Today | Weather | Friday, September 18, 2026

Active Weather Warnings

Beach Hazards Statement

Weather in Evanston, Illinois

09:02 PM

Now

68° F

Feels Like 64°

Precipitation 20 %

Wind 9 mph

Humidity 76 %

Today

Day 72°

Night 64°

Precipitation 70 %

Wind 10 mph

Evanston Weather Forecast Updated

Last updated on September 18, 2026 at 7:56 PM

Weather Forecast History

Last Year's Weather on This Day (September 18, 2025)

Day

77°

Night

66°

Wind

7 mph

UV Index

Precipitation

1 %

Air Quality in Evanston

NOW

43 AQI

Good air quality Dominant pollutant: PM_2.5

Pollutant Concentrations:

PM_2.5 10.39 µg/m³

PM₁₀ 11.21 µg/m³

O₃ 0.036 ppm

NO₂ 3.3 ppb

SO₂ 0.7 ppb

CO 0.18 ppm

NH₃ 0.78 µg/m³

NO 0 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 – 10.39 µg/m³

PM₁₀ – 11.21 µg/m³

O₃ – 71.04 µg/m³

NO₂ – 6.22 µg/m³

SO₂ – 1.93 µg/m³

CO – 204.35 µg/m³

NH₃ – 0.78 µg/m³

NO – 0 µg/m³

View Hourly Air Quality Forecast

Weather Alerts and Warnings for Evanston

Moderate Expected Likely

Beach Hazards Statement

Beach Hazards Statement issued September 18 at 3:02PM CDT until September 19 at 3:00PM CDT by NWS Chicago IL

Sep 18, 10:00 PM → Sep 19, 3:00 PM

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

WHERE: Northern Cook and Central Cook Counties.

WHEN: From 10 PM CDT this evening through Saturday afternoon.

IMPACTS: Swimming conditions will be life threatening,
especially for inexperienced swimmers.

+ 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: Sep 18, 7:56 PM Source: NWS Alert