Today | Weather | Wednesday, February 25, 2026

Weather in Waterloo, Iowa

10:34 PM
Now
Cloudy Weather
27° F
Feels Like 27°
Precipitation 45 %
Wind 5 mph
Humidity 78 %
Today
Snowy Weather
Day 34°
Night 21°
Precipitation 65 %
Wind 5 mph
Overnight Frost 12 AM – 9 AM
Tomorrow Morning Frost 1 AM – 9 AM

Waterloo Weather Forecast Updated

13 minutes ago
Last updated on

Air Quality in Waterloo

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.56 µg/m³
PM10 3.95 µg/m³
O3 0.044 ppm
NO2 1.9 ppb
SO2 0.1 ppb
CO 0.15 ppm
NH3 1.09 µg/m³
NO 0 µg/m³
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide
NH3 – Ammonia
NO – Nitric oxide

Health Recommendations:

Air quality is considered satisfactory, and air pollution poses little or no risk.

Show raw pollutant concentrations (µg/m³)
PM2.53.56 µg/m³
PM103.95 µg/m³
O387.36 µg/m³
NO23.57 µg/m³
SO20.3 µg/m³
CO177.23 µg/m³
NH31.09 µg/m³
NO0 µg/m³