Worst air pollution Rapperswil-Jona, today and tomorrow

On 30 August 2026, overall air quality in Rapperswil-Jona is fair. AQI is the main air quality indicator at 28.7/100. Pollution peaks around 2:00 AM (NO2: 28.7/100).

On 31 August 2026, air quality conditions in Rapperswil-Jona will be similar to today, with AQI forecast at fair at 31.8/100. Pollution peaks around 1:00 AM (NO2: 31.8/100).

Rapperswil-Jona's poorest air quality tends to show up when winter stillness lets vehicle traffic and light industry build up in the surrounding valley rather than dispersing. Things generally improve from spring onward, as stronger winds move through more easily, save for an occasional hot-weather ozone peak; autumn stays mostly calm and clear.

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.

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.