Today | Weather | Friday, October 9, 2026

Weather in Joliet, Illinois

05:18 PM
Now
Cloudy Weather
72° F
Feels Like 72°
Precipitation 40 %
Wind 6 mph
UV Index (0 - 11+) 1
Humidity 61 %
Today
Partly Sunny with Showers
Day 73°
Night 55°
Precipitation 100 %
Wind 5 mph
UV Index (0 - 11+) 4

Joliet Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 9, 2025)
Cloudy Night

Day

66°

Night

45°

Wind

5 mph

Precipitation

0 %

Air Quality in Joliet

NOW
69 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.22 µg/m³
PM10 8.17 µg/m³
O3 0.060 ppm
NO2 1.3 ppb
SO2 1.3 ppb
CO 0.11 ppm
NH3 1.51 µg/m³
NO 0.18 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.5 – 7.22 µg/m³
PM10 – 8.17 µg/m³
O3 – 117.96 µg/m³
NO2 – 2.36 µg/m³
SO2 – 3.38 µg/m³
CO – 126.31 µg/m³
NH3 – 1.51 µg/m³
NO – 0.18 µg/m³