Today | Weather | Sunday, May 31, 2026

Weather in Danbury, Connecticut

12:48 PM
Now
Cloudy Weather
70° F
Feels Like 77°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 10
Humidity 37 %
Today
Cloudy Weather
Day 73°
Night 52°
Precipitation 14 %
Wind 7 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

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.

Danbury Weather Forecast Updated

3 minutes ago
Last updated on

Air Quality in Danbury

NOW
47 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.88 µg/m³
PM10 5.65 µg/m³
O3 0.051 ppm
NO2 1.6 ppb
SO2 0.5 ppb
CO 0.11 ppm
NH3 0.6 µg/m³
NO 0.65 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)
PM2.54.88 µg/m³
PM105.65 µg/m³
O399.91 µg/m³
NO23.01 µg/m³
SO21.43 µg/m³
CO130.48 µg/m³
NH30.6 µg/m³
NO0.65 µg/m³