Today | Weather | Friday, October 9, 2026

Weather in Hartford, Connecticut

06:19 PM
Now
Cloudy Weather
66° F
Feels Like 64°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 1
Humidity 40 %
Today
Cloudy Weather
Day 70°
Night 43°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 4

Hartford Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (October 9, 2025)
Night

Day

57°

Night

32°

Wind

4 mph

Precipitation

0 %

Air Quality in Hartford

NOW
45 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 4.25 µg/m³
PM10 6.32 µg/m³
O3 0.049 ppm
NO2 6.9 ppb
SO2 1.5 ppb
CO 0.16 ppm
NH3 0.79 µg/m³
NO 0.34 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)
PM2.5 – 4.25 µg/m³
PM10 – 6.32 µg/m³
O3 – 95.24 µg/m³
NO2 – 12.91 µg/m³
SO2 – 3.85 µg/m³
CO – 178.34 µg/m³
NH3 – 0.79 µg/m³
NO – 0.34 µg/m³