Today | Weather | Monday, September 21, 2026

Active Weather Warnings

Beach Hazards Statement

Weather in Milwaukee, Wisconsin

01:52 PM

Now

61° F

Feels Like 57°

Precipitation 4 %

Wind 16 mph

UV Index (0 - 11+) 2

Humidity 78 %

Today

Day 63°

Night 52°

Precipitation 19 %

Wind 14 mph

UV Index (0 - 11+) 2

Milwaukee Weather Forecast Updated

16 minutes ago

Last updated on September 21, 2026 at 1:35 PM

Weather Forecast History

Last Year's Weather on This Day (September 21, 2025)

Day

77°

Night

61°

Wind

5 mph

Precipitation

96 %

Air Quality in Milwaukee

NOW

23 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 1.09 µg/m³

PM₁₀ 1.49 µg/m³

O₃ 0.025 ppm

NO₂ 3.1 ppb

SO₂ 0.7 ppb

CO 0.16 ppm

NH₃ 0.41 µg/m³

NO 0.81 µg/m³

PM_2.5 – 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)

PM_2.5 – 1.09 µg/m³

PM₁₀ – 1.49 µg/m³

O₃ – 48.12 µg/m³

NO₂ – 5.8 µg/m³

SO₂ – 1.75 µg/m³

CO – 186.51 µg/m³

NH₃ – 0.41 µg/m³

NO – 0.81 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Milwaukee

Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued September 21 at 12:28PM CDT until September 23 at 7:00PM CDT by NWS Milwaukee/Sullivan WI

Sep 21, 12:28 PM → Sep 23, 7:00 PM

WHAT: Life threatening waves of 4 to 8 feet and dangerous
currents are expected.

WHERE: Sheboygan, Ozaukee, Milwaukee, Racine and Kenosha
Counties.

WHEN: Through early Wednesday evening.

IMPACTS: Dangerous swimming conditions are expected due to
high waves and onshore winds.

+ Read More

Stay out of the water and away from dangerous areas like piers and breakwalls. Strong structural and longshore currents are expected. Rip currents are possible.

Updated: Sep 21, 1:35 PM Source: NWS Alert