Today | Weather | Wednesday, March 18, 2026

Weather in Danbury, Connecticut

05:50 AM
Now
Cloudy Night
23° F
Feels Like 19°
Precipitation 0 %
Wind 6 mph
Humidity 49 %
Today
Cloudy Weather
Day 37°
Night 25°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5
Tomorrow Morning Frost 6 AM – 6 AM

Danbury Weather Forecast Updated

3 minutes ago
Last updated on

Air Quality in Danbury

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.13 µg/m³
PM10 4.42 µg/m³
O3 0.045 ppm
NO2 4.7 ppb
SO2 1.3 ppb
CO 0.16 ppm
NH3 0.63 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)
PM2.52.13 µg/m³
PM104.42 µg/m³
O387.81 µg/m³
NO28.81 µg/m³
SO23.29 µg/m³
CO179.41 µg/m³
NH30.63 µg/m³
NO0 µg/m³