Air Quality in Markham, Canada

Drizzle
7.1°C · 96.2% humidity
7.1°
Feels 0.0°
27
Good
Air quality is satisfactory. Enjoy outdoor activities.
8 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
30 5pm
30
30
27 8pm
30
30
30 11pm
30
30
29 2am
29
29
30 5am
30
30
30 8am
30
32
39 11am
59
59
59 2pm
59
59
Station readings 26h ago
AQI 29
PM2.5 7.0 µg/m³ · 26h ago
AD 728×90

Air Quality Index Trend

49h · 11 stn

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

96.2%
Humidity
90.1 km/h
Wind NW
1000.3 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
27
6.54 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Markham?

Temperature & Precipitation

PM2.5 Trend

49h · 11 stations
PM2.56.54 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (8 stations within 25 km)
6.54
Median
7.1
Average
5.3
Low
9.8
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -0.3
Both models agree Avg diff: 6.7°C

Where are air quality stations near Markham?

69
Toronto East, Ontario, Canada
13.2 km PM2.5: 20.7 µg/m³
36
Toronto East, Ontario, Canada
13.2 km PM2.5: 8.6 µg/m³
17
Toronto East, Ontario, Canada
13.2 km PM2.5: 4.1 µg/m³
142
Toronto North, Ontario, Canada
15.4 km PM2.5: 52.2 µg/m³
3
Toronto North, Ontario, Canada
15.4 km PM2.5: 0.7 µg/m³
30
NASA GSFC Rutgers Calib. N20
18.4 km PM2.5: 7.1 µg/m³
4
Toronto Downtown, Ontario, Canada
24.7 km PM2.5: 1.0 µg/m³
17
Toronto
25.5 km PM2.5: 4.1 µg/m³
34
Toronto
25.5 km PM2.5: 8.2 µg/m³
–
canada-toronto-richmond-street-west
26.0 km 24.9°C 32.0% RH PM2.5: 0.1 µg/m³ PM10: 0.2 µg/m³

What cities are near Markham?

27 Milliken 25 Agincourt North 25 Malvern 28 Steeles 24 Agincourt South-Malvern West 26 L'Amoreaux 28 Hillcrest Village 24 Tam O'Shanter-Sullivan 25 Morningside 27 Pleasant View
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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 2026-06-09T00:27 UTC.