Worst air pollution Jena, today and tomorrow
Today (18 August): Air quality in Jena is fair. AQI, NO2, O3, and PM1 are fair; PM2.5, PM10, SO2, CO, and HCHO are good. Pollution peaks around 5:00 PM (O3: 24.7/100).
Tomorrow (19 August 2026): Air quality in Jena is fair. AQI improves to medium; PM2.5 increases to fair; NO2 decreases to medium; all other pollutants stay as today. Pollution peaks around 11:00 PM (NO2: 45.0/100). Airmine updates local air quality forecasts four times daily.
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Jena's air quality reflects the Saale river valley's topographic enclosure between the Thuringian Forest uplands, with vehicle traffic on the A4 motorway and the surrounding optical precision and university research industry contributing local sources. The valley's partial enclosure concentrates emissions under calm winter conditions, while Atlantic westerlies provide the primary ventilation corridor.
Today - 18 August | Pollution peaks at 17:00
AQI:
Fair
24.7/100
PM2.5 (fine particles):
Good
17.3/100
PM10 (coarse particles):
Good
4.6/100
NO2 (nitrogen dioxide):
Fair
22.0/100
O3 (ozone):
Fair
24.7/100
SO2 (sulfur dioxide):
Good
2.8/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
4.1/100
PM1 (ultrafine particles):
Fair
23.2/100
Levels show the poorest local air quality during the day
Tomorrow - 19 August | Pollution peaks at 23:00
AQI:
Medium
45.0/100
PM2.5 (fine particles):
Fair
26.9/100
PM10 (coarse particles):
Good
7.3/100
NO2 (nitrogen dioxide):
Medium
45.0/100
O3 (ozone):
Fair
25.7/100
SO2 (sulfur dioxide):
Good
3.1/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
9.5/100
PM1 (ultrafine particles):
Fair
33.8/100
Pollen forecast in Jena
View pollen forecastFrequently Asked Questions
Is air quality bad in Jena right now?
On 18 August 2026, overall air quality in Jena is fair. AQI is the main air quality indicator at 24.7/100. Pollution peaks around 5:00 PM (O3: 24.7/100).
Will air quality be worse tomorrow in Jena?
On 19 August 2026, air quality conditions in Jena will be similar to today, with PM1 forecast at fair at 33.8/100. Pollution peaks around 11:00 PM (NO2: 45.0/100).
When is air pollution at its worst in Jena?
People in Jena tend to notice reduced air quality when ash, oak, and beech pollen peaks, or on calm, hot days when local sources build up; regional road traffic is a modest local source. Ragweed levels rise modestly here from mid-August under the region's continental climate. Rain and wind both tend to clear the air fairly quickly here.
Are air quality levels in Jena 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.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 18 August 2026 at 20:27 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.
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.
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