Today | Weather | Friday, October 9, 2026

Weather in Waterbury, Connecticut

06:19 PM
Now
Cloudy Weather
63° F
Feels Like 63°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 44 %
Today
Cloudy Weather
Day 70°
Night 41°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 4

Waterbury Weather Forecast Updated

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

Day

55°

Night

30°

Wind

5 mph

Precipitation

0 %

Air Quality in Waterbury

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.24 µg/m³
PM10 5.79 µg/m³
O3 0.050 ppm
NO2 6.3 ppb
SO2 1.4 ppb
CO 0.15 ppm
NH3 0.83 µg/m³
NO 0.26 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)
PM2.5 – 4.24 µg/m³
PM10 – 5.79 µg/m³
O3 – 98.88 µg/m³
NO2 – 11.78 µg/m³
SO2 – 3.74 µg/m³
CO – 176.16 µg/m³
NH3 – 0.83 µg/m³
NO – 0.26 µg/m³