Last updated: March 2, 2024
The weather in San Ramon, Costa Rica, during December is characterized by an average temperature of 23°C (74°F). Highs can soar to 29°C (84°F), while lows may dip to 18°C (65°F). Typically, the humidity level in San Ramon throughout December hovers around 72%.
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Average temperature
Maximum temperature
Humidity
In December, San Ramon averages 72 mm (2.8 inches) of rainfall, typically over the course of 18 rainy days. The month enjoys an average of 11 hours 32 minutes of daylight, with the sun shining for approximately 9 hours 23 minutes each day. Additionally, there is a 56% probability of sunny days during this period.
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Chance of sun
In December, the UV Index in San Ramon 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 | 9 | 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 | ||||||