What is the air quality in Waterloo today?

The current Air Quality Index (AQI) in Waterloo is 30 (Good). PM2.5 concentration is 7.2 µg/m³.

What is the temperature in Waterloo right now?

The current temperature in Waterloo is 25.9°C (feels like 25.9°C). Humidity is 67.5% and wind speed is 31.8 km/h.

Is it safe to go outside in Waterloo?

Air quality is satisfactory. Enjoy outdoor activities. The UV Index is 19.9 (Extreme).

Air Quality in Waterloo, United States

Partly Cloudy

25.9°C · 67.5% humidity

25.9°

Feels 25.9°

Good

Air quality is satisfactory. Enjoy outdoor activities.

1 station

Nearby Monitoring Stations

AQI Forecast

24 12pm

30 3pm

26 6pm

25 9pm

24 12am

25 3am

27 6am

25 9am

Air Quality Index Trend

16h · 1 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.

67.5%

Humidity

31.8 km/h

Wind SE

1015.2 hPa

Pressure

19.9

UV Extreme

GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲

7.2 µg/m³

PM10

20.55 µg/m³

050100150200300500

What is the weather forecast for Waterloo?

Temperature & Precipitation

PM2.5 Trend

16h · 1 station

PM2.57.2 µg/m³ ✓ WHO

Good

PM1020.55 µg/m³

Good

UV INDEX19.9

Extreme

Station readings (1 station within 25 km)

7.2

Median

7.2

Average

7.2

Low

7.2

High

PM2.5 µg/m³ · Model: 9.65 · Bias: +2.5

What is the 7-day forecast for Waterloo?

07-21

25.9° 22.3°

3.88 mm

07-22

25.6° 19.1°

3.5 mm

07-23

22.7° 16.9°

9.94 mm

07-24

28.7° 16.4°

07-25

23.6° 16.6°

0.19 mm

07-26

23.5° 19.7°

2.69 mm

07-27

25.2° 18.2°

Both models agree Avg diff: 4.6°C

Where are air quality stations near Waterloo?

Water Tower, Waterloo, Iowa, USA

2.4 km PM2.5: 2.2 µg/m³

Water Tower, Waterloo, Iowa, USA

2.4 km PM2.5: 9.1 µg/m³

Water Tower, Waterloo, Iowa, USA

2.4 km PM2.5: 16.9 µg/m³

What cities are near Waterloo?

30 Cedar Falls 42 Marshalltown 33 Cedar Rapids 33 Marion 28 Mason City 33 North Liberty 33 Coralville 33 Iowa City 43 Ames 38 Altoona

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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 2026-07-21T20:29 UTC.