Climate almanac
San Juan
Loreto, Peru · -3.78°, -73.28°
What is the weather like in San Juan in September?
In September, San Juan is typically 88°F (31°C) during the day and 74°F (23°C) at night. The month brings about 6.1 in (156 mm) of precipitation in total.
- Average high88°F (31°C)
- Average low74°F (23°C)
- Precipitation6.1 in (156 mm)
- Clear or mostly clear days3
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)