What is the air quality in Guelph today?

The current Air Quality Index (AQI) in Guelph is 22 (Good). PM2.5 concentration is 5.3 µg/m³.

What is the temperature in Guelph right now?

The current temperature in Guelph is 3.5°C (feels like -2.9°C). Humidity is 78.4% and wind speed is 42.3 km/h.

Is it safe to go outside in Guelph?

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

Air Quality in Guelph, Canada

Windy

3.5°C · 78.4% humidity

3.5°

Feels -2.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

2 stations

Nearby Monitoring Stations

AQI Forecast

26 5pm

22 8pm

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Station readings

Air Quality Index Trend

47h · 2 stn

View full history →

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

78.4%

Humidity

42.3 km/h

Wind ESE

1028.9 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

5.3 µg/m³

PM10▲

27.4 µg/m³

050100150200300500

What is the weather forecast for Guelph?

Temperature & Precipitation

PM2.5 Trend

47h · 2 stations

PM2.55.3 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (2 stations within 25 km)

5.3

Median

5.05

Average

4.8

Low

5.3

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +8.2

What is the 7-day forecast for Guelph?

10-21

19.2° 3.5°

10-22

16.3° 4.3°

10-23

12.4° 0.6°

0.94 mm

10-24

15.3° 2.2°

0.19 mm

10-25

11.7° 4.4°

1.0 mm

10-26

8.0° 4.5°

3.44 mm

10-27

7.8° 3.1°

0.25 mm

Both models agree Avg diff: 4.3°C

Where are air quality stations near Guelph?

Guelph, Ontario, Canada

0.9 km PM2.5: 5.0 µg/m³

Guelph, Ontario, Canada

0.9 km PM2.5: 6.0 µg/m³

Guelph, Ontario, Canada

0.9 km PM2.5: 4.3 µg/m³

Guelph, Ontario, Canada

0.9 km PM2.5: 5.0 µg/m³

Guelph, Ontario, Canada

0.9 km PM2.5: 5.3 µg/m³

Guelph, Ontario, Canada

0.9 km PM2.5: 5.3 µg/m³

Kitchener, Ontario, Canada

23.0 km PM2.5: 4.6 µg/m³

Kitchener, Ontario, Canada

23.0 km PM2.5: 5.3 µg/m³

Kitchener, Ontario, Canada

23.0 km PM2.5: 5.5 µg/m³

Kitchener, Ontario, Canada

23.0 km PM2.5: 5.8 µg/m³

What cities are near Guelph?

19 Hespeler 21 Fiddlesticks 22 Fergus 19 Vanier 23 Cambridge 23 Christopher-Champlain 18 Waterloo 20 Kitchener 19 Forest Heights 16 Halton Hills

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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 2026-10-21T00:31 UTC.