Last updated: March 2, 2024
The weather in Santiago, Costa Rica, during December is characterized by an average temperature of 21°C (71°F). Highs can soar to 26°C (79°F), while lows may dip to 17°C (63°F). Typically, the humidity level in Santiago throughout December hovers around 72%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Santiago averages 253 mm (10.0 inches) of rainfall, typically over the course of 28 rainy days. The month enjoys an average of 11 hours 32 minutes of daylight, with the sun shining for approximately 9 hours 35 minutes each day. Additionally, there is a 40% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In December, the UV Index in Santiago 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 | 5 | 3 | 1 | 1 | 0 | 0 |
| Exposure | Low | Moderate | High | VeryHigh | Moderate | Low | |||||||
| Time to burn | 45 min | 30 min | 25 min | 15 min | 30 min | 45 min | |||||||