Climate almanac
Port Isabel
Texas, United States · 26.07°, -97.21°
What is the weather like in Port Isabel in September?
In September, Port Isabel is typically 84°F (29°C) during the day and 80°F (27°C) at night. The month brings about 5.6 in (143 mm) of precipitation in total.
- Average high84°F (29°C)
- Average low80°F (27°C)
- Precipitation5.6 in (143 mm)
- Clear or mostly clear days14
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)