Port Arthur, Texas Weather
Cicadas claim the scorching afternoon. Day 14 of summer. Read this microseason across nine climate regions →
Port Arthur weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 4Overcast29%—93°80°—
- SundayJul 5Overcast23%—93°78°0°
- MondayJul 6Thunderstorm47%—93°78°0°
- TuesdayJul 7Thunderstorm39%—94°77°+1°
- WednesdayJul 8Thunderstorm11%—92°77°-2°
- ThursdayJul 9Clear——94°79°+2°
- FridayJul 10Clear——93°79°-1°
AQI 52 (Moderate), driven by PM2.5. AQI down 8 over the last 6 hours (gradual decline). PM2.5 at 9.9 µg/m³ (AQI 52) with a 0.77 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 30 now. With UV 4.8 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 14 around 1 PM.
- Present
- AQI 30
- UV peak
- 4.8 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 14
PM × Wind × Precip
PM2.5 at 9.9 µg/m³ (AQI 52) with a 0.77 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.77
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 10:57 PM
- Moonset
- 10:32 AM
- In sign
- ♓︎ Pisces
Cicadas claim the scorching afternoon
Port Arthur at a glance
- Today vs. normal: 6°F above the seasonal normal for this latitude
- Last frost: February 14 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 77640, 77642
16-Day Forecast — Port Arthur
- Sat93°80°29%
- Sun93°78°23%
- Mon93°78°47%
- Tue94°77°39%
- Wed92°77°11%
- Thu94°79°5%
- Fri93°79°8%
- Sat95°79°13%
- Sun94°79°18%
- Mon97°77°20%
- Tue98°77°14%
- Wed89°80°26%
- Thu81°71°32%
- Fri81°74°31%
- Sat88°76°27%
- Sun92°77°29%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Port Arthur
Right now in the garden
Peak growing season
As of July 4, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
SPC Convective Outlook
Storm Prediction Center — Port Arthur
SPC includes Port Arthur in the general thunderstorm area today — no severe risk, but storms are possible.
- TODAYTSTMGeneral Thunderstorms
- TOMORROWTSTMGeneral Thunderstorms
- DAY 3TSTMGeneral Thunderstorms
Thunderstorms possible. Not severe, but capable of producing lightning and brief heavy rain.
Source: NOAA / NWS Storm Prediction Center categorical convective outlook. Outlooks are re-issued multiple times per day; this page reflects the most recent SPC polygons covering the city’s coordinates.
ZIP codes in Port Arthur
- 77655
- 77640
- 77642
- 77641
- 77643