Today | Weather | Saturday, September 19, 2026

Weather in New Haven, Connecticut

01:22 PM
Now
Cloudy Weather
68° F
Feels Like 72°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 5
Humidity 49 %
Today
Cloudy Weather
Day 70°
Night 59°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 5

New Haven Weather Forecast Updated

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

Day

82°

Night

55°

Wind

8 mph

Precipitation

1 %

Air Quality in New Haven

NOW
33 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 2.29 µg/m³
PM10 5.24 µg/m³
O3 0.036 ppm
NO2 1.3 ppb
SO2 0.5 ppb
CO 0.17 ppm
NH3 0.35 µg/m³
NO 0.28 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)
PM2.52.29 µg/m³
PM105.24 µg/m³
O370.16 µg/m³
NO22.48 µg/m³
SO21.36 µg/m³
CO194.36 µg/m³
NH30.35 µg/m³
NO0.28 µg/m³