Air Quality in Caledon, Canada
Drizzle
26.0°C · 58.5% humidity
26.0°
Feels 26.0°
71
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Calibrated model
Nearby Monitoring Stations
Caledon's air quality — share it
AQI Forecast
Calibrated
12
10am
12
10
71
1pm
54
40
32
4pm
28
23
20
7pm
16
14
13
10pm
12
14
13
1am
13
11
10
4am
10
10
10
7am
10
9
Station readings
18h ago
AQI 72
PM2.5 22.1 µg/m³ · 18h ago
CAMS model
adj -15
27
27
25
27
27
25
25
27
27
27
25
25
25
25
27
27
27
25
25
25
25
25
25
24
Air Quality Index Trend
7h · 1 stnCaledon'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 Caledon is 1.4× the WHO 24-hour guideline of 15 µg/m³.
58.5%
Humidity
33.3 km/h
Wind E
1014.9 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
21.54 µg/m³
PM10
84.3 µg/m³
050100150200300500
What is the weather forecast for Caledon?
Temperature & Precipitation
PM2.5 Trend
7h · 1 stationPM2.521.54 µg/m³
×1.4 WHO
Moderate
PM1084.3 µg/m³
Moderate
UV INDEX12.9
Extreme
What is the 7-day forecast for Caledon?
07-21
26.0° 21.1°
10.25 mm
07-22
23.4° 16.9°
1.94 mm
07-23
18.9° 15.0°
0.44 mm
07-24
21.8° 14.3°
07-25
22.4° 13.0°
0.69 mm
07-26
24.8° 18.4°
3.62 mm
07-27
27.1° 18.0°
0.13 mm
Both models agree
Avg diff: 3.1°C
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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 2026-07-21T17:17 UTC.