Last updated: March 2, 2024
The weather in Portoroz, Slovenia, during December is characterized by an average temperature of 10°C (50°F). Highs can soar to 14°C (58°F), while lows may dip to 5°C (41°F). Typically, the humidity level in Portoroz throughout December hovers around 88%.
Minimum temperature
Average temperature
Maximum temperature
Humidity
In December, Portoroz averages 150 mm (5.9 inches) of rainfall, typically over the course of 13 rainy days. The month enjoys an average of 8 hours 45 minutes of daylight, with the sun shining for approximately 6 hours 40 minutes each day. Additionally, there is a 36% probability of sunny days during this period.
Precipitation
Rainy days
Sunshine hours
Chance of sun
In December, the UV Index in Portoroz reaches a maximum of 2, indicating a level of Low exposure. The most intense UV radiation typically occurs between 11:00 and 13:00, 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 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Exposure | Low | ||||||||||||
| Time to burn | 45 min | ||||||||||||