Today | Weather | Sunday, March 15, 2026

Active Weather Warnings

Wind Advisory

Weather in Chicago, Illinois

04:55 PM

Now

64° F

Feels Like 55°

Precipitation 84 %

Wind 22 mph

UV Index (0 - 11+) 0

Humidity 74 %

Today

Day 64°

Night 25°

Precipitation 98 %

Wind 17 mph

UV Index (0 - 11+) 1

FROST FORECAST

Tomorrow Morning Frost 8 AM – 8 AM

Chicago Weather Forecast Updated

20 minutes ago

Last updated on March 15, 2026 at 4:35 PM

Weather Forecast History

Last Year's Weather on This Day (March 15, 2025)

Day

66°

Night

34°

Wind

22 mph

UV Index

Precipitation

21 %

Air Quality in Chicago

NOW

48 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 1.39 µg/m³

PM₁₀ 1.57 µg/m³

O₃ 0.052 ppm

NO₂ 1 ppb

SO₂ 0.3 ppb

CO 0.11 ppm

NH₃ 0.27 µg/m³

NO 0.03 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 – 1.39 µg/m³

PM₁₀ – 1.57 µg/m³

O₃ – 101.23 µg/m³

NO₂ – 1.8 µg/m³

SO₂ – 0.67 µg/m³

CO – 125.41 µg/m³

NH₃ – 0.27 µg/m³

NO – 0.03 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Chicago

Moderate Expected Likely

Wind Advisory

Wind Advisory issued March 15 at 3:29PM CDT until March 15 at 9:00PM CDT by NWS Chicago IL

Mar 15, 3:29 PM → Mar 15, 9:00 PM

WHAT: Southwest winds 20 to 30 mph with gusts up to 45 mph.

WHERE: Central Cook and Kendall Counties.

WHEN: Until 9 PM CDT this evening.

IMPACTS: Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.

+ Read More

Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

Updated: Mar 15, 4:34 PM Source: NWS Alert