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Koper weather in December (Slovenia)

Planning a trip to Koper in December? This guide provides all the details you need.

In December, Koper generally has low temperatures and high rainfall. December is a winter month. Throughout the daytime, temperatures often hover around 10°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 4°C.

Koper in December usually receives high rainfall, averaging around 120 mm for the month. Rain is expected on roughly 12 days.

The city usually sees around 95 hours of sunlight, indicating fewer sunny days.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Koper. June, July and August typically offer the most agreeable circumstances. On the other hand, January, February and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Koper climate page with graphs.

 

Koper, monthly averages in December

Min TemperatureMin Temperature 4°C  
Max TemperatureMax Temperature 10°C  
Chance of RainChance of Rain 40%  
PrecipitationPrecipitation 120 mm  
Rainy daysRainy days 12 days  
HumidityHumidity 67% *  
SunshineSunshine 95 hours *  
Percentage SunshinePercentage Sunshine *  
* Data from: Portorož, Slovenia (11 KM, 7 Miles).

Where to go in Slovenia in December

Find out more about the weather in Slovenia in December and which places have the best weather conditions in this month.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Koper in December?

Wear a base layer in cold weather; this is the #1 thing you can do to increase your overall body temperature.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in December.

Swimming
4/10
Cycling
4/10
Walking
4/10
Camping
3/10
Outdoor sports
4/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Koper.

Our site offers climate and forecast data for every country in the world. Are you going to Slovenia? On this website you can find historical weather averages for many cities in Slovenia. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.