Today | Weather | Wednesday, April 1, 2026

Weather in Chicago, Illinois

04:23 AM
Now
Cloudy Night
37° F
Feels Like 25°
Precipitation 7 %
Wind 17 mph
Humidity 88 %
Today
Rainy Weather
Day 43°
Night 39°
Precipitation 55 %
Wind 20 mph
UV Index (0 - 11+) 2

Chicago Weather Forecast Updated

46 minutes ago
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
46 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 6.01 µg/m³
PM10 6.67 µg/m³
O3 0.050 ppm
NO2 2.5 ppb
SO2 1 ppb
CO 0.16 ppm
NH3 1.74 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)
PM2.56.01 µg/m³
PM106.67 µg/m³
O397.87 µg/m³
NO24.78 µg/m³
SO22.63 µg/m³
CO184.13 µg/m³
NH31.74 µg/m³
NO0 µg/m³