Today | Weather | Wednesday, October 22, 2025

Weather in Janesville, Wisconsin

06:16 AM
Now
Rainy Weather
45° F
Feels Like 32°
Precipitation 44 %
Wind 20 mph
Humidity 77 %
Today
Cloudy Weather
Day 50°
Night 36°
Precipitation 14 %
Wind 19 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

Janesville Weather Forecast Updated

53 minutes ago
Last updated on

Air Quality in Janesville

NOW
30 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 0.5 µg/m³
PM10 0.5 µg/m³
O3 0.032 ppm
NO2 0.6 ppb
SO2 0.1 ppb
CO 0.09 ppm
NH3 1.86 µg/m³
NO 0 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)
PM2.50.5 µg/m³
PM100.5 µg/m³
O363.58 µg/m³
NO21.12 µg/m³
SO20.21 µg/m³
CO105.65 µg/m³
NH31.86 µg/m³
NO0 µg/m³