Piran Weather in December
Piran in December sees low temperatures, with highs around 11°C (52°F) and overnight lows of 7°C (45°F). Rainfall is fairly high at around 120 mm (4.7 in) on average, so pack waterproofs just in case.
Rainfall in Piran in December
Looking at the last 30 years, the data shows about 12 days with rain, averaging 120 mm (4.7 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Piran in December
In December, Piran sees low temperatures, with highs of 11°C (52°F). Nights drop to around 7°C (45°F). Winter occurs in December. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With lows around 7°C (45°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Piran in December
The month has fewer sunny days, with around 95 hours of sunshine.December in Piran has its charm, but if you're looking for destinations with pleasant temperatures and sunny skies, our weather planner can help you explore other options 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 Piran's climate page.
Piran Temperature in December
Min Temperature
7°C (45°F)
Max Temperature
11°C (52°F)
Chance of Rain
39%
Precipitation
120 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 Piran 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 Piran in December
Browse day-by-day weather records for Piran spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Piran historical weather extremes in December
The extremes listed below come from historical weather data collected in Piran from 1976 through 2025.
- Piran recorded its highest December temperature of 20°C (68°F) on 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
pleasant
tolerable
unpleasant
poor
What to Wear in Piran in December
Pack for changing conditions in Piran in December. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.What To Do in Piran 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 Piran's climate page.
Temperature Rainfall Sunshine Humidity
See the full Piran climate overview or explore weather in Slovenia.
