Air Quality in Hartford, United States

Heavy Rain
17.9°C · 97.8% humidity
17.9°
Feels 17.9°
63
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
Model forecast

Nearby Monitoring Stations

AQI Forecast
54 10am
34
34
63 1pm
55
49
45 4pm
42
39
38 7pm
37
27
26 10pm
26
26
25 1am
24
24
24 4am
24
24
24 7am
24
25
AD 728×90

Air Quality Index Trend

45h · 1 stn

Hartford's air quality is primarily affected by vehicle emissions and industrial activity. Seasonal wildfire smoke and weather patterns can cause periodic air quality deterioration. Current PM2.5 concentration in Hartford is 1.2× the WHO 24-hour guideline of 15 µg/m³.

97.8%
Humidity
60.6 km/h
Wind N
1013.5 hPa
Pressure
19.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous

Which pollutant is driving the AQI?

PM2.5▲
63
17.65 µg/m³
PM10
38
41.15 µg/m³
050100150200300500

What is the weather forecast for Hartford?

Temperature & Precipitation

PM2.5 Trend

45h · 1 station
PM2.517.65 µg/m³ ×1.2 WHO
Moderate
PM1041.15 µg/m³
Good
UV INDEX19.9
Extreme
AD 300×250

What is the 7-day forecast for Hartford?

07-21
25.7° 17.9°
11.87 mm
07-22
22.7° 14.3°
24.06 mm
07-23
27.0° 16.2°
2.19 mm
07-24
26.1° 16.0°
2.56 mm
07-25
33.6° 19.8°
6.13 mm
07-26
23.6° 17.2°
5.0 mm
07-27
29.2° 20.0°
1.44 mm
Both models agree Avg diff: 3.2°C

Where are air quality stations near Hartford?

26
Hartford, Connecticut, USA
1.4 km PM2.5: 6.2 µg/m³
22
Hartford, Connecticut, USA
1.4 km PM2.5: 5.3 µg/m³
51
Hartford, Connecticut, USA
1.4 km PM2.5: 12.1 µg/m³
72
East Hartford, Connecticut, USA
5.2 km PM2.5: 22.1 µg/m³

What cities are near Hartford?

63 West Hartford 63 Wethersfield 63 East Hartford 63 Bloomfield 63 Newington 63 South Windsor 63 Glastonbury 63 Windsor 63 Farmington 63 New Britain
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Data sources: Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-07-21T17:14 UTC.