Today | Weather | Thursday, September 25, 2025

Weather in Naperville, Illinois

07:17 AM
Now
Cloudy Weather
55° F
Feels Like 54°
Precipitation 1 %
Wind 7 mph
UV Index (0 - 11+) 0
Humidity 98 %
Today
Cloudy Weather
Day 75°
Night 52°
Precipitation 55 %
Wind 13
UV Index (0 - 11+) 11

Warning: Extreme UV Index Today: 11+

Overexposure to the sun's harmful UV rays can cause sunburn and increase the risk of developing skin cancer, including melanoma. Protect yourself by wearing clothing that covers your skin, sunglasses, and a hat. Apply a broad-spectrum sunscreen with an SPF of 30 or higher every two hours, even on cloudy days. Minimize direct sun exposure during peak hours (10 AM to 4 PM) to reduce the risk.

Naperville Weather Forecast Updated

28 minutes ago
Last updated on

Weather Forecast History

Last Year's Weather on This Day (September 25, 2024)

Cloudy Weather

Day

79°

Night

52°

Wind

6 mph

UV Index

5

Precipitation

3

Air quality in Naperville

NOW
30 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 5.97 µg/m³
PM10 6.01 µg/m³
O₃ 18.28 ppb
NO₂ 8.39 ppb
SO₂ 1.19 ppb
CO 180.95 ppb
PM2.5 – Fine particles <2.5μm
PM10 – Inhalable particles <10μm
O3 – Ozone
NO2 – Nitrogen dioxide
SO2 – Sulfur dioxide
CO – Carbon monoxide

Health Recommendations:

With this level of air quality, you have no limitations. Enjoy the outdoors