Today | Weather | Wednesday, May 20, 2026
Active Weather Warnings

Weather in New Britain, Connecticut

05:53 PM
Now
Stormy Weather
82° F
Feels Like 81°
Precipitation 48 %
Wind 12 mph
UV Index (0 - 11+) 1
Humidity 51 %
Today
Sunny with a Chance of Thunderstorms
Day 90°
Night 57°
Precipitation 56 %
Wind 9 mph
UV Index (0 - 11+) 9

Warning: High UV Index Today: 9

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 Britain Weather Forecast Updated

Last updated on

Air Quality in New Britain

NOW
44 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 5.09 µg/m³
PM10 7.28 µg/m³
O3 0.047 ppm
NO2 2.7 ppb
SO2 0.7 ppb
CO 0.12 ppm
NH3 0.35 µg/m³
NO 0.21 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)
PM2.55.09 µg/m³
PM107.28 µg/m³
O392.27 µg/m³
NO25.1 µg/m³
SO21.71 µg/m³
CO139.06 µg/m³
NH30.35 µg/m³
NO0.21 µg/m³

Weather Alerts and Warnings for New Britain

Moderate Expected Likely

Heat Advisory

Heat Advisory issued May 20 at 9:33AM EDT until May 20 at 8:00PM EDT by NWS Boston/Norton MA
May 20, 9:33 AM May 20, 8:00 PM
WHAT: Heat index values up to 96.

WHERE: Portions of northern Connecticut, central, eastern,
northeastern, southeastern, and western Massachusetts, and
northern Rhode Island.

WHEN: Until 8 PM EDT this evening.

IMPACTS: Hot temperatures and high humidity may cause heat
illnesses.
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Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Updated: May 20, 4:35 PM Source: NWS Alert