Koper weather in December (Slovenia)

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

Temperatures

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.

Precipitation

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

Average sunshine

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 Temperature 4°C  

Max Temperature 10°C  

Chance of Rain 40%  

Precipitation 120 mm  

Rainy days 12 days  

Humidity 67% *  

Sunshine 95 hours *  

Percentage Sunshine *  

* Data from: Portorož, Slovenia (11 KM, 7 Miles).

Where to go in Slovenia in December

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

Weather conditions Weather

Temperatures

Precipitation

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 this month?

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.

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

3/10

Outdoor sports

4/10

Interested in more climate information?

This site 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 travel conditions. Find out where to go with our weather planner.