Today | Weather | Friday, December 12, 2025

Weather in Hartford, Connecticut

02:20 PM
Now
Cloudy Weather
36° F
Feels Like 25°
Precipitation 0 %
Wind 15 mph
UV Index (0 - 11+) 2
Humidity 40 %
Today
Sunny Weather
Day 36°
Night 23°
Precipitation 1 %
Wind 12 mph
UV Index (0 - 11+) 2

Hartford Weather Forecast Updated

11 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (December 12, 2024)
Night

Day

39°

Night

25°

Wind

12 mph

Precipitation

1 %

Air Quality in Hartford

NOW
34 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.16 µg/m³
PM10 5.75 µg/m³
O3 0.036 ppm
NO2 6.6 ppb
SO2 1.4 ppb
CO 0.16 ppm
NH3 0.87 µg/m³
NO 3.21 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)
PM2.53.16 µg/m³
PM105.75 µg/m³
O371.27 µg/m³
NO212.42 µg/m³
SO23.56 µg/m³
CO182.41 µg/m³
NH30.87 µg/m³
NO3.21 µg/m³