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Westport (Connecticut) (US)

Air Quality Trend (last 7 days)

Good (0-50)
Moderate (51-100)
Unhealthy for Sensitive Groups (101-150)
Unhealthy (151-200)
Very Unhealthy (201-300)
Hazardous (300+)

Weather - 48h MET Norway

Rain
16°C
Rain
Humidity
65.4%
Wind
8 m/s
Pressure
1018.3 hPa
Direction
222°
Sunrise
04:00
Sunset
16:00
24h Forecast:
Temp.
12° / 22°
Precip.
23.3mm
Max wind
9.6 m/s

Hourly Forecast

30.03
Now
Weather
16°
0.6
8
31.03
00:00
Weather
14°
7
31.03
01:00
Weather
14°
7
31.03
02:00
Weather
14°
6
31.03
03:00
Weather
13°
6
31.03
04:00
Weather
12°
6
31.03
05:00
Weather
12°
7
31.03
06:00
Weather
13°
8
31.03
07:00
Weather
14°
1.7
9
31.03
08:00
Weather
13°
3
7
31.03
09:00
Weather
12°
1.8
7
31.03
10:00
Weather
13°
0.5
8
31.03
11:00
Weather
12°
8.3
8
31.03
12:00
Weather
12°
0.9
7
31.03
13:00
Weather
13°
0.9
9
31.03
14:00
Weather
14°
5.6
9
31.03
15:00
Weather
16°
8
31.03
16:00
Weather
17°
10
31.03
17:00
Weather
19°
8
31.03
18:00
Weather
20°
9
31.03
19:00
Weather
22°
8
31.03
20:00
Weather
21°
9
31.03
21:00
Weather
20°
10
31.03
22:00
Weather
19°
9

Temperature

22°C
12°C
23:00
16°C
00:00
14°C
01:00
14°C
02:00
14°C
03:00
13°C
04:00
12°C
05:00
12°C
06:00
13°C
07:00
14°C
08:00
13°C
09:00
12°C
10:00
13°C
11:00
12°C
12:00
12°C
13:00
13°C
14:00
14°C
15:00
16°C
16:00
17°C
17:00
19°C
18:00
20°C
19:00
22°C
20:00
21°C
21:00
20°C
22:00
19°C
23:00 10:00 22:00

Precipitation

8.3mm
0mm
23:00
0.6mm
07:00
1.7mm
08:00
3mm
09:00
1.8mm
10:00
0.5mm
11:00
8.3mm
12:00
0.9mm
13:00
0.9mm
14:00
5.6mm
23:00 10:00 22:00

Wind

9.6m/s
0m/s
23:00
8.1 m/s
00:00
7.4 m/s
01:00
7.4 m/s
02:00
6.3 m/s
03:00
6.3 m/s
04:00
6.3 m/s
05:00
6.7 m/s
06:00
8 m/s
07:00
8.6 m/s
08:00
6.9 m/s
09:00
6.5 m/s
10:00
7.5 m/s
11:00
8.1 m/s
12:00
6.7 m/s
13:00
9.4 m/s
14:00
9.4 m/s
15:00
7.7 m/s
16:00
9.5 m/s
17:00
8.4 m/s
18:00
8.9 m/s
19:00
8 m/s
20:00
8.7 m/s
21:00
9.6 m/s
22:00
9 m/s
23:00 10:00 22:00

Radiation

No sensor within 100 km.

We display the worst measurements from all stations in the area. This approach provides a more cautious assessment of air quality, accounting for local pollution sources.

AQI
72.3 km
144
48%

Measurement time: 2026-03-30 23:00

Calculated from PM2.5/PM10

PM2.5
72.3 km
53 µg/m3
63.1%

Measurement time: 2026-03-30 23:00

source: Aqicn

O3
35.4 km
43.2 µg/m3
27%

Measurement time: 2026-03-30 23:00

source: Aqicn

PM10
93.8 km
26 µg/m3
18.6%

Measurement time: 2026-03-31 00:00

source: Aqicn

NO2
72.3 km
8 µg/m3
4%

Measurement time: 2026-03-30 23:00

source: Aqicn

CO
35.4 km
0.0037 mg/m3
0%

Measurement time: 2026-03-30 23:00

source: Aqicn

Info


Latitude: 41.14149
Longitude: -73.3579


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About Air Quality in Westport

Air quality in Westport is monitored in real-time by sensors and measurement stations. On this page you'll find current data on major air pollutants including particulate matter PM2.5 and PM10, nitrogen dioxide (NO2), ozone (O3), and radiation levels.

Common Pollutants in Westport

  • PM2.5 - fine particulate matter up to 2.5 micrometers, particularly harmful to health
  • PM10 - particulate matter up to 10 micrometers from traffic and industry
  • NO2 - nitrogen dioxide mainly emitted by vehicles
  • O3 - tropospheric ozone formed in photochemical reactions

When is Air Quality Best in Westport?

Generally, the best air quality occurs:

  • Early morning (5:00-7:00 AM) before rush hour traffic
  • After rainfall which cleanses the atmosphere
  • During strong winds that disperse pollutants
  • In summer months when heating systems are less used

Tips for Runners in Westport

If you're planning outdoor activities in Westport, always check the current AQI value. When AQI exceeds 100, consider moving your workout indoors or shortening the distance. People with respiratory issues, children, and seniors should be especially cautious during elevated pollution levels. Choose routes away from busy streets and industrial areas.