Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Koper, Slovenia

  • Average sea temperature in December: 13.2°C

Best months for swimming (with the highest average sea temperature) are July and August (24.8°C).
The coldest month (with the lowest average sea temperature) is February (9.3°C).

  • Average daylight in December: 9.9h

The month with the longest days is June (Average daylight: 16.9h).
The month with shortest days is December (Average daylight: 9.9h).