Today | Weather | Saturday, September 19, 2026

Weather in Stamford, Connecticut

06:29 PM
Now
Cloudy Weather
66° F
Feels Like 66°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 1
Humidity 55 %
Today
Cloudy Weather
Day 70°
Night 61°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 5

Stamford Weather Forecast Updated

29 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 19, 2025)
Night

Day

84°

Night

55°

Wind

7 mph

Precipitation

1 %

Air Quality in Stamford

NOW
35 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.58 µg/m³
PM10 6.82 µg/m³
O3 0.038 ppm
NO2 1 ppb
SO2 0.3 ppb
CO 0.17 ppm
NH3 0.19 µg/m³
NO 0.07 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)
PM2.52.58 µg/m³
PM106.82 µg/m³
O374.62 µg/m³
NO21.93 µg/m³
SO20.82 µg/m³
CO191.47 µg/m³
NH30.19 µg/m³
NO0.07 µg/m³