Today | Weather | Wednesday, December 24, 2025

Weather in Waterbury, Connecticut

01:07 PM
Now
Cloudy Weather
41° F
Feels Like 30°
Precipitation 0 %
Wind 17 mph
UV Index (0 - 11+) 2
Humidity 48 %
Today
Cloudy Weather
Day 43°
Night 25°
Precipitation 25 %
Wind 14 mph
UV Index (0 - 11+) 2

Waterbury Weather Forecast Updated

57 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 24, 2024)
Snowy Weather

Day

34°

Night

19°

Wind

6 mph

UV Index

2

Precipitation

80 %

Air Quality in Waterbury

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.11 µg/m³
PM10 2.19 µg/m³
O3 0.029 ppm
NO2 3.9 ppb
SO2 0.6 ppb
CO 0.17 ppm
NH3 0.51 µg/m³
NO 2.06 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)
PM2.51.11 µg/m³
PM102.19 µg/m³
O357.83 µg/m³
NO27.33 µg/m³
SO21.68 µg/m³
CO191.72 µg/m³
NH30.51 µg/m³
NO2.06 µg/m³