Today | Weather | Wednesday, March 18, 2026

Weather in Stamford, Connecticut

06:21 AM
Now
Night
27° F
Feels Like 16°
Precipitation 0 %
Wind 12 mph
Humidity 50 %
Today
Cloudy Weather
Day 37°
Night 27°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 5

Stamford Weather Forecast Updated

9 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)
Sunny Weather

Day

59°

Night

37°

Wind

12 mph

UV Index

5

Precipitation

0 %

Air Quality in Stamford

NOW
41 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.61 µg/m³
PM10 5.04 µg/m³
O3 0.044 ppm
NO2 4.5 ppb
SO2 1.3 ppb
CO 0.16 ppm
NH3 0.71 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)
PM2.52.61 µg/m³
PM105.04 µg/m³
O386.68 µg/m³
NO28.5 µg/m³
SO23.5 µg/m³
CO183.61 µg/m³
NH30.71 µg/m³
NO0 µg/m³