Worst air pollution Cirencester, today and tomorrow
Today (16 July): Air quality in Cirencester is fair. AQI, NO2, and O3 are fair; PM2.5, PM10, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 3:00 PM (O3: 34.0/100).
Tomorrow (17 July 2026): Air quality in Cirencester is fair. AQI improves to medium; O3 decreases to medium; all other pollutants stay as today. Pollution peaks around 4:00 PM (O3: 43.6/100). 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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Rush-hour queues near the M5 are usually when readings climb the most. Cirencester's air quality reflects its position within Gloucestershire, with local traffic and the town's built-up core as the main contributors. Residential heating and light industry add a modest seasonal contribution, though the region's typical south-westerlies keep overall levels moderate.
Today - 16 July | Pollution peaks at 15:00
AQI:
Fair
34.0/100
PM2.5 (fine particles):
Good
11.0/100
PM10 (coarse particles):
Good
3.7/100
NO2 (nitrogen dioxide):
Fair
23.7/100
O3 (ozone):
Fair
34.0/100
SO2 (sulfur dioxide):
Good
3.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
3.8/100
PM1 (ultrafine particles):
Good
10.5/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 16:00
AQI:
Medium
43.6/100
PM2.5 (fine particles):
Good
15.1/100
PM10 (coarse particles):
Good
5.1/100
NO2 (nitrogen dioxide):
Fair
31.2/100
O3 (ozone):
Medium
43.6/100
SO2 (sulfur dioxide):
Good
4.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
5.2/100
PM1 (ultrafine particles):
Good
14.1/100
Pollen forecast in Cirencester
View pollen forecastFrequently Asked Questions
Is air quality bad in Cirencester right now?
On 16 July 2026, overall air quality in Cirencester is fair. AQI is the main air quality indicator at 34.0/100. Pollution peaks around 3:00 PM (O3: 34.0/100).
Will air quality be worse tomorrow in Cirencester?
On 17 July 2026, air quality conditions in Cirencester will be similar to today, with NO2 forecast at fair at 31.2/100. Pollution peaks around 4:00 PM (O3: 43.6/100).
When is air pollution at its worst in Cirencester?
If you're tracking air quality in Cirencester, expect it to move around quite a bit through the year. In summer, ozone can build up on sunny afternoons, though windier, warmer weather usually helps clear traffic-related pollution faster than in winter. In deep winter, a lack of wind lets M5 traffic fumes and woodsmoke settle instead of blowing through. The shoulder seasons generally bring the mildest readings of the year.
Are air quality levels in Cirencester 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