❮
Today Tomorrow Hourly 7 days 30 days January
❯
Today | Weather | Monday, January 5, 2026
Active Weather Warnings

Weather in Waterloo, Iowa

08:06 AM
Now
Foggy Weather
27° F
Feels Like 28°
Precipitation 0 %
Wind 2 mph
UV Index (0 - 11+) 0
Humidity 97 %
Today
Cloudy Weather
Day 39°
Night 32°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 2

Waterloo Weather Forecast Updated

6 minutes ago
Last updated on

Air Quality in Waterloo

NOW
50 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 12.03 µg/m³
PM10 12.81 µg/m³
O3 0.020 ppm
NO2 4 ppb
SO2 0.1 ppb
CO 0.20 ppm
NH3 0.21 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 – 12.03 µg/m³
PM10 – 12.81 µg/m³
O3 – 39.84 µg/m³
NO2 – 7.5 µg/m³
SO2 – 0.16 µg/m³
CO – 226.26 µg/m³
NH3 – 0.21 µg/m³
NO – 0 µg/m³
View Hourly Air Quality Forecast

Weather Alerts and Warnings for Waterloo

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued January 5 at 5:55AM CST by NWS Des Moines IA
Jan 5, 5:55 AM → Jan 5, 9:00 AM
WHAT...Widespread fog with visibilities around or under a mile.
Local areas with dense fog and visibilities of one quarter mile or
less. In addition, fog is developing on roadways leading to slick
conditions.

WHERE...Along and north of Highway 20 in north central Iowa.

WHEN...Through 9 am this morning.

IMPACTS...Drivers should be alert for reduced visibility at times.
With temperatures below freezing, this fog is causing areas with slick
or icy surfaces due to frost formation, especially on untreated
roads, bridges, and overpasses.

PREPAREDNESS AND PRECAUTIONARY ACTIONS...If driving this morning,
please use low beam headlights.
Updated: Jan 5, 8:00 AM Source: NWS Alert