Worst air pollution St. Boniface Cathedral - Winnipeg, today and tomorrow
Today (16 July): Air quality in St. Boniface Cathedral is fair. AQI and O3 are fair; PM2.5, PM10, NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 12:00 PM (O3: 25.9/100).
Tomorrow (17 July 2026): Air quality in St. Boniface Cathedral is fair. All pollutants stay as today. Pollution peaks around 11:00 AM (O3: 22.9/100). Airmine updates local air quality forecasts four times daily.
For long term forecasts and maps, see the Airmine app
Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
Use our Strava plugin to check your own exposure.
St. Boniface Cathedral's air quality benefits from its Red River riverside setting, with Avenue de la Cathedrale traffic the modest local source.
Today - 16 July | Pollution peaks at 12:00
AQI:
Fair
25.9/100
PM2.5 (fine particles):
Good
11.8/100
PM10 (coarse particles):
Good
4.5/100
NO2 (nitrogen dioxide):
Good
7.2/100
O3 (ozone):
Fair
25.9/100
SO2 (sulfur dioxide):
Good
0.6/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.3/100
PM1 (ultrafine particles):
Good
7.9/100
Levels show the poorest local air quality during the day
Tomorrow - 17 July | Pollution peaks at 11:00
AQI:
Fair
22.9/100
PM2.5 (fine particles):
Good
14.2/100
PM10 (coarse particles):
Good
5.2/100
NO2 (nitrogen dioxide):
Good
6.8/100
O3 (ozone):
Fair
22.9/100
SO2 (sulfur dioxide):
Good
0.9/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.6/100
PM1 (ultrafine particles):
Good
11.0/100
Other Landmarks in Winnipeg
Sports venues in Winnipeg
Frequently Asked Questions
Is air quality bad in St. Boniface Cathedral right now?
On 16 July 2026, overall air quality in St. Boniface Cathedral is fair. AQI is the main air quality indicator at 25.9/100. Pollution peaks around 12:00 PM (O3: 25.9/100).
Will air quality be worse tomorrow in St. Boniface Cathedral?
On 17 July 2026, air quality conditions in St. Boniface Cathedral will be similar to today, with AQI forecast at fair at 22.9/100. Pollution peaks around 11:00 AM (O3: 22.9/100).
When is air pollution at its worst in St. Boniface Cathedral?
Seasonal air quality in St. Boniface Cathedral is closely linked to its riverside setting in the historic French quarter. Muggy summer afternoons occasionally let emissions build up when the air turns still, while deep winter cold adds a layer of heating smoke on the coldest evenings. A blustery prairie wind system typically sweeps any buildup away within a day or so.
Are air quality levels in St. Boniface Cathedral 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.
Check air quality in other popular cities:
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