Climate almanac
San Isidro
San José, Costa Rica · 9.37°, -83.70°
What is the weather like in San Isidro in December?
In December, San Isidro is typically 75°F (24°C) during the day and 68°F (20°C) at night. The month brings about 14 in (363 mm) of precipitation in total.
- Average high75°F (24°C)
- Average low68°F (20°C)
- Precipitation14 in (363 mm)
- Clear or mostly clear days7
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)