Air Quality in St. Catharines, Canada

Windy
10.4°C · 95.8% humidity
10.4°
Feels 10.4°
43
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
37 6pm
37
37
37 9pm
37
37
37 12am
37
37
37 3am
37
37
37 6am
25
25
37 9am
37
37
37 12pm
37
37
37 3pm
37
50
AD 728×90
95.8%
Humidity
88.0 km/h
Wind SW
1023.0 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for St. Catharines?

Temperature & Precipitation

PM2.510.42 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250

What is the 7-day forecast for St. Catharines?

04-09
11.7° 2.7°
04-10
12.2° 7.9°
04-11
8.3° 4.9°
7.13 mm
04-12
7.6° 5.0°
0.38 mm
04-13
15.3° 5.2°
5.63 mm
04-14
16.1° 11.9°
2.56 mm
04-15
12.3° 6.8°
18.25 mm
Both models agree Avg diff: 6.8°C

Where are air quality stations near St. Catharines?

47
St. Catharines, Ontario, Canada
1.4 km

What cities are near St. Catharines?

44 Thorold 42 Niagara-on-the-Lake 43 Niagara Falls 43 Niagara Falls 45 Welland 24 Grimsby 19 Grand Island 45 Port Colborne 19 North Tonawanda 20 Kenmore

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T21:14 UTC.