Today | Weather | Wednesday, November 4, 2026

Weather in Stamford, Connecticut

12:57 AM
Now
Cloudy Night
59° F
Feels Like 57°
Precipitation 2 %
Wind 7 mph
Humidity 93 %
Today
Cloudy Weather
Day 72°
Night 57°
Precipitation 5 %
Wind 8 mph
UV Index (0 - 11+) 3

Stamford Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (November 4, 2025)
Cloudy Night

Day

61°

Night

39°

Wind

6 mph

Precipitation

0 %

Air Quality in Stamford

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.16 µg/m³
PM10 9.62 µg/m³
O3 0.039 ppm
NO2 3.9 ppb
SO2 0.4 ppb
CO 0.15 ppm
NH3 0.08 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)
PM2.5 – 5.16 µg/m³
PM10 – 9.62 µg/m³
O3 – 76.14 µg/m³
NO2 – 7.25 µg/m³
SO2 – 0.98 µg/m³
CO – 174.35 µg/m³
NH3 – 0.08 µg/m³
NO – 0 µg/m³