ZIP code · Port Arthur · Texas · United States
ZIP code 77641 — Port Arthur
ZIP code 77641 serves Port Arthur, Texas.
- Postal code
- 77641Single source Value from one source, not cross-checked.
- City
- Port Arthur
- County
- Jefferson
- State
- Texas
- Country
- United States
- Coordinates
- 29.8476, -94.1297 — precision precise (locality)
View on OpenStreetMap - USDA hardiness zone
- 9b (25 to 30 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
- Area code
- 409Telephone area codes serving this ZIP (NANPA central-office assignments). A ZIP and an area code are different boundaries; at a border both codes may apply.
Tools: compare 77641 with another ZIP · ZIPs within 25 miles · distance from 77641
Climate — monthly normals
Warmest month Aug (avg high 93°F), coldest Jan (avg low 44°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 64 | 67 | 73 | 79 | 86 | 91 | 93 | 93 | 90 | 82 | 72 | 66 |
| Avg low °F | 44 | 48 | 53 | 60 | 67 | 73 | 75 | 74 | 71 | 61 | 52 | 46 |
| Precip in | 5.3 | 3.1 | 3.6 | 3.9 | 4.7 | 6.7 | 6.8 | 6.9 | 6.7 | 5.5 | 3.9 | 5.0 |
NOAA 1991–2020 climate normals from the nearest station: PORT ARTHUR SE TX AP (9.6 mi) · NOAA NCEI
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page