Port Arthur, TX Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Arthur, a city in Jefferson County, Texas.
Overnight
66°F
Partly Cloudy
Partly cloudy, with a low around 66. North wind around 15 mph.
7-day forecast for Port Arthur
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 66°F | Partly Cloudy | 15 mph N | 1% |
| Wednesday | 75°F | Sunny | 0 to 15 mph N | 0% |
| Wednesday Night | 64°F | Clear | 5 mph NE | 0% |
| Thursday | 77°F | Sunny | 0 to 5 mph E | 4% |
| Thursday Night | 67°F | Partly Cloudy | 0 to 5 mph W | 9% |
| Friday | 77°F | Mostly Sunny | 5 mph N | 2% |
| Friday Night | 65°F | Partly Cloudy | 5 to 15 mph NE | 5% |
| Saturday | 72°F | Partly Sunny | 10 to 15 mph NE | 0% |
| Saturday Night | 59°F | Mostly Cloudy | 10 to 15 mph NE | 8% |
| Sunday | 65°F | Mostly Sunny | 10 to 15 mph N | 9% |
| Sunday Night | 56°F | Partly Cloudy | 10 mph N | 4% |
| Monday | 67°F | Sunny | 5 to 10 mph NE | 8% |
| Monday Night | 57°F | Mostly Clear | 5 mph NE | 1% |
| Tuesday | 70°F | Sunny | 0 to 5 mph E | 2% |
Forecast source: National Weather Service (api.weather.gov) for Port Arthur (29.900, -93.894). Updated through the day.
Growing snapshot for Port Arthur
Last spring frost
Feb 14
First fall frost
Dec 7
Growing season
301 days
Hardiness zone
9b
More local growing data for Port Arthur: nearby ZIP 77640 weather · frost dates · planting calendar · Texas frost dates
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Port Neches
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Taylor Landing
Climate data from the nearest NOAA station, Port Arthur Se Tx Ap, Tx (6.8 mi from Port Arthur). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.