Today | Weather | Tuesday, September 22, 2026

Weather in Hartford, Connecticut

11:44 PM
Today
Cloudy Night
Day 66°
Night 48°
Precipitation 1 %
Wind 6 mph

Hartford Weather Forecast Updated

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

Day

75°

Night

57°

Wind

6 mph

Precipitation

22 %

Air Quality in Hartford

NOW
27 AQI
Good air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 1.3 µg/m³
PM10 4.11 µg/m³
O3 0.029 ppm
NO2 2.5 ppb
SO2 0.4 ppb
CO 0.17 ppm
NH3 0.12 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)
PM2.51.3 µg/m³
PM104.11 µg/m³
O357.88 µg/m³
NO24.71 µg/m³
SO21.16 µg/m³
CO190.05 µg/m³
NH30.12 µg/m³
NO0 µg/m³