Today | Weather | Wednesday, September 9, 2026

Weather in Waterbury, Connecticut

09:00 PM
Now
Cloudy Weather
72° F
Feels Like 72°
Precipitation 47 %
Wind 8 mph
Humidity 90 %
Today
Rainy Weather
Day 81°
Night 66°
Precipitation 84 %
Wind 8 mph

Waterbury Weather Forecast Updated

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

Day

72°

Night

52°

Wind

6 mph

Precipitation

49 %

Air Quality in Waterbury

NOW
50 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 7.07 µg/m³
PM10 12.83 µg/m³
O3 0.054 ppm
NO2 2.2 ppb
SO2 0.6 ppb
CO 0.10 ppm
NH3 0.37 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)
PM2.57.07 µg/m³
PM1012.83 µg/m³
O3106.01 µg/m³
NO24.08 µg/m³
SO21.64 µg/m³
CO119.05 µg/m³
NH30.37 µg/m³
NO0 µg/m³