Air Quality in Thorold, Canada
Drizzle
18.1°C · 81.5% humidity
18.1°
Feels 18.1°
12
Good
Air quality is satisfactory. Enjoy outdoor activities.
2 stations
Nearby Monitoring Stations
Thorold's air quality — share it
AQI Forecast
Calibrated
19
5am
19
19
12
8am
14
16
17
11am
18
19
19
2pm
19
20
20
5pm
20
20
20
8pm
29
29
29
11pm
49
49
49
2am
49
49
Station readings
21
21
CAMS model
adj -5
24
24
24
24
24
25
25
25
25
25
25
25
25
25
25
25
34
34
34
54
54
54
54
54
Air Quality Index Trend
45h · 1 stnThorold's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.
81.5%
Humidity
87.8 km/h
Wind N
1012.5 hPa
Pressure
1.4
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5
2.75 µg/m³
PM10▲
13.7 µg/m³
050100150200300500
What is the weather forecast for Thorold?
Temperature & Precipitation
PM2.5 Trend
45h · 1 stationPM2.52.75 µg/m³
✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX1.4
Low
Station readings (2 stations within 25 km)
2.75
Median
2.75
Average
0.5
Low
5.0
High
PM2.5 µg/m³ · Model: 5.8 · Bias: +3.0
What is the 7-day forecast for Thorold?
09-05
23.5° 18.1°
1.06 mm
09-06
23.7° 18.2°
5.5 mm
09-07
21.5° 17.2°
0.19 mm
09-08
25.1° 17.2°
3.0 mm
09-09
22.0° 16.4°
8.5 mm
09-10
19.5° 17.0°
0.19 mm
09-11
22.2° 15.9°
0.62 mm
Both models agree
Avg diff: 3.7°C
Where are air quality stations near Thorold?
31
St. Catharines, Ontario, Canada
18
St. Catharines, Ontario, Canada
21
St. Catharines, Ontario, Canada
15
Tonawanda II, New York, USA
22
Tonawanda II, New York, USA
What cities are near Thorold?
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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 2026-09-05T12:10 UTC.