Climate almanac
San Isidro
San José, Costa Rica · 9.37°, -83.70°
What is the climate like in San Isidro?
The best time to visit San Isidro is typically February, the year's most comfortable month (6.5/10). San Isidro is warmest in May, when daily highs average 77°F (25°C), and coolest in December, when lows fall to about 68°F (20°C). The wettest month is typically October and the driest is February; the year sees roughly 271 in (6884 mm) of precipitation.
- Best time to visitFebruary — the year's comfort peak (6.5/10)
- Warmest monthMay — average high 77°F (25°C)
- Coolest monthDecember — average low 68°F (20°C)
- Wettest monthOctober (41 in (1046 mm))
- Driest monthFebruary (4.8 in (122 mm))
- Annual precipitation271 in (6884 mm)
- Based on2016-2025 daily ERA5 reanalysis data (10-year normals)
- Records fromJuan Santamaria Intl, 90 km away (1973-2025)