Air Quality in Newmarket, Canada
Clear
27.6°C · 48.6% humidity
27.6°
Feels 29.5°
114
Unhealthy for sensitive groups
Sensitive groups should reduce prolonged outdoor exertion.
Model forecast
Nearby Monitoring Stations
Newmarket's air quality — share it
AQI Forecast
Calibrated
14
10am
14
7
114
1pm
84
62
46
4pm
42
34
28
7pm
17
12
10
10pm
11
10
16
1am
8
8
6
4am
6
5
7
7am
7
4
Station readings
18h ago
AQI 74
PM2.5 23.0 µg/m³ · 18h ago
CAMS model
adj -20
34
34
27
27
27
27
27
34
34
34
27
25
25
27
27
34
27
27
25
25
25
27
27
24
Air Quality Index Trend
8h · 1 stnNewmarket'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 Newmarket is 2.7× the WHO 24-hour guideline of 15 µg/m³.
48.6%
Humidity
31.0 km/h
Wind ESE
1014.5 hPa
Pressure
12.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
40.72 µg/m³
PM10
84.3 µg/m³
050100150200300500
What is the weather forecast for Newmarket?
Temperature & Precipitation
PM2.5 Trend
8h · 1 stationPM2.540.72 µg/m³
×2.7 WHO
Unhealthy for sensitive groups
PM1084.3 µg/m³
Moderate
UV INDEX12.9
Extreme
What is the 7-day forecast for Newmarket?
07-21
27.6° 20.0°
7.94 mm
07-22
23.9° 17.3°
0.56 mm
07-23
19.2° 14.3°
07-24
21.6° 16.7°
07-25
24.6° 13.3°
0.44 mm
07-26
26.5° 19.0°
0.81 mm
07-27
28.2° 19.2°
0.06 mm
Both models agree
Avg diff: 2.9°C
Where are air quality stations near Newmarket?
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:20 UTC.