Air Quality in Thorold, Canada

Clear
19.3°C · 46.4% humidity
19.3°
Feels 19.3°
35
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
22 2am
22
22
35 5am
31
28
26 8am
23
22
22 11am
21
23
21 2pm
21
20
20 5pm
20
20
20 8pm
20
20
20 11pm
20
20
Station readings
30
30
30
CAMS model adj -5
27
27
27
25
25
25
25
24
24
25
25
27
25
25
25
25
25
25
25
25
25
25
25
25
AD 728×90

Air Quality Index Trend

31h · 1 stn

Thorold's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

46.4%
Humidity
12.8 km/h
Wind E
1014.9 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
35
8.3 µg/m³
PM10
25
27.4 µg/m³
050100150200300500

What is the weather forecast for Thorold?

Temperature & Precipitation

PM2.5 Trend

31h · 1 station
PM2.58.3 µg/m³ ✓ WHO
Good
PM1027.4 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (2 stations within 25 km)
8.3
Median
8.3
Average
8.2
Low
8.4
High
PM2.5 µg/m³ · Model: 13.5 · Bias: +5.2

What is the 7-day forecast for Thorold?

08-03
24.3° 19.3°
3.38 mm
08-04
28.9° 20.3°
5.5 mm
08-05
27.4° 16.6°
0.31 mm
08-06
23.5° 19.7°
9.06 mm
08-07
25.6° 18.5°
0.56 mm
08-08
29.0° 20.0°
08-09
30.4° 20.0°
0.13 mm
Both models agree Avg diff: 2.5°C

Where are air quality stations near Thorold?

30
St. Catharines, Ontario, Canada
5.6 km PM2.5: 7.2 µg/m³
34
St. Catharines, Ontario, Canada
5.6 km PM2.5: 8.2 µg/m³
39
St. Catharines, Ontario, Canada
5.6 km PM2.5: 9.4 µg/m³
30
St. Catharines, Ontario, Canada
5.6 km PM2.5: 7.2 µg/m³
30
St. Catharines, Ontario, Canada
5.6 km PM2.5: 7.2 µg/m³
39
Tonawanda II, New York, USA
27.7 km PM2.5: 9.4 µg/m³
29
Tonawanda II, New York, USA
27.7 km PM2.5: 7.0 µg/m³

What cities are near Thorold?

35 St. Catharines 35 Niagara Falls 35 Niagara Falls 35 Welland 35 Niagara-on-the-Lake 54 Grand Island 31 Port Colborne 45 North Tonawanda 38 Grimsby 31 Kenmore
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-08-08T09:09 UTC.