Climate almanac
San Isidro
San José, Costa Rica · 9.37°, -83.70°
What is the weather like in San Isidro in September?
In September, San Isidro is typically 76°F (24°C) during the day and 70°F (21°C) at night. The month brings about 30 in (767 mm) of precipitation in total.
- Average high76°F (24°C)
- Average low70°F (21°C)
- Precipitation30 in (767 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)