Air Quality in Markham, Canada

Windy
12.4°C · 68.9% humidity
12.4°
Feels 12.4°
35
Good
Air quality is satisfactory. Enjoy outdoor activities.
10 stations

Nearby Monitoring Stations

AQI Forecast
27 8pm
27
27
35 11pm
33
29
28 2am
26
26
25 5am
25
25
24 8am
24
24
24 11am
24
24
24 2pm
24
24
24 5pm
25
25
AD 728×90

Air Quality Index Trend

48h · 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.

68.9%
Humidity
83.3 km/h
Wind NW
1017.2 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
35
8.34 µg/m³
PM10
13
13.7 µg/m³
050100150200300500

What is the weather forecast for Markham?

Temperature & Precipitation

PM2.5 Trend

48h · 11 stations
PM2.58.34 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (10 stations within 25 km)
8.34
Median
9.6
Average
5.76
Low
17.8
High
PM2.5 µg/m³ · Model: 6.25 · Bias: -2.1

What is the 7-day forecast for Markham?

05-30
17.6° 6.9°
0.06 mm
05-31
25.4° 6.3°
06-01
28.7° 14.3°
06-02
19.9° 8.3°
0.25 mm
06-03
22.9° 18.3°
0.06 mm
06-04
21.2° 10.7°
06-05
21.5° 8.2°
0.31 mm
Both models agree Avg diff: 5.5°C

Where are air quality stations near Markham?

17
Toronto East, Ontario, Canada
13.2 km PM2.5: 4.1 µg/m³
26
Toronto East, Ontario, Canada
13.2 km PM2.5: 6.2 µg/m³
18
Toronto East, Ontario, Canada
13.2 km PM2.5: 4.3 µg/m³
13
Toronto North, Ontario, Canada
15.4 km PM2.5: 3.1 µg/m³
16
Toronto North, Ontario, Canada
15.4 km PM2.5: 3.8 µg/m³
24
NASA GSFC Rutgers Calib. N20
18.4 km PM2.5: 5.8 µg/m³
175
Toronto Downtown, Ontario, Canada
24.7 km PM2.5: 102.0 µg/m³
53
Toronto
25.5 km PM2.5: 13.1 µg/m³
59
Toronto
25.5 km PM2.5: 15.9 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?

34 Milliken 33 Agincourt North 33 Malvern 34 Steeles 32 Agincourt South-Malvern West 33 L'Amoreaux 34 Hillcrest Village 32 Tam O'Shanter-Sullivan 33 Morningside 34 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 2026-05-30T03:01 UTC.