Today | Weather | Monday, April 27, 2026

Weather in Waterbury, Connecticut

08:55 PM
Now
Night
57° F
Feels Like 55°
Precipitation 0 %
Wind 6 mph
Humidity 53 %
Today
Night
Day 72°
Night 37°
Precipitation 0 %
Wind 4 mph

Waterbury Weather Forecast Updated

28 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 27, 2025)
Cloudy Weather

Day

55°

Night

46°

Wind

16 mph

UV Index

5

Precipitation

55 %

Air Quality in Waterbury

NOW
49 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 11.07 µg/m³
PM10 15.15 µg/m³
O3 0.052 ppm
NO2 8.9 ppb
SO2 1 ppb
CO 0.20 ppm
NH3 0.91 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)
PM2.511.07 µg/m³
PM1015.15 µg/m³
O3102.86 µg/m³
NO216.66 µg/m³
SO22.64 µg/m³
CO230.42 µg/m³
NH30.91 µg/m³
NO0 µg/m³