Air Quality in Markham, Canada

Windy
21.3°C · 36.9% humidity
21.3°
Feels 21.3°
49
Good
Air quality is satisfactory. Enjoy outdoor activities.
7 stations

Nearby Monitoring Stations

AQI Forecast Calibrated
57 4pm
57
64
49 7pm
73
76
78 10pm
80
93
94 1am
112
112
112 4am
112
114
96 7am
84
55
55 10am
55
57
57 1pm
57
57
Station readings
64
55
74
42
CAMS model adj +30
27
27
34
34
54
54
54
54
66
66
83
83
83
83
84
66
54
25
25
25
27
27
27
27
AD 728×90

Air Quality Index Trend

48h · 5 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.

36.9%
Humidity
75.0 km/h
Wind NW
1013.9 hPa
Pressure
2.9
UV Moderate
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
49
11.84 µg/m³
PM10
31
34.3 µg/m³
050100150200300500

What is the weather forecast for Markham?

Temperature & Precipitation

PM2.5 Trend

48h · 5 stations
PM2.511.84 µg/m³ ✓ WHO
Good
PM1034.3 µg/m³
Good
UV INDEX2.9
Moderate
AD 300×250
Station readings (7 stations within 25 km)
11.84
Median
12.62
Average
10.1
Low
17.06
High
PM2.5 µg/m³ · Model: 17.65 · Bias: +5.8

What is the 7-day forecast for Markham?

08-03
23.4° 17.3°
4.81 mm
08-04
27.3° 17.5°
0.25 mm
08-05
33.3° 13.9°
0.06 mm
08-06
27.8° 18.1°
6.81 mm
08-07
28.4° 13.7°
3.38 mm
08-08
34.0° 17.1°
0.06 mm
08-09
37.0° 19.4°
1.69 mm
Both models agree Avg diff: 3.7°C

Where are air quality stations near Markham?

42
Toronto East, Ontario, Canada
13.2 km PM2.5: 10.1 µg/m³
50
Toronto East, Ontario, Canada
13.2 km PM2.5: 12.0 µg/m³
55
Toronto East, Ontario, Canada
13.2 km PM2.5: 14.0 µg/m³
55
Toronto East, Ontario, Canada
13.2 km PM2.5: 14.0 µg/m³
39
Toronto East, Ontario, Canada
13.2 km PM2.5: 9.4 µg/m³
55
Toronto East, Ontario, Canada
13.2 km PM2.5: 14.0 µg/m³
57
Toronto North, Ontario, Canada
15.4 km PM2.5: 15.0 µg/m³
53
Toronto North, Ontario, Canada
15.4 km PM2.5: 13.1 µg/m³
37
Toronto North, Ontario, Canada
15.4 km PM2.5: 8.9 µg/m³
39
Toronto North, Ontario, Canada
15.4 km PM2.5: 9.4 µg/m³

What cities are near Markham?

48 Milliken 48 Agincourt North 49 Malvern 48 Steeles 48 Agincourt South-Malvern West 48 L'Amoreaux 47 Hillcrest Village 48 Tam O'Shanter-Sullivan 50 Morningside 48 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 2026-08-07T23:45 UTC.