Last updated: March 2, 2024
The weather in Yosemite Valley, United States, during December is characterized by an average temperature of -3°C (27°F). Highs can soar to 10°C (50°F), while lows may dip to -15°C (5°F). Typically, the humidity level in Yosemite Valley throughout December hovers around 79%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Yosemite Valley averages 160 mm (6.3 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 9 hours 34 minutes of daylight, with the sun shining for approximately 6 hours 45 minutes each day. Additionally, there is a 40% probability of sunny days during this period.
Precipitation
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Chance of sun
In December, the UV Index in Yosemite Valley reaches a maximum of 4, indicating a level of Moderate exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 30 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 | 1 | 2 | 3 | 3 | 4 | 3 | 2 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||