Last updated: March 2, 2024
The weather in San Juan Ostuncalco, Guatemala, during December is characterized by an average temperature of 20°C (68°F). Highs can soar to 25°C (78°F), while lows may dip to 13°C (56°F). Typically, the humidity level in San Juan Ostuncalco throughout December hovers around 76%.
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In December, San Juan Ostuncalco averages 71 mm (2.8 inches) of rainfall, typically over the course of 19 rainy days. The month enjoys an average of 11 hours 15 minutes of daylight, with the sun shining for approximately 10 hours 8 minutes each day. Additionally, there is a 65% probability of sunny days during this period.
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In December, the UV Index in San Juan Ostuncalco reaches a maximum of 9, 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 | 2 | 4 | 7 | 9 | 9 | 9 | 6 | 4 | 2 | 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 | ||||||