Today | Weather | Wednesday, February 25, 2026

Weather in Waterloo, Iowa

11:43 PM
Now
Cloudy Weather
27° F
Feels Like 27°
Precipitation 34 %
Wind 4 mph
Humidity 82 %
Today
Cloudy Weather
Day 39°
Night 28°
Precipitation 2 %
Wind 9 mph
UV Index (0 - 11+) 2
Overnight Frost 12 AM – 9 AM
Tomorrow Morning Frost 1 AM – 9 AM

Waterloo Weather Forecast Updated

Last updated on

Air Quality in Waterloo

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.43 µg/m³
PM10 3.82 µg/m³
O3 0.044 ppm
NO2 1.8 ppb
SO2 0.1 ppb
CO 0.15 ppm
NH3 1.1 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)
PM2.53.43 µg/m³
PM103.82 µg/m³
O386.91 µg/m³
NO23.4 µg/m³
SO20.3 µg/m³
CO175.6 µg/m³
NH31.1 µg/m³
NO0 µg/m³