September race date falls after the main birch and grass season, while mugwort from surrounding Oslo woodland and farmland can still contribute in September and the Oslofjord proximity means onshore winds can periodically disperse residual pollen throughout this classic Norwegian capital half marathon.
Today - 16 July
Pollen
Alder (Alnus):
None
0/100
Birch (Betula):
None
0/100
Hazel (Corylus):
None
0/100
Cypress (Cupressaceae):
Low
15/100
Grass (Poaceae):
Medium
38/100
Willow (Salicaceae):
None
0/100
Oak (Quercus):
None
0/100
Mugwort (Artemisia):
None
0/100
Mulberry (Morus):
None
0/100
Eucalyptus (Myrtaceae):
None
0/100
Plane (Platanus):
None
0/100
Nettle (Urtica):
None
0/100
Acacia (Acacia):
None
0/100
Ragweed (Ambrosia):
None
0/100
Air Quality
PM2.5 (fine particles):
Good
10.2/100
PM10 (coarse particles):
Good
3.3/100
NO2 (nitrogen dioxide):
Fair
22.1/100
O3 (ozone):
Fair
23.7/100
SO2 (sulfur dioxide):
Good
1.2/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
7.9/100
PM1 (ultrafine particles):
Good
11.8/100
Levels show the highest exposure along the full route
Other routes:
Frequently Asked Questions
Where is air quality worst on the Oslo Half Marathon route?
Based on today's forecast, O3 is forecast at fair levels along the route today (23.7/100). Air quality is at its worst after 10.2 km into the route. Airmine calculates exposure at 200m intervals along the course using satellite-derived atmospheric data.
Where is pollen highest on the Oslo Half Marathon course?
Pollen exposure peaks at km 4.0 today. This changes through the season as different pollen species become active.
When is pollen worst during the Oslo Half Marathon season?
September coincides with peak grass season. Grass pollen typically rises in May-June.
How often is this forecast updated?
Updated four times daily. See the timestamp below for the most recent update.
Are pollen levels in Oslo Half Marathon 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 Oslo Half Marathon, 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.
Levels show the highest exposure along the full route. Airmine uses satellite data to calculate pollen and air quality every 200 metres along each race route, updated four times daily.
Data provided by Airmine — Last update: 16 July 2026 at 10:33 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibiity.