Air Quality in Thorold, Canada

Windy
10.3°C · 68.3% humidity
10.3°
Feels 10.3°
32
Good
Air quality is satisfactory. Enjoy outdoor activities.
3 stations

Nearby Monitoring Stations

AQI Forecast
27 5pm
27
25
32 8pm
38
57
36 11pm
28
26
26 2am
25
25
25 5am
25
25
25 8am
25
27
27 11am
34
54
54 2pm
54
54
AD 728×90

Air Quality Index Trend

48h · 4 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. Current PM2.5 concentration in Thorold is 1.6× the WHO annual guideline of 5 µg/m³.

68.3%
Humidity
55.4 km/h
Wind NW
1024.7 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
32
7.77 µg/m³
PM10
19
20.55 µg/m³
050100150200300500

What is the weather forecast for Thorold?

Temperature & Precipitation

PM2.5 Trend

48h · 4 stations
PM2.57.77 µg/m³ ✓ WHO
Good
PM1020.55 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (3 stations within 25 km)
7.77
Median
7.77
Average
7.7
Low
7.9
High
PM2.5 µg/m³ · Model: 10.0 · Bias: +2.2

What is the 7-day forecast for Thorold?

05-29
19.4° 8.1°
1.0 mm
05-30
14.4° 11.0°
0.13 mm
05-31
20.4° 10.6°
06-01
18.2° 11.5°
06-02
16.5° 11.9°
0.25 mm
06-03
18.6° 14.6°
0.13 mm
06-04
18.7° 12.3°
0.13 mm
Both models agree Avg diff: 3.9°C

Where are air quality stations near Thorold?

8
St. Catharines, Ontario, Canada
5.6 km PM2.5: 1.9 µg/m³
25
St. Catharines, Ontario, Canada
5.6 km PM2.5: 6.0 µg/m³
58
Tonawanda II, New York, USA
27.7 km PM2.5: 15.4 µg/m³
1
Tonawanda II, New York, USA
27.7 km PM2.5: 0.2 µg/m³

What cities are near Thorold?

32 St. Catharines 32 Niagara Falls 32 Niagara Falls 32 Welland 32 Niagara-on-the-Lake 25 Grand Island 22 Port Colborne 25 North Tonawanda 31 Grimsby 25 Kenmore
Get AQI alerts for Thorold

Notify me when air quality reaches:

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T00:11 UTC.