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St. Catharines

Saint Catharines, Niagara Regional Municipality

2026-02-17 04:00
AQI (US)
Moderate
Pollutants
PM2.5
μg/m³
16
O3
μg/m³
77.1
NO2
μg/m³
6.2
Weather
  • ℃
  • ℉
4℃
91%
22 kph
0 of 11
Historical Data
  • Hourly
  • Daily
  • AQI (US)
  • PM2.5
  • O3
  • NO2
Data Sources
http://www.airnow.gov/

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