Today | Weather | Thursday, December 4, 2025

Weather in New Haven, Connecticut

04:29 AM
Now
Night
28° F
Feels Like 25°
Precipitation 0 %
Wind 7 mph
Humidity 85 %
Today
Partly Sunny with a Chance of Snow
Day 43°
Night 12°
Precipitation 55 %
Wind 15 mph
UV Index (0 - 11+) 2

New Haven Weather Forecast Updated

31 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 4, 2024)
Snowy Weather

Day

45°

Night

36°

Wind

15 mph

Precipitation

100 %

Air Quality in New Haven

NOW
48 AQI
Good air quality Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 11.56 µg/m³
PM10 14.94 µg/m³
O3 0.026 ppm
NO2 8.2 ppb
SO2 2.8 ppb
CO 0.20 ppm
NH3 0.09 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)
PM2.511.56 µg/m³
PM1014.94 µg/m³
O350.21 µg/m³
NO215.51 µg/m³
SO27.24 µg/m³
CO227.41 µg/m³
NH30.09 µg/m³
NO0 µg/m³