Last updated: March 2, 2024
The weather in San Francisco, Peru, during December is characterized by an average temperature of 16°C (62°F). Highs can soar to 24°C (75°F), while lows may dip to 11°C (53°F). Typically, the humidity level in San Francisco throughout December hovers around 89%.
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Average temperature
Maximum temperature
Humidity
In December, San Francisco averages 325 mm (12.8 inches) of rainfall, typically over the course of 26 rainy days. The month enjoys an average of 12 hours 50 minutes of daylight, with the sun shining for approximately 8 hours 19 minutes each day. Additionally, there is a 11% probability of sunny days during this period.
Precipitation
Rainy days
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Chance of sun
In December, the UV Index in San Francisco reaches a maximum of 16, indicating a level of Extreme exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, during which unprotected skin may burn in as little as 10 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 | 2 | 5 | 9 | 13 | 16 | 16 | 15 | 11 | 7 | 3 | 1 | 1 | 0 |
| Exposure | Low | Moderate | VeryHigh | Extreme | High | Moderate | Low | ||||||
| Time to burn | 45 min | 30 min | 15 min | 10 min | 25 min | 30 min | 45 min | ||||||