Today | Weather | Wednesday, November 4, 2026

Weather in Chicago, Illinois

08:34 PM
Now
Rainy Weather
54° F
Feels Like 45°
Precipitation 45 %
Wind 15 mph
Humidity 83 %
Today
Rainy Weather
Day 64°
Night 52°
Precipitation 55 %
Wind 15 mph

Chicago Weather Forecast Updated

18 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 4, 2025)
Night

Day

64°

Night

52°

Wind

14 mph

Precipitation

13 %

Air Quality in Chicago

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.34 µg/m³
PM10 1.53 µg/m³
O3 0.036 ppm
NO2 1.4 ppb
SO2 0.5 ppb
CO 0.14 ppm
NH3 0.45 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)
PM2.5 – 1.34 µg/m³
PM10 – 1.53 µg/m³
O3 – 71.22 µg/m³
NO2 – 2.68 µg/m³
SO2 – 1.32 µg/m³
CO – 157.59 µg/m³
NH3 – 0.45 µg/m³
NO – 0 µg/m³