Today | Weather | Tuesday, April 7, 2026

Weather in Joliet, Illinois

04:16 PM
Now
Cloudy Weather
43° F
Feels Like 39°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 3
Humidity 41 %
Today
Cloudy Weather
Day 45°
Night 36°
Precipitation 1 %
Wind 9 mph
UV Index (0 - 11+) 6
Overnight Frost 3 AM – 3 AM

Joliet Weather Forecast Updated

37 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 7, 2025)
Cloudy Weather

Day

46°

Night

25°

Wind

15 mph

UV Index

3

Precipitation

40 %

Air Quality in Joliet

NOW
61 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.68 µg/m³
PM10 3.92 µg/m³
O3 0.057 ppm
NO2 0.6 ppb
SO2 0.5 ppb
CO 0.13 ppm
NH3 1.56 µg/m³
NO 0.21 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)
PM2.53.68 µg/m³
PM103.92 µg/m³
O3112.72 µg/m³
NO21.04 µg/m³
SO21.42 µg/m³
CO145.62 µg/m³
NH31.56 µg/m³
NO0.21 µg/m³