Air Quality in Bolton, Canada

Partly Cloudy
27.2°C · 53.7% humidity
27.2°
Feels 29.6°
57
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station

Nearby Monitoring Stations

AQI Forecast Calibrated
16 10am
16
9
57 1pm
43
34
27 4pm
29
25
22 7pm
14
10
9 10pm
11
10
17 1am
10
9
7 4am
7
7
9 7am
9
6
Station readings 18h ago
AQI 69
PM2.5 20.7 µg/m³ · 18h ago
CAMS model adj -18
34
34
27
27
27
27
27
34
34
34
27
25
25
27
27
34
27
27
25
25
25
27
27
24
AD 728×90

Air Quality Index Trend

8h · 3 stn

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

53.7%
Humidity
30.4 km/h
Wind ESE
1014.6 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5
57
15.0 µg/m³
PM10▲
65
84.3 µg/m³
050100150200300500

What is the weather forecast for Bolton?

Temperature & Precipitation

PM2.5 Trend

8h · 3 stations
PM2.515.0 µg/m³ ✓ WHO
Moderate
PM1084.3 µg/m³
Moderate
UV INDEX12.9
Extreme
AD 300×250
Station readings (1 station within 25 km)
15.0
Median
15.0
Average
15.0
Low
15.0
High
PM2.5 µg/m³ · Model: 40.72 · Bias: +25.7

What is the 7-day forecast for Bolton?

07-21
27.2° 20.9°
11.06 mm
07-22
24.0° 16.9°
0.31 mm
07-23
20.1° 14.7°
0.06 mm
07-24
21.4° 16.3°
07-25
23.5° 13.1°
0.5 mm
07-26
25.8° 19.1°
2.12 mm
07-27
28.0° 19.0°
0.06 mm
Both models agree Avg diff: 2.8°C

Where are air quality stations near Bolton?

29
Brampton, Ontario, Canada
20.4 km PM2.5: 7.0 µg/m³
30
Brampton, Ontario, Canada
20.4 km PM2.5: 7.2 µg/m³
57
NASA GSFC Rutgers Calib. N20
23.7 km PM2.5: 15.0 µg/m³
15
Toronto West, Ontario, Canada
24.5 km PM2.5: 3.6 µg/m³
17
Newmarket, Ontario, Canada
27.4 km PM2.5: 4.1 µg/m³
31
Newmarket, Ontario, Canada
27.4 km PM2.5: 7.4 µg/m³

What cities are near Bolton?

65 Mount Olive-Silverstone-Jamestown 60 Vaughan 71 Caledon 65 Humbermede 70 West Humber-Clairville 60 Black Creek 93 Brampton 62 Glenfield-Jane Heights 59 York University Heights 65 Richmond Hill
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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 2026-07-21T17:18 UTC.