Today | Weather | Thursday, April 30, 2026

Weather in Danbury, Connecticut

10:38 AM
Now
Cloudy Weather
52° F
Feels Like 55°
Precipitation 34 %
Wind 4 mph
UV Index (0 - 11+) 1
Humidity 81 %
Today
Cloudy Weather
Day 57°
Night 37°
Precipitation 59 %
Wind 5 mph
UV Index (0 - 11+) 2

Danbury Weather Forecast Updated

Air Quality in Danbury

NOW
25 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.2 µg/m³
PM10 8.06 µg/m³
O3 0.027 ppm
NO2 16 ppb
SO2 1.6 ppb
CO 0.22 ppm
NH3 0.55 µg/m³
NO 4.25 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)
PM2.55.2 µg/m³
PM108.06 µg/m³
O353.74 µg/m³
NO230.06 µg/m³
SO24.18 µg/m³
CO251.35 µg/m³
NH30.55 µg/m³
NO4.25 µg/m³