http://londonair.org.uk/forecast Air pollution forecasts for London from Imperial College London hourly 1 This forecast is intended to provide information on expected pollution levels in areas of significant public exposure. It may not apply in very specific locations close to unusually strong or short-lived local sources of pollution. http://londonair.org.uk/forecast London is expecting a spell of hot, sunny weather with light winds, pushing late afternoon temperatures into the upper 20s or low 30s °C. This heat is being driven by a high pressure system and a southernly airflow traveling north over Spain and France.<br/><br/>The combination of strong sunshine, local emissions, and imported continental pollution will likely trigger "Moderate" levels of ground-level ozone and particulate pollution in the afternoons. <br/><br/>Air pollution is forecast to remain 'Low' for the following pollutants:<br/><br/>Nitrogen Dioxide<br/>Sulphur Dioxide Fri, 22 May 2026 10:47:06 GMT http://londonair.org.uk/forecast/53539 http://londonair.org.uk/forecast London is expecting a spell of hot, sunny weather with light winds, pushing late afternoon temperatures into the upper 20s or low 30s °C. This heat is being driven by a high pressure system and a southernly airflow traveling north over Spain and France.<br/><br/>The combination of strong sunshine, local emissions, and imported continental pollution will likely trigger "Moderate" levels of ground-level ozone and particulate pollution in the afternoons. <br/><br/>Air pollution is forecast to remain 'Low' for the following pollutants:<br/><br/>Nitrogen Dioxide<br/>Sulphur Dioxide Fri, 22 May 2026 10:47:06 GMT http://londonair.org.uk/forecast/53539