Next 24 hours

US AQI

43Now
43
43
421 AM
41
40
394 AM
37
37
377 AM
37
37
3610 AM
35
37
381 PM
39
40
414 PM
41
41
407 PM
39
39

Air quality outlook

Worst hour each day

Today43Good
Sat 1743Good
Sun 1859Moderate
Mon 1984Moderate
Tue 2094Moderate

From our air-quality forecast models (GEOS-CF / GEFS aerosols). AQI uses the US EPA scale.

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About Port Arthur weather

Port Arthur is in Jefferson County, Texas, United States at 29.89°, -93.94°. Right now it’s 68° and windy; today’s high is 80° with a 1% chance of rain.

Texas encompasses a vast range of climates due to its enormous size, from humid subtropical conditions along the Gulf Coast to arid desert in the west, and from semi-tropical in the Rio Grande Valley to continental on the northern plains. The state is so large that it spans multiple climate zones, with annual rainfall ranging from over 55 inches in the east to less than 10 inches in far west Texas near El Paso.