Air Quality in Ancaster, Canada

Windy
24.2°C · 65.6% humidity
24.2°
Feels 24.2°
147
Unhealthy for sensitive groups
Sensitive groups should reduce prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast Calibrated
20 10am
27
27
147 1pm
113
89
71 4pm
79
70
43 7pm
32
26
24 10pm
22
21
22 1am
20
19
19 4am
19
18
20 7am
20
17
Station readings 18h ago
AQI 95
PM2.5 33.2 µg/m³ · 18h ago
CAMS model adj -7
27
34
34
34
34
34
34
54
54
34
27
25
25
25
25
27
25
25
25
25
25
27
27
24
AD 728×90

Air Quality Index Trend

8h · 5 stn

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. Current PM2.5 concentration in Ancaster is 3.6× the WHO 24-hour guideline of 15 µg/m³.

65.6%
Humidity
48.4 km/h
Wind ENE
1014.8 hPa
Pressure
17.4
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
147
54.08 µg/m³
PM10
78
109.3 µg/m³
050100150200300500

What is the weather forecast for Ancaster?

Temperature & Precipitation

PM2.5 Trend

8h · 5 stations
PM2.554.08 µg/m³ ×3.6 WHO
Unhealthy for sensitive groups
PM10109.3 µg/m³
Moderate
UV INDEX17.4
Extreme
AD 300×250

What is the 7-day forecast for Ancaster?

07-21
26.0° 19.8°
0.88 mm
07-22
24.1° 18.7°
07-23
22.4° 15.4°
07-24
25.3° 14.6°
07-25
24.8° 14.8°
1.94 mm
07-26
28.6° 17.9°
2.56 mm
07-27
29.7° 19.9°
0.19 mm
Both models agree Avg diff: 2.9°C

Where are air quality stations near Ancaster?

6
Hamilton West, Ontario, Canada
7.8 km PM2.5: 1.4 µg/m³
13
Hamilton West, Ontario, Canada
7.8 km PM2.5: 3.1 µg/m³
10
Hamilton Mountain, Ontario, Canada
10.2 km PM2.5: 2.4 µg/m³
26
Hamilton Mountain, Ontario, Canada
10.2 km PM2.5: 6.2 µg/m³
38
Hamilton Downtown, Ontario, Canada
11.1 km PM2.5: 9.1 µg/m³
10
Hamilton Downtown, Ontario, Canada
11.1 km PM2.5: 2.4 µg/m³
24
Hamilton Downtown, Ontario, Canada
11.1 km PM2.5: 5.8 µg/m³
31
Burlington, Ontario, Canada
18.4 km PM2.5: 7.4 µg/m³
52
Burlington, Ontario, Canada
18.4 km PM2.5: 12.6 µg/m³
33
Brantford, Ontario, Canada
26.3 km PM2.5: 7.9 µg/m³

What cities are near Ancaster?

116 Hamilton 147 Waterdown 116 Stoney Creek 147 Burlington 145 Brantford 114 Christopher-Champlain 114 Cambridge 145 Brant 145 Fiddlesticks 116 Grimsby
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:17 UTC.