Today | Weather | Tuesday, April 28, 2026

Weather in Waterbury, Connecticut

12:02 AM
Now
Night
46° F
Feels Like 46°
Precipitation 0 %
Wind 4 mph
Humidity 82 %
Today
Cloudy Weather
Day 66°
Night 39°
Precipitation 1 %
Wind 8 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

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.

Waterbury Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 28, 2025)
Sunny Weather

Day

75°

Night

46°

Wind

8 mph

UV Index

8

Precipitation

0 %

Air Quality in Waterbury

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

Pollutant Concentrations:

PM2.5 10.19 µg/m³
PM10 15.68 µg/m³
O3 0.039 ppm
NO2 14 ppb
SO2 0.8 ppb
CO 0.23 ppm
NH3 0.66 µg/m³
NO 0.01 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)
PM2.510.19 µg/m³
PM1015.68 µg/m³
O376.06 µg/m³
NO226.33 µg/m³
SO22.16 µg/m³
CO266.03 µg/m³
NH30.66 µg/m³
NO0.01 µg/m³