What is the air quality in Alliston today?

The current Air Quality Index (AQI) in Alliston is 15 (Good). PM2.5 concentration is 3.68 µg/m³.

What is the temperature in Alliston right now?

The current temperature in Alliston is 6.5°C (feels like 2.3°C). Humidity is 79.5% and wind speed is 26.0 km/h.

Is it safe to go outside in Alliston?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 0.7 (Low).

Air Quality in Alliston, Canada

Cloudy

6.5°C · 79.5% humidity

6.5°

Feels 2.3°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

25 10pm

15 1am

20 4am

23 7am

24 10am

24 1pm

24 4pm

24 7pm

Air Quality Index Trend

48h · 6 stn

View full history →

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

79.5%

Humidity

26.0 km/h

Wind NNW

1023.5 hPa

Pressure

0.7

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

3.68 µg/m³

PM10

13.7 µg/m³

050100150200300500

What is the weather forecast for Alliston?

Temperature & Precipitation

PM2.5 Trend

48h · 6 stations

PM2.53.68 µg/m³ ✓ WHO

Good

PM1013.7 µg/m³

Good

UV INDEX0.7

Low

Station readings (1 station within 25 km)

3.68

Median

3.68

Average

3.68

Low

3.68

High

PM2.5 µg/m³ · Model: 5.9 · Bias: +2.2

What is the 7-day forecast for Alliston?

05-30

18.3° 6.5°

0.06 mm

05-31

25.2° 6.6°

06-01

28.5° 13.6°

06-02

19.1° 10.5°

0.56 mm

06-03

22.7° 19.0°

0.06 mm

06-04

18.5° 10.3°

06-05

21.5° 7.6°

0.62 mm

Both models agree Avg diff: 5.3°C

Where are air quality stations near Alliston?

NASA GSFC Rutgers Calib. N15

11.3 km PM2.5: 3.7 µg/m³

What cities are near Alliston?

27 Innisfil 31 Bolton 34 Orangeville 29 Barrie 34 Caledon 34 Keswick 41 Newmarket 41 East Gwillimbury 40 Aurora 32 Wasaga Beach

Get AQI alerts for Alliston

Notify me when air quality reaches:

ModerateAQI > 50 Unhealthy for Sensitive GroupsAQI > 100 UnhealthyAQI > 150 Very UnhealthyAQI > 200

Free · No account · Unsubscribe any time

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-30T05:05 UTC.