Last updated: March 2, 2024
The weather in Joint Base Lewis McChord, United States, during December is characterized by an average temperature of 5°C (41°F). Highs can soar to 12°C (55°F), while lows may dip to -4°C (25°F). Typically, the humidity level in Joint Base Lewis McChord throughout December hovers around 87%.
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Average temperature
Maximum temperature
Humidity
In December, Joint Base Lewis McChord averages 201 mm (7.9 inches) of rainfall, typically over the course of 19 rainy days. The month enjoys an average of 8 hours 33 minutes of daylight, with the sun shining for approximately 2 hours 58 minutes each day. Additionally, there is a 11% probability of sunny days during this period.
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Chance of sun
In December, the UV Index in Joint Base Lewis McChord reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 45 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 | 0 | 1 | 1 | 1 | 1 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | ||||||||||||
| Time to burn | 45 min | ||||||||||||