Last updated: March 2, 2024
The weather in Penryn, United States, during December is characterized by an average temperature of 9°C (48°F). Highs can soar to 20°C (68°F), while lows may dip to -1°C (31°F). Typically, the humidity level in Penryn throughout December hovers around 83%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Penryn averages 129 mm (5.1 inches) of rainfall, typically over the course of 10 rainy days. The month enjoys an average of 9 hours 29 minutes of daylight, with the sun shining for approximately 6 hours 5 minutes each day. Additionally, there is a 35% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in Penryn 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 | 2 | 2 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | Moderate | Low | ||||||||||
| Time to burn | 45 min | 30 min | 45 min | ||||||||||