Today | Weather | Wednesday, April 1, 2026

Weather in Chicago, Illinois

12:05 AM
Now
Cloudy Night
39° F
Feels Like 28°
Precipitation 47 %
Wind 16 mph
Humidity 92 %
Today
Rainy Weather
Day 45°
Night 41°
Precipitation 55 %
Wind 20 mph
UV Index (0 - 11+) 2

Chicago Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 1, 2025)
Cloudy Weather

Day

45°

Night

39°

Wind

12 mph

UV Index

6

Precipitation

9 %

Air Quality in Chicago

NOW
38 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 9.06 µg/m³
PM10 9.94 µg/m³
O3 0.033 ppm
NO2 6.4 ppb
SO2 1.1 ppb
CO 0.18 ppm
NH3 1.07 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)
PM2.59.06 µg/m³
PM109.94 µg/m³
O365.07 µg/m³
NO211.95 µg/m³
SO22.84 µg/m³
CO206.01 µg/m³
NH31.07 µg/m³
NO0 µg/m³