Air Quality in Port Arthur, United States
Rain
23.4°C · 90.3% humidity
23.4°
Feels 23.4°
54
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
1 station
Nearby Monitoring Stations
Port Arthur's air quality — share it
AQI Forecast
34
6am
27
54
54
9am
48
44
41
12pm
39
31
30
3pm
29
28
28
6pm
35
35
54
9pm
54
54
54
12am
54
54
54
3am
54
34
Air Quality Index Trend
46h · 1 stnPort Arthur'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 Port Arthur is 2.7× the WHO annual guideline of 5 µg/m³.
90.3%
Humidity
22.0 km/h
Wind W
1011.8 hPa
Pressure
5.9
UV High
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
13.5 µg/m³
PM10
13.7 µg/m³
050100150200300500
What is the weather forecast for Port Arthur?
Temperature & Precipitation
PM2.5 Trend
46h · 1 stationPM2.513.5 µg/m³
✓ WHO
Moderate
PM1013.7 µg/m³
Good
UV INDEX5.9
High
Station readings (1 station within 25 km)
13.5
Median
13.5
Average
13.5
Low
13.5
High
PM2.5 µg/m³ · Model: 7.0 · Bias: -6.5
What is the 7-day forecast for Port Arthur?
05-29
33.2° 20.6°
9.75 mm
05-30
28.1° 23.5°
0.31 mm
05-31
31.9° 19.3°
0.69 mm
06-01
33.3° 22.9°
0.06 mm
06-02
35.5° 24.3°
06-03
30.2° 23.6°
0.25 mm
06-04
30.4° 24.0°
Both models agree
Avg diff: 2.1°C
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Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-05-29T14:47 UTC.