Today | Weather | Tuesday, August 11, 2026

Weather in Hartford, Connecticut

10:17 AM
Now
Cloudy Weather
79° F
Feels Like 84°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 4
Humidity 67 %
Today
Cloudy Weather
Day 88°
Night 64°
Precipitation 2 %
Wind 8 mph
UV Index (0 - 11+) 8

Warning: High UV Index Today: 8

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.

Hartford Weather Forecast Updated

Last updated on
Weather Forecast History
Last Year's Weather on This Day (August 11, 2025)
Night

Day

91°

Night

63°

Wind

5 mph

Precipitation

0 %

Air Quality in Hartford

NOW
26 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 3.92 µg/m³
PM10 5.56 µg/m³
O3 0.028 ppm
NO2 6.7 ppb
SO2 1.7 ppb
CO 0.17 ppm
NH3 0.56 µg/m³
NO 2.85 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)
PM2.53.92 µg/m³
PM105.56 µg/m³
O355.37 µg/m³
NO212.7 µg/m³
SO24.41 µg/m³
CO191.31 µg/m³
NH30.56 µg/m³
NO2.85 µg/m³