What is the air quality in Waterloo today?

The current Air Quality Index (AQI) in Waterloo is 20 (Good). PM2.5 concentration is 4.87 µg/m³.

What is the temperature in Waterloo right now?

The current temperature in Waterloo is 4.4°C (feels like -1.6°C). Humidity is 64.4% and wind speed is 41.9 km/h.

Is it safe to go outside in Waterloo?

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

Air Quality in Waterloo, Canada

Windy

4.4°C · 64.4% humidity

4.4°

Feels -1.6°

Good

Air quality is satisfactory. Enjoy outdoor activities.

3 stations

Nearby Monitoring Stations

AQI Forecast

— 4pm

—

20 7pm

—

— 10pm

—

— 1am

—

— 4am

—

— 7am

—

— 10am

—

— 1pm

—

Station readings

Air Quality Index Trend

48h · 2 stn

View full history →

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

64.4%

Humidity

41.9 km/h

Wind ESE

1028.5 hPa

Pressure

0.0

UV Low

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5

4.87 µg/m³

PM10▲

27.4 µg/m³

050100150200300500

What is the weather forecast for Waterloo?

Temperature & Precipitation

PM2.5 Trend

48h · 2 stations

PM2.54.87 µg/m³ ✓ WHO

Good

PM1027.4 µg/m³

Good

UV INDEX0.0

Low

Station readings (3 stations within 25 km)

4.87

Median

3.74

Average

1.33

Low

5.8

High

PM2.5 µg/m³ · Model: 13.5 · Bias: +8.6

What is the 7-day forecast for Waterloo?

10-20

5.8° 2.9°

0.13 mm

10-21

18.5° 4.4°

10-22

14.3° 4.7°

10-23

12.5° 1.2°

1.06 mm

10-24

15.3° 2.1°

0.31 mm

10-25

11.8° 3.9°

1.56 mm

10-26

8.3° 4.1°

5.12 mm

Both models agree Avg diff: 4.1°C

Where are air quality stations near Waterloo?

Kitchener, Ontario, Canada

2.7 km PM2.5: 5.8 µg/m³

Kitchener, Ontario, Canada

2.7 km PM2.5: 5.8 µg/m³

Kitchener, Ontario, Canada

2.7 km PM2.5: 5.3 µg/m³

Kitchener, Ontario, Canada

2.7 km PM2.5: 5.5 µg/m³

Bushview Crescent Waterloo

5.4 km PM2.5: 1.2 µg/m³ PM10: 1.2 µg/m³

Guelph, Ontario, Canada

22.4 km PM2.5: 6.0 µg/m³

Guelph, Ontario, Canada

22.4 km PM2.5: 5.0 µg/m³

Guelph, Ontario, Canada

22.4 km PM2.5: 5.3 µg/m³

Guelph, Ontario, Canada

22.4 km PM2.5: 5.3 µg/m³

Guelph, Ontario, Canada

22.4 km PM2.5: 5.5 µg/m³

What cities are near Waterloo?

23 Kitchener 22 Forest Heights 22 Vanier 18 Hespeler 20 Fiddlesticks 23 Cambridge 23 Christopher-Champlain 17 Guelph 17 Fergus 28 Stratford

Get AQI alerts for Waterloo

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 2026-10-20T23:40 UTC.