Air Quality in Markham, Canada

Windy
14.2°C · 89.0% humidity
14.2°
Feels 14.2°
20
Good
Air quality is satisfactory. Enjoy outdoor activities.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
40 12pm
38
60
43 3pm
43
43
43 6pm
43
43
56 9pm
56
56
56 12am
56
56
56 3am
56
56
56 6am
56
56
56 9am
56
56
Station readings
40
38
60
CAMS model adj +6
37
37
37
37
37
37
37
37
37
50
50
50
50
50
50
50
50
50
50
50
50
50
50
50
AD 728×90

PM2.5 Trend (24h)

26h · 1 station
89.0%
Humidity
122.4 km/h
Wind SW
1021.3 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for Markham?

Temperature & Precipitation

PM2.54.66 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250
Station readings (1 station within 25 km)
4.66
Median
4.66
Average
4.66
Low
4.66
High
PM2.5 µg/m³ · Model: 11.9 · Bias: +7.2

What is the 7-day forecast for Markham?

04-09
14.2° -0.2°
04-10
16.5° 8.9°
04-11
9.9° 3.5°
10.06 mm
04-12
7.1° 2.7°
04-13
20.6° 5.3°
9.69 mm
04-14
19.9° 14.6°
5.75 mm
04-15
16.4° 4.3°
8.44 mm
Both models agree Avg diff: 3.4°C

Where are air quality stations near Markham?

42
Toronto East, Ontario, Canada
13.2 km
42
Toronto East, Ontario, Canada
13.2 km
59
Toronto North, Ontario, Canada
15.4 km
50
Toronto North, Ontario, Canada
15.4 km
20
NASA GSFC Rutgers Calib. N20
18.4 km PM2.5: 4.9 µg/m³
46
Toronto Downtown, Ontario, Canada
24.7 km
42
Toronto Downtown, Ontario, Canada
24.7 km
38
Toronto Downtown, Ontario, Canada
24.7 km
50
Toronto Downtown, Ontario, Canada
24.7 km
–
canada-toronto-richmond-street-west
26.0 km 28.0°C 20.0% RH PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

What cities are near Markham?

20 Milliken 20 Agincourt North 20 Malvern 20 Steeles 20 Agincourt South-Malvern West 20 L'Amoreaux 20 Hillcrest Village 20 Tam O'Shanter-Sullivan 20 Morningside 20 Pleasant View

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T15:09 UTC.