Sežana Weather in December
Sežana in December averages 8°C (46°F) during the day and 2°C (36°F) at night. This is part of the winter season, and quite a bit of rainfall is expected this month.
Rainfall in Sežana in December
Typically around 13 days of rainfall are expected, averaging 131 mm (5.2 in) for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.
Temperature in Sežana in December
December in Sežana sees highs of 8°C (46°F) and lows of 2°C (36°F) overnight. December is typically considered a winter month. Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. With lows around 2°C (36°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Sežana in December
This month sees fewer sunny days, with about 84 hours of sunshine, perfect for those who enjoy cooler temperatures.
Average water temperature in December
At 11°C (52°F), the water is too cold for most people to swim comfortably. A wetsuit is pretty much essential if you plan to go in.December in Sežana 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 Sežana's climate page.
Sežana Temperature in December
Min Temperature
2°C (36°F)
Max Temperature
8°C (46°F)
Water Temperature
11°C (52°F) *
Chance of Rain
42%
Precipitation
131 mm (5.2 in)
Rainy days
13 days
Humidity
67% *
Sunshine
84 hours *
Percentage Sunshine
31% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Sežana typically stay consistent throughout December, with daily highs averaging around 8°C (46°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 Sežana in December
Browse day-by-day weather records for Sežana spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Sežana historical weather extremes in December
According to our 49 years of weather records for Sežana, the following extremes were recorded between 1976 and 2025.
- The warmest day in December was on December 2, 2023, with a maximum of 17°C (63°F).
- The coldest December day was on December 28, 1996, with a maximum of -4°C (25°F).
- The lowest overnight temperature recorded in December was -10°C (14°F) (December 29, 1996).
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 →
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What to Wear in Sežana in December
Cold weather calls for smart layering in December. A thermal base layer makes a huge difference in staying warm. Add a wool sweater or fleece, then a wind-resistant outer jacket. Prepare for significant rainfall with proper waterproof clothing and shoes. With water temperatures around 11°C (52°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. With limited sunshine expected, sunglasses aren't a priority for packing.What To Do in Sežana 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 Sežana's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Sežana climate overview or explore weather in Slovenia.
