Last updated: March 2, 2024
The weather in San Jose, Costa Rica, during December is characterized by an average temperature of 24°C (75°F). Highs can soar to 27°C (81°F), while lows may dip to 21°C (70°F). Typically, the humidity level in San Jose throughout December hovers around 70%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, San Jose averages 212 mm (8.3 inches) of rainfall, typically over the course of 27 rainy days. The month enjoys an average of 11 hours 28 minutes of daylight, with the sun shining for approximately 10 hours 15 minutes each day. Additionally, there is a 42% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in San Jose reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 15 minutes.
| 07:00 | 08:00 | 09:00 | 10:00 | 11:00 | 12:00 | 13:00 | 14:00 | 15:00 | 16:00 | 17:00 | 18:00 | 19:00 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UVI | 1 | 3 | 6 | 8 | 10 | 10 | 8 | 6 | 3 | 1 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 25 min | 30 min | 45 min | ||||||