What is the air quality in Markham today?

The current Air Quality Index (AQI) in Markham is 20 (Good). PM2.5 concentration is 4.85 µg/m³.

What is the temperature in Markham right now?

The current temperature in Markham is 3.5°C (feels like -2.2°C). Humidity is 63.5% and wind speed is 34.2 km/h.

Is it safe to go outside in Markham?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.0 (Low).

Air Quality in Markham, Canada

Partly Cloudy

3.5°C · 63.5% humidity

3.5°

Feels -2.2°

Good

Air quality is satisfactory. Enjoy outdoor activities.

5 stations

Nearby Monitoring Stations

AQI Forecast

23 3pm

20 6pm

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Station readings

Air Quality Index Trend

48h · 5 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.

63.5%

Humidity

34.2 km/h

Wind SSE

1029.1 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

4.85 µg/m³

PM10▲

27.4 µg/m³

050100150200300500

What is the weather forecast for Markham?

Temperature & Precipitation

PM2.5 Trend

48h · 5 stations

PM2.54.85 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (5 stations within 25 km)

4.85

Median

4.65

Average

3.8

Low

5.5

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +8.6

What is the 7-day forecast for Markham?

10-20

6.8° 3.3°

10-21

17.7° 3.5°

10-22

12.4° 5.4°

10-23

11.3° 1.0°

3.94 mm

10-24

14.2° 1.6°

0.81 mm

10-25

11.6° 3.2°

3.75 mm

10-26

7.9° 4.1°

11.5 mm

Both models agree Avg diff: 4.8°C

Where are air quality stations near Markham?

Toronto East, Ontario, Canada

13.2 km PM2.5: 5.3 µg/m³

Toronto East, Ontario, Canada

13.2 km PM2.5: 4.3 µg/m³

Toronto East, Ontario, Canada

13.2 km PM2.5: 5.3 µg/m³

Toronto East, Ontario, Canada

13.2 km PM2.5: 5.3 µg/m³

Toronto North, Ontario, Canada

15.4 km PM2.5: 5.3 µg/m³

Toronto North, Ontario, Canada

15.4 km PM2.5: 5.5 µg/m³

Toronto North, Ontario, Canada

15.4 km PM2.5: 4.8 µg/m³

Toronto North, Ontario, Canada

15.4 km PM2.5: 5.3 µg/m³

NASA GSFC Rutgers Calib. N20

18.4 km PM2.5: 4.1 µg/m³

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Wood Glen

20.4 km PM2.5: 0.0 µg/m³ PM10: 0.0 µg/m³

What cities are near Markham?

20 Milliken 21 Agincourt North 21 Malvern 20 Steeles 22 Agincourt South-Malvern West 21 L'Amoreaux 20 Hillcrest Village 22 Tam O'Shanter-Sullivan 21 Morningside 20 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 2026-10-20T22:41 UTC.