Today | Weather | Thursday, October 30, 2025

Weather in Chicago, Illinois

01:30 PM
Now
Cloudy Weather
54° F
Feels Like 50°
Precipitation 0 %
Wind 15 mph
UV Index (0 - 11+) 3
Humidity 58 %
Today
Cloudy Weather
Day 55°
Night 43°
Precipitation 0 %
Wind 15 mph
UV Index (0 - 11+) 3

Chicago Weather Forecast Updated

2 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (October 30, 2024)

Rainy Night

Day

81°

Night

64°

Wind

19 mph

Precipitation

75

Air Quality in Chicago

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.23 µg/m³
PM10 4.03 µg/m³
O3 0.035 ppm
NO2 2.4 ppb
SO2 1.1 ppb
CO 0.12 ppm
NH3 1.05 µg/m³
NO 1.65 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)
PM2.53.23 µg/m³
PM104.03 µg/m³
O369.4 µg/m³
NO24.59 µg/m³
SO22.77 µg/m³
CO137.66 µg/m³
NH31.05 µg/m³
NO1.65 µg/m³