What is the air quality in Ancaster today?

The current Air Quality Index (AQI) in Ancaster is 21 (Good). PM2.5 concentration is 5.13 µg/m³.

What is the temperature in Ancaster right now?

The current temperature in Ancaster is 5.4°C (feels like -0.1°C). Humidity is 73.0% and wind speed is 38.8 km/h.

Is it safe to go outside in Ancaster?

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

Air Quality in Ancaster, Canada

Cloudy

5.4°C · 73.0% humidity

5.4°

Feels -0.1°

Good

Air quality is satisfactory. Enjoy outdoor activities.

8 stations

Nearby Monitoring Stations

AQI Forecast

22 2pm

21 5pm

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Station readings

Air Quality Index Trend

47h · 5 stn

View full history →

Ancaster's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration.

73.0%

Humidity

38.8 km/h

Wind E

1028.7 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

5.13 µg/m³

PM10▲

41.2 µg/m³

050100150200300500

What is the weather forecast for Ancaster?

Temperature & Precipitation

PM2.5 Trend

47h · 5 stations

PM2.55.13 µg/m³ ✓ WHO

Good

PM1041.2 µg/m³

Good

UV INDEX0.0

Low

Station readings (8 stations within 25 km)

5.13

Median

5.2

Average

4.6

Low

6.0

High

PM2.5 µg/m³ · Model: 19.2 · Bias: +14.1

What is the 7-day forecast for Ancaster?

10-20

7.1° 2.9°

10-21

20.7° 5.4°

10-22

16.9° 5.2°

10-23

13.6° 2.2°

1.06 mm

10-24

17.2° 4.4°

0.19 mm

10-25

13.6° 5.7°

0.88 mm

10-26

10.4° 6.1°

3.44 mm

Both models agree Avg diff: 4.1°C

Where are air quality stations near Ancaster?

Hamilton West, Ontario, Canada

7.8 km PM2.5: 5.5 µg/m³

Hamilton West, Ontario, Canada

7.8 km PM2.5: 5.3 µg/m³

Hamilton West, Ontario, Canada

7.8 km PM2.5: 5.3 µg/m³

Hamilton West, Ontario, Canada

7.8 km PM2.5: 5.3 µg/m³

Hamilton Mountain, Ontario, Canada

10.2 km PM2.5: 4.8 µg/m³

Hamilton Mountain, Ontario, Canada

10.2 km PM2.5: 4.8 µg/m³

Hamilton Mountain, Ontario, Canada

10.2 km PM2.5: 5.3 µg/m³

Hamilton Mountain, Ontario, Canada

10.2 km PM2.5: 8.4 µg/m³

Hamilton Mountain, Ontario, Canada

10.2 km PM2.5: 5.0 µg/m³

Hamilton Mountain, Ontario, Canada

10.2 km PM2.5: 4.3 µg/m³

What cities are near Ancaster?

20 Hamilton 22 Waterdown 21 Stoney Creek 23 Burlington 27 Brantford 25 Christopher-Champlain 25 Cambridge 27 Brant 24 Fiddlesticks 22 Grimsby

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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 2026-10-20T21:43 UTC.