Today | Weather | Monday, October 12, 2026

Weather in Waterloo, Iowa

08:19 PM
Now
Cloudy Night
82° F
Feels Like 81°
Precipitation 0 %
Wind 12 mph
Humidity 54 %
Today
Cloudy Weather
Day 90°
Night 55°
Precipitation 25 %
Wind 14 mph
UV Index (0 - 11+) 4

Waterloo Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 12, 2025)
Partly Sunny with Showers

Day

77°

Night

57°

Wind

17 mph

UV Index

30

Precipitation

55 %

Air Quality in Waterloo

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.71 µg/m³
PM10 8.84 µg/m³
O3 0.048 ppm
NO2 1 ppb
SO2 0.4 ppb
CO 0.10 ppm
NH3 1.64 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)
PM2.5 – 5.71 µg/m³
PM10 – 8.84 µg/m³
O3 – 93.65 µg/m³
NO2 – 1.96 µg/m³
SO2 – 1.17 µg/m³
CO – 113.34 µg/m³
NH3 – 1.64 µg/m³
NO – 0 µg/m³