Air Quality in Thorold, Canada
Windy
21.6°C · 83.5% humidity
21.6°
Feels 21.6°
116
Unhealthy for sensitive groups
Sensitive groups should reduce prolonged outdoor exertion.
Model forecast
Nearby Monitoring Stations
Thorold's air quality — share it
AQI Forecast
Calibrated
24
10am
24
24
116
1pm
110
91
78
4pm
68
61
36
7pm
33
21
20
10pm
18
17
19
1am
18
18
16
4am
15
15
15
7am
17
14
Station readings
18h ago
AQI 82
PM2.5 26.8 µg/m³ · 18h ago
CAMS model
adj -10
34
34
34
34
54
54
54
54
54
34
34
25
25
25
25
27
27
27
25
25
25
25
27
24
Air Quality Index Trend
8h · 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. Current PM2.5 concentration in Thorold is 2.8× the WHO 24-hour guideline of 15 µg/m³.
83.5%
Humidity
79.4 km/h
Wind NE
1014.7 hPa
Pressure
14.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
41.58 µg/m³
PM10
84.3 µg/m³
050100150200300500
What is the weather forecast for Thorold?
Temperature & Precipitation
PM2.5 Trend
8h · 1 stationPM2.541.58 µg/m³
×2.8 WHO
Unhealthy for sensitive groups
PM1084.3 µg/m³
Moderate
UV INDEX14.9
Extreme
What is the 7-day forecast for Thorold?
07-21
25.7° 21.3°
0.06 mm
07-22
23.7° 20.4°
0.19 mm
07-23
21.0° 17.7°
0.25 mm
07-24
24.6° 19.1°
07-25
21.9° 17.7°
3.56 mm
07-26
23.8° 20.7°
7.06 mm
07-27
25.5° 21.1°
0.75 mm
Both models agree
Avg diff: 3.0°C
Where are air quality stations near Thorold?
33
St. Catharines, Ontario, Canada
42
St. Catharines, Ontario, Canada
19
Tonawanda II, New York, USA
48
Tonawanda II, New York, USA
What cities are near Thorold?
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:17 UTC.