Today | Weather | Sunday, April 5, 2026

Weather in Chicago, Illinois

05:55 AM
Now
Cloudy Night
37° F
Feels Like 27°
Precipitation 0 %
Wind 16 mph
Humidity 71 %
Today
Cloudy Weather
Day 54°
Night 39°
Precipitation 3 %
Wind 16 mph
UV Index (0 - 11+) 6

Chicago Weather Forecast Updated

38 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 5, 2025)
Cloudy Weather

Day

50°

Night

37°

Wind

12 mph

UV Index

3

Precipitation

23 %

Air Quality in Chicago

NOW
49 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.5 µg/m³
O3 0.053 ppm
NO2 0.4 ppb
SO2 0.1 ppb
CO 0.12 ppm
NH3 4.53 µg/m³
NO 0 µg/m³
PM2.5 – 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)
PM2.50.5 µg/m³
PM100.5 µg/m³
O3104.48 µg/m³
NO20.76 µg/m³
SO20.35 µg/m³
CO138.67 µg/m³
NH34.53 µg/m³
NO0 µg/m³