Today | Weather | Wednesday, March 18, 2026

Weather in New Britain, Connecticut

05:51 AM
Now
Cloudy Night
25° F
Feels Like 19°
Precipitation 0 %
Wind 7 mph
Humidity 49 %
Today
Cloudy Weather
Day 37°
Night 23°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 5
Tomorrow Morning Frost 4 AM – 4 AM

New Britain Weather Forecast Updated

14 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (March 18, 2025)

Day

57°

Night

34°

Air Quality in New Britain

NOW
45 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1 µg/m³
PM10 2.76 µg/m³
O3 0.049 ppm
NO2 3.4 ppb
SO2 1 ppb
CO 0.15 ppm
NH3 0.45 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)
PM2.51 µg/m³
PM102.76 µg/m³
O395.93 µg/m³
NO26.45 µg/m³
SO22.66 µg/m³
CO170.2 µg/m³
NH30.45 µg/m³
NO0 µg/m³