Worst air pollution Hønefoss, today and tomorrow
Today (16 July): Air quality in Hønefoss is fair. O3 is fair; AQI and NO2 are medium; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 6:00 AM (NO2: 41.7/100).
Tomorrow (17 July 2026): Air quality in Hønefoss is fair. AQI worsens to fair; NO2 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (O3: 34.1/100). Airmine updates local air quality forecasts four times daily.
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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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Hønefoss's air quality reflects the Begna and Randselva river confluence position in Ringerike, with vehicle traffic on the RV35 and surrounding manufacturing, paper, and logistics operations contributing local sources. The Tyrifjord lake breezes and the river valley corridor provide ventilation, while winter inversions in the enclosed valley can concentrate vehicle and heating emissions and the surrounding Nordmarka forest provides clean-air buffering throughout most of the year.
Today - 16 July | Pollution peaks at 06:00
AQI:
Medium
41.7/100
PM2.5 (fine particles):
Good
14.8/100
PM10 (coarse particles):
Good
4.4/100
NO2 (nitrogen dioxide):
Medium
41.7/100
O3 (ozone):
Fair
37.6/100
SO2 (sulfur dioxide):
Good
1.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
16.3/100
PM1 (ultrafine particles):
Good
18.3/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Fair
34.1/100
PM2.5 (fine particles):
Good
10.8/100
PM10 (coarse particles):
Good
3.5/100
NO2 (nitrogen dioxide):
Fair
24.7/100
O3 (ozone):
Fair
34.1/100
SO2 (sulfur dioxide):
Good
2.0/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.4/100
PM1 (ultrafine particles):
Good
12.1/100
Pollen forecast in Hønefoss
View pollen forecastFrequently Asked Questions
Is air quality bad in Hønefoss right now?
On 16 July 2026, overall air quality in Hønefoss is fair. O3 is the main pollutant at 37.6/100. Pollution peaks around 6:00 AM (NO2: 41.7/100).
Will air quality be worse tomorrow in Hønefoss?
On 17 July 2026, air quality conditions in Hønefoss will be similar to today, with AQI forecast at fair at 34.1/100. Pollution peaks around 6:00 PM (O3: 34.1/100).
When is air pollution at its worst in Hønefoss?
Hønefoss typically sees the sharpest drop in air quality when temperature inversions settle in overnight, when temperature inversions over the flat farmland trap local emissions close to the ground. This part of eastern Norway generally sees decent background air quality overall. Apart from these spells, Hønefoss generally enjoys favourable air quality.
Are air quality levels in Hønefoss based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
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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 responsibility.
For long term forecasts and maps, see the Airmine app