Today | Weather | Wednesday, May 20, 2026

Active Weather Warnings

Beach Hazards Statement

Weather in Oak Lawn, Illinois

04:53 PM

Now

59° F

Feels Like 55°

Precipitation 0 %

Wind 15 mph

UV Index (0 - 11+) 3

Humidity 47 %

Today

Day 63°

Night 48°

Precipitation 1 %

Wind 14 mph

UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Oak Lawn Weather Forecast Updated

18 minutes ago

Last updated on May 20, 2026 at 4:35 PM

Air Quality in Oak Lawn

NOW

44 AQI

Good air quality Dominant pollutant: O₃

Pollutant Concentrations:

PM_2.5 4.03 µg/m³

PM₁₀ 4.5 µg/m³

O₃ 0.048 ppm

NO₂ 0.9 ppb

SO₂ 0.9 ppb

CO 0.11 ppm

NH₃ 1.99 µg/m³

NO 0.16 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 – 4.03 µg/m³

PM₁₀ – 4.5 µg/m³

O₃ – 93.78 µg/m³

NO₂ – 1.73 µg/m³

SO₂ – 2.48 µg/m³

CO – 127.78 µg/m³

NH₃ – 1.99 µg/m³

NO – 0.16 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Oak Lawn

Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued May 20 at 4:11PM CDT until May 21 at 1:00PM CDT by NWS Chicago IL

May 20, 4:11 PM → May 21, 1:00 PM

WHAT: High wave action and dangerous currents expected at Lake
Michigan beaches. Waves 3 to 6 ft expected.

WHERE: Lake IL, Northern Cook and Central Cook Counties.

WHEN: Through Thursday afternoon.

IMPACTS: Swimming conditions will be life threatening,
especially for inexperienced swimmers. For information on swim
advisories or bans at Chicago beaches: www. cpdbeaches. com.

+ Read More

Remain out of the water to avoid dangerous swimming conditions and do not venture out onto piers, jetties, breakwalls, or other shoreline structures.

Updated: May 20, 4:34 PM Source: NWS Alert