Today | Weather | Monday, September 21, 2026

Weather in New Britain, Connecticut

01:55 PM
Now
Cloudy Weather
64° F
Feels Like 68°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 5
Humidity 65 %
Today
Cloudy Weather
Day 68°
Night 54°
Precipitation 6 %
Wind 9 mph
UV Index (0 - 11+) 5

New Britain Weather Forecast Updated

22 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (September 21, 2025)
Cloudy Weather

Day

72°

Night

45°

Wind

6 mph

UV Index

50

Precipitation

1 %

Air Quality in New Britain

NOW
36 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.26 µg/m³
PM10 5.24 µg/m³
O3 0.039 ppm
NO2 2.6 ppb
SO2 0.6 ppb
CO 0.18 ppm
NH3 0.21 µg/m³
NO 0.67 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)
PM2.53.26 µg/m³
PM105.24 µg/m³
O375.92 µg/m³
NO24.87 µg/m³
SO21.65 µg/m³
CO207.43 µg/m³
NH30.21 µg/m³
NO0.67 µg/m³