Worst air pollution Karlstad, today and tomorrow
Today (16 July): Air quality in Karlstad is medium. AQI and O3 are medium; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 5:00 PM (O3: 41.1/100).
Tomorrow (17 July 2026): Air quality in Karlstad is fair. AQI worsens to fair; O3 increases to fair; all other pollutants stay as today. Pollution peaks around 6:00 PM (O3: 35.8/100). 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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Karlstad's air quality is generally good by Swedish standards, with the Värmland lake district's consistent Baltic and Scandinavian airflows providing reliable ventilation. Vehicle traffic on the E18 motorway and surrounding manufacturing and forest industry contribute local sources, while Lake Vänern's open water to the south provides additional ventilation and consistent Baltic airflows generally maintain Karlstad among Sweden's more moderate inland urban environments throughout the year.
Today - 16 July | Pollution peaks at 17:00
AQI:
Medium
41.1/100
PM2.5 (fine particles):
Good
15.5/100
PM10 (coarse particles):
Good
4.9/100
NO2 (nitrogen dioxide):
Good
7.5/100
O3 (ozone):
Medium
41.1/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
6.8/100
PM1 (ultrafine particles):
Good
17.1/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 18:00
AQI:
Fair
35.8/100
PM2.5 (fine particles):
Good
12.4/100
PM10 (coarse particles):
Good
4.1/100
NO2 (nitrogen dioxide):
Good
6.4/100
O3 (ozone):
Fair
35.8/100
SO2 (sulfur dioxide):
Good
0.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.6/100
PM1 (ultrafine particles):
Good
13.9/100
Pollen forecast in Karlstad
View pollen forecastAir quality forecasts for neighbourhoods and landmarks in Karlstad
Frequently Asked Questions
Is air quality bad in Karlstad right now?
On 16 July 2026, overall air quality in Karlstad is medium. AQI is the main air quality indicator at 41.1/100. Pollution peaks around 5:00 PM (O3: 41.1/100).
Will air quality be worse tomorrow in Karlstad?
On 17 July 2026, air quality conditions in Karlstad will be worse than today, with AQI forecast at fair at 35.8/100. Pollution peaks around 6:00 PM (O3: 35.8/100).
When is air pollution at its worst in Karlstad?
How does air quality change throughout the year in Karlstad? Winter is generally when local emissions build up most, since cold, stagnant air limits how quickly wood-smoke and exhaust clear. Conditions usually start improving from March as wind and rain become more frequent, helping clear out whatever built up over winter. The year's most consistently good air usually falls in summer, when heating season has ended and ventilation improves. As autumn progresses, damp, still evenings can occasionally trap emissions before winter's more persistent inversions set in. This pattern is fairly typical for central Sweden, where all four seasons are clearly distinct.
Are air quality levels in Karlstad 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