Today | Weather | Monday, July 20, 2026

Weather in West Haven, Connecticut

05:28 PM
Now
Cloudy Weather
79° F
Feels Like 79°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 3
Humidity 48 %
Today
Sunny Weather
Day 79°
Night 64°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 10

Warning: High UV Index Today: 10

High risk of harm from unprotected sun exposure. Take precautions: wear a hat, sunglasses, and apply sunscreen regularly if you’ll be outdoors for extended periods.

West Haven Weather Forecast Updated

59 minutes ago
Last updated on

Air Quality in West Haven

NOW
78 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 10.53 µg/m³
PM10 12.44 µg/m³
O3 0.063 ppm
NO2 0.6 ppb
SO2 0.5 ppb
CO 0.11 ppm
NH3 0.18 µg/m³
NO 0.15 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.510.53 µg/m³
PM1012.44 µg/m³
O3123.58 µg/m³
NO21.2 µg/m³
SO21.34 µg/m³
CO127.13 µg/m³
NH30.18 µg/m³
NO0.15 µg/m³