What is the air quality in Markham today?

The current Air Quality Index (AQI) in Markham is 18 (Good). PM2.5 concentration is 4.17 µg/m³.

What is the temperature in Markham right now?

The current temperature in Markham is 14.5°C (feels like 14.5°C). Humidity is 91.4% and wind speed is 55.9 km/h.

Is it safe to go outside in Markham?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 1.4 (Low).

Air Quality in Markham, Canada

Windy

14.5°C · 91.4% humidity

14.5°

Feels 14.5°

Good

Air quality is satisfactory. Enjoy outdoor activities.

6 stations

Nearby Monitoring Stations

AQI Forecast Calibrated

10 5am

18 8am

14 11am

11 2pm

10 5pm

10 8pm

10 11pm

10 2am

Station readings

CAMS model adj -14

Air Quality Index Trend

47h · 3 stn

View full history →

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.

91.4%

Humidity

55.9 km/h

Wind N

1013.1 hPa

Pressure

1.4

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

4.17 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Markham?

Temperature & Precipitation

PM2.5 Trend

47h · 3 stations

PM2.54.17 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX1.4

Low

Station readings (6 stations within 25 km)

4.17

Median

4.09

Average

0.86

Low

7.2

High

PM2.5 µg/m³ · Model: 5.9 · Bias: +1.7

Both models agree Avg diff: 4.1°C

Where are air quality stations near Markham?

Toronto East, Ontario, Canada

13.2 km PM2.5: 5.0 µg/m³

Toronto East, Ontario, Canada

13.2 km PM2.5: 4.1 µg/m³

Toronto North, Ontario, Canada

15.4 km PM2.5: 5.0 µg/m³

Toronto North, Ontario, Canada

15.4 km PM2.5: 4.8 µg/m³

NASA GSFC Rutgers Calib. N20

18.4 km PM2.5: 4.7 µg/m³

Wood Glen

20.4 km PM2.5: 0.9 µg/m³ PM10: 1.4 µg/m³

Toronto Downtown, Ontario, Canada

24.7 km PM2.5: 8.2 µg/m³

Toronto

25.5 km PM2.5: 5.0 µg/m³

Toronto

25.5 km PM2.5: 6.0 µg/m³

–

canada-toronto-richmond-street-west

26.0 km 26.2°C 48.7% RH PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

What cities are near Markham?

18 Milliken 16 Agincourt North 16 Malvern 19 Steeles 15 Agincourt South-Malvern West 17 L'Amoreaux 20 Hillcrest Village 15 Tam O'Shanter-Sullivan 15 Morningside 18 Pleasant View

Get AQI alerts for Markham

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-09-05T12:10 UTC.