Today | Weather | Monday, April 27, 2026

Weather in New Haven, Connecticut

01:38 PM
Now
Cloudy Weather
63° F
Feels Like 70°
Precipitation 0 %
Wind 10 mph
UV Index (0 - 11+) 7
Humidity 44 %
Today
Sunny Weather
Day 63°
Night 43°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

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.

New Haven Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (April 27, 2025)
Partly Sunny with Showers

Day

59°

Night

48°

Wind

15 mph

UV Index

4

Precipitation

80 %

Air Quality in New Haven

NOW
142 AQI
Unhealthy air quality for sensitive groups Dominant pollutant: PM2.5

Pollutant Concentrations:

PM2.5 52.24 µg/m³
PM10 60.69 µg/m³
O3 0.082 ppm
NO2 12.9 ppb
SO2 1.4 ppb
CO 0.33 ppm
NH3 0.1 µg/m³
NO 4.31 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:

Members of sensitive groups may experience health effects. The general public is not likely to be affected.

Show raw pollutant concentrations (µg/m³)
PM2.552.24 µg/m³
PM1060.69 µg/m³
O3161.91 µg/m³
NO224.31 µg/m³
SO23.74 µg/m³
CO379.12 µg/m³
NH30.1 µg/m³
NO4.31 µg/m³