January weather forecast
Koper, Slovenia

Weather in January

Sea temperature

In January, the average sea temperature in Koper, Slovenia, is 10.3°C (50.5°F).
Note: Swimming in 10.3°C (50.5°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

The average length of the day in January in Koper is 9h and 10min.
On the first day of the month, sunrise is at 07:45 and sunset at 16:32. On the last day of January, sunrise is at 07:27 and sunset at 17:09 CET.
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FAQ

What is the sea water temperature in January in Koper?

In January, the average sea temperature is 10.3°C (50.5°F). Swimming in 10.3°C (50.5°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

What is the average length of the day in January in Koper?

In January, the average day length in Koper is 9h and 10min.

What time are sunrise and sunset in January in Koper?

In January, on the first day of the month, sunrise is at 07:45 and sunset at 16:32. On the last day of the month, sunrise is at 07:27 and sunset at 17:09 CET.

Average sea temperature in January
Koper, Slovenia

Average sea temperature in January - Koper, Slovenia
  • Average sea temperature in January: 10.3°C

The 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).

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Average daylight in January
Koper, Slovenia

Average daylight in January - Koper, Slovenia
  • Average daylight in January: 9h and 10min

The month with the longest days is June (Average daylight: 15h and 38min).
The month with the shortest days is December (Average daylight: 8h and 46min).

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