Today | Weather | Friday, February 20, 2026

Weather in Chicago, Illinois

04:55 PM
Now
Cloudy Weather
34° F
Feels Like 16°
Precipitation 22 %
Wind 21 mph
Humidity 68 %
Today
Snowy Weather
Day 36°
Night 27°
Precipitation 60 %
Wind 23 mph
UV Index (0 - 11+) 1
Tomorrow Morning Frost 7 AM – 8 AM

Chicago Weather Forecast Updated

35 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (February 20, 2025)
Cold Day

Day

25°

Night

10°

Wind

11 mph

UV Index

3

Precipitation

14 %

Air Quality in Chicago

NOW
35 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.15 µg/m³
PM10 1.34 µg/m³
O3 0.038 ppm
NO2 1.4 ppb
SO2 0.5 ppb
CO 0.15 ppm
NH3 0.41 µg/m³
NO 0.19 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)
PM2.51.15 µg/m³
PM101.34 µg/m³
O374.93 µg/m³
NO22.67 µg/m³
SO21.44 µg/m³
CO166.26 µg/m³
NH30.41 µg/m³
NO0.19 µg/m³