Last updated: March 2, 2024
The weather in Mount Washington, United States, during December is characterized by an average temperature of 5°C (42°F). Highs can soar to 20°C (68°F), while lows may dip to -8°C (18°F). Typically, the humidity level in Mount Washington throughout December hovers around 88%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Mount Washington averages 115 mm (4.5 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 9 hours 33 minutes of daylight, with the sun shining for approximately 5 hours 34 minutes each day. Additionally, there is a 38% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in Mount Washington reaches a maximum of 3, 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 | 0 | 1 | 1 | 2 | 2 | 3 | 3 | 2 | 1 | 1 | 1 | 0 | 0 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||