Today | Weather | Monday, July 20, 2026

Weather in Hartford, Connecticut

07:42 PM
Now
Cloudy Weather
75° F
Feels Like 73°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 0
Humidity 49 %
Today
Cloudy Night
Day 82°
Night 61°
Precipitation 2 %
Wind 6 mph

Hartford Weather Forecast Updated

30 minutes ago
Last updated on
Weather Forecast History
Last Year's Weather on This Day (July 20, 2025)
Stormy Weather

Day

90°

Night

66°

Wind

12 mph

Precipitation

55 %

Air Quality in Hartford

NOW
67 AQI
Moderate air quality Dominant pollutant: O3

Pollutant Concentrations:

PM2.5 8.23 µg/m³
PM10 10.31 µg/m³
O3 0.059 ppm
NO2 3.6 ppb
SO2 1 ppb
CO 0.12 ppm
NH3 0.43 µg/m³
NO 0.09 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 acceptable; however, for some pollutants, there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution.

Show raw pollutant concentrations (µg/m³)
PM2.58.23 µg/m³
PM1010.31 µg/m³
O3116.53 µg/m³
NO26.72 µg/m³
SO22.58 µg/m³
CO138.45 µg/m³
NH30.43 µg/m³
NO0.09 µg/m³