Portorož Weather in December
Portorož in December averages 11°C (52°F) during the day and 6°C (43°F) at night. This is part of the winter season, and quite a bit of rainfall is expected this month.
Rainfall in Portorož in December
Rain is expected on roughly 12 days, totalling around 119 mm (4.7 in) for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Portorož in December
Portorož in December gets highs of 11°C (52°F) during the day and drops to 6°C (43°F) at night. December marks the winter season. It stays cool throughout the day, so warm layers are a good idea from morning to evening. With overnight lows of 6°C (43°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets.
Sunshine in Portorož in December
The city usually sees around 95 hours of sunlight, indicating fewer sunny days.December in Portorož has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Portorož's climate page.
Portorož Temperature in December
Min Temperature
6°C (43°F)
Max Temperature
11°C (52°F)
Chance of Rain
39%
Precipitation
119 mm (4.7 in)
Rainy days
12 days
Humidity
67%
Sunshine
95 hours
Percentage Sunshine
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Portorož typically stay consistent throughout December, with daily highs averaging around 11°C (52°F). Nights are cold, with lows typically ranging from 1°C (34°F) to 4°C (39°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Portorož in December
Browse day-by-day weather records for Portorož spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Portorož historical weather extremes in December
Based on 49 years of weather observations in Portorož between 1976 and 2025, these are the recorded extremes.
- The hottest December day on record in Portorož reached 20°C (68°F) (December 19, 1989).
- Nighttime temperatures dropped to -10°C (14°F) on December 29, 1996, marking the coldest December night on record.
Best Places in Slovenia in December
Find out more about the weather in Slovenia and which places have the best travel conditions in this month. See all of Slovenia in December →
perfect weather
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What to Wear in Portorož in December
The weather can be unpredictable in December, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Portorož in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Slovenia, check out our Portorož's climate page.
Temperature Rainfall Sunshine Humidity
See the full Portorož climate overview or explore weather in Slovenia.
