Air Quality in Port Arthur, United States
Drizzle
32.6°C · 61.5% humidity
32.6°
Feels 38.5°
67
Moderate
Unusually sensitive people should consider reducing prolonged outdoor exertion.
2 stations
Nearby Monitoring Stations
Port Arthur's air quality — share it
AQI Forecast
54
12pm
54
54
67
3pm
63
73
71
6pm
69
68
56
9pm
55
55
55
12am
54
54
54
3am
54
54
54
6am
54
54
54
9am
54
54
Air Quality Index Trend
35h · 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 1.3× the WHO 24-hour guideline of 15 µg/m³.
61.5%
Humidity
48.9 km/h
Wind SW
1007.2 hPa
Pressure
24.9
UV Extreme
GoodModerateUSGUnhealthyVery UnhealthyHazardous
Which pollutant is driving the AQI?
PM2.5▲
19.95 µg/m³
PM10
41.15 µg/m³
050100150200300500
What is the weather forecast for Port Arthur?
Temperature & Precipitation
PM2.5 Trend
35h · 1 stationPM2.519.95 µg/m³
×1.3 WHO
Moderate
PM1041.15 µg/m³
Good
UV INDEX24.9
Extreme
Station readings (2 stations within 25 km)
19.95
Median
19.95
Average
18.8
Low
21.1
High
PM2.5 µg/m³ · Model: 13.5 · Bias: -6.4
What is the 7-day forecast for Port Arthur?
07-21
32.6° 24.0°
14.87 mm
07-22
30.1° 24.6°
64.44 mm
07-23
35.0° 21.3°
33.25 mm
07-24
31.2° 24.5°
4.69 mm
07-25
34.8° 23.8°
1.37 mm
07-26
35.4° 26.2°
07-27
31.4° 26.6°
Both models agree
Avg diff: 2.3°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 2026-07-21T20:49 UTC.