Koper
December
Weather in Koper for December 2025
Your guide to Koper weather in December - trends and predictions
In general, the average temperature in Koper at the beginning of December is 8.7 °C. As the month progressed, temperatures tended to moderately rise, reaching an average of 10.7 °C by the end of December.
Koper experiences moderate rainfall in December, with an average of 6 rainy days and a total precipitation of 32.3 mm.
Temperatures
Rain 🌧️
25
Dry days
6
Rainy days
0
Snow days
10°/3°
Temperatures
11 km/h
Avg max wind
79 %
Avg humidity
Koper in December average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  10° | 2  11° | 3  9° | 4  8° | 5 8° | 6  7° | 7 8° |
| 8  8° | 9 8° | 10 9° | 11 9° | 12 9° | 13 10° | 14 8° |
| 15 10° | 16 9° | 17 10° | 18 11° | 19 11° | 20 10° | 21 9° |
| 22 8° | 23 8° | 24 9° | 25 10° | 26 10° | 27 11° | 28 11° |
| 29 11° | 30 11° | 31 11° |
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Temperatures trend during December in Koper
See the weather trend as well as the moving average line
December weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. | Sunny | 10° /3° | 0 mm | 4 | |
| 2 Dec. | Partly cloudy | 11° /1° | 0 mm | 4 | |
| 3 Dec. | Overcast | 9° /1° | 0 mm | 2 | |
| 4 Dec. | Cloudy | 8° /2° | 0 mm | 2 | |
| 5 Dec. | Sunny | 8° /2° | 0 mm | 3 | |
| 6 Dec. | Patchy rain possible | 7° /0° | 0 mm | 2 | |
| 7 Dec. | Cloudy | 8° /0° | 0 mm | 2 | |
| 8 Dec. | Patchy light rain | 8° /3° | 2.4 mm | 2 | |
| 9 Dec. | Overcast | 8° /2° | 0.1 mm | 2 | |
| 10 Dec. | Light drizzle | 9° /1° | 1 mm | 2 | |
| 11 Dec. | Patchy rain possible | 9° /1° | 0.1 mm | 3 | |
| 12 Dec. | Patchy rain possible | 9° /2° | 0.1 mm | 3 | |
| 13 Dec. | Light rain shower | 10° /2° | 10.7 mm | 3 | |
| 14 Dec. | Light drizzle | 8° /3° | 1.2 mm | 2 | |
| 15 Dec. | Sunny | 10° /1° | 0 mm | 4 | |
| 16 Dec. | Sunny | 9° /0° | 0 mm | 3 | |
| 17 Dec. | Overcast | 10° /1° | 0 mm | 4 | |
| 18 Dec. | Sunny | 11° /2° | 0 mm | 3 | |
| 19 Dec. | Sunny | 11° /3° | 4.5 mm | 3 | |
| 20 Dec. | Overcast | 10° /2° | 9.9 mm | 3 | |
| 21 Dec. | Patchy rain possible | 9° /1° | 0 mm | 3 | |
| 22 Dec. | Partly cloudy | 8° /0° | 5.2 mm | 3 | |
| 23 Dec. | Partly cloudy | 8° /1° | 4.2 mm | 3 | |
| 24 Dec. | Sunny | 9° /2° | 0 mm | 3 | |
| 25 Dec. | Cloudy | 10° /2° | 0 mm | 3 | |
| 26 Dec. | Patchy rain possible | 10° /2° | 0.1 mm | 3 | |
| 27 Dec. | Patchy rain possible | 11° /2° | 0 mm | 4 | |
| 28 Dec. | Patchy rain possible | 11° /3° | 0.4 mm | 4 | |
| 29 Dec. | Patchy rain possible | 11° /4° | 0.5 mm | 4 | |
| 30 Dec. | Patchy rain possible | 11° /4° | 0.1 mm | 4 | |
| 31 Dec. | Light rain shower | 11° /4° | 2 mm | 4 | |
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Important Notice
Our weather forecast for Koper in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Koper forecast closer to your planned date for the most up-to-date weather information.
Koper in December - FAQ
What are the expected maximum and minimum temperatures in Koper during December?
Prepare for cooler days with highs just around 10° and colder nights, dipping below 3°.
How much rainfall should be expected in Koper during December?
In December, Koper can expect light to moderate rainfall, totaling 32.3 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Koper during December?
The average wind speed in Koper during December is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Koper
Explore the daily rainfall trends and prepare for Kopers December weather 💧
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