The highest day temperature in January 2025 was 57°F. The lowest night temperature was 26°F. The average values for day and night temperatures during January were 47.7°F и 36.6°F respectivly.

The average sea surface temperature in January 2025 for Koper was 50.2°F. The maximum and minimum values were 48.8°F and 51.6°F respectively.

You can expect various weather conditions during January. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in January for Koper is 2.5 in. It makes january the least rainy month of the year.

The average wind speed in January is 5.6 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Koper in January is 4.9 hours.