Weather in Waterloo, Iowa

04:53 PM

Now

86° F

Feels Like 84°

Precipitation 0 %

Wind 17 mph

UV Index (0 - 11+) 11

Humidity 35 %

Today

Day 90°

Night 61°

Precipitation 0 %

Wind 16 mph

UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Waterloo Weather Forecast Updated

Last updated on October 04, 2025 3:17 PM

Air quality in Waterloo

NOW

61 AQI

Moderate air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 6.04 µg/m³

PM10 8.06 µg/m³

O₃ 53.14 ppb

NO₂ 1.56 ppb

SO₂ 0.48 ppb

CO 180.34 ppb

PM_2.5 – Fine particles <2.5μm

PM₁₀ – Inhalable particles <10μm

O₃ – Ozone

NO₂ – Nitrogen dioxide

SO₂ – Sulfur dioxide

CO – Carbon monoxide

Health Recommendations:

Air quality is currently in the acceptable range. However, sensitive individuals should be aware of potential risks from certain pollutants.

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Waterloo

Moderate Expected Observed

Special Weather Statement

Special Weather Statement issued October 4 at 2:58AM CDT by NWS Des Moines IA

Oct 4, 2:58 AM → Oct 4, 7:00 PM

WHAT...Strong winds from the south at 20 to 25 mph with gusts to
35 to 40 mph, dry cropland, above normal temperatures, and low
relative humidity between 30 and 36 percent will lead to elevated
fire danger today.

WHERE...All of Central Iowa

WHEN...Noon to 7pm today

IMPACTS...Any fires that ignite will spread rapidly, especially
in cropland.

PREPAREDNESS AND PRECAUTIONARY ACTIONS...Burning is discouraged under
these conditions. Also, take care to prevent the start of accidental
fires when smoking or operating vehicles and farm equipment
around dry vegetation or crops.

Updated: Oct 4, 3:17 PM Source: NWS Alert