Today | Weather | Wednesday, April 15, 2026

Weather in Waterloo, Iowa

05:35 AM
Now
Stormy Weather
55° F
Feels Like 54°
Precipitation 62 %
Wind 6 mph
Humidity 93 %
Today
Sunny with a Chance of Thunderstorms
Day 66°
Night 48°
Precipitation 88 %
Wind 10 mph
UV Index (0 - 11+) 3

Waterloo Weather Forecast Updated

16 minutes ago
Last updated on

Air Quality in Waterloo

NOW
22 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.54 µg/m³
PM10 1.65 µg/m³
O3 0.024 ppm
NO2 1.1 ppb
SO2 0.1 ppb
CO 0.12 ppm
NH3 2.3 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)
PM2.51.54 µg/m³
PM101.65 µg/m³
O347.07 µg/m³
NO22.02 µg/m³
SO20.27 µg/m³
CO131.94 µg/m³
NH32.3 µg/m³
NO0 µg/m³