Climate almanac
La Unión
La Union, El Salvador · 13.34°, -87.84°
What is the weather like in La Unión in September?
In September, La Unión is typically 85°F (29°C) during the day and 79°F (26°C) at night. The month brings about 13 in (329 mm) of precipitation in total.
- Average high85°F (29°C)
- Average low79°F (26°C)
- Precipitation13 in (329 mm)
- Clear or mostly clear days2
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)