The highest day temperature in January 2025 was 53°F. The lowest night temperature was 24°F. The average values for day and night temperatures during January were 44.5°F и 37.2°F respectivly.

The average sea surface temperature in January 2025 for Opatija was 53.9°F. The maximum and minimum values were 52.2°F and 55.8°F respectively.

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

Precipitation total in January for Opatija is 3.7 in.

The average wind speed in January is 7.7 mph. It makes January one of the most windy months of the year for Opatija.

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 Opatija in January is 4.8 hours.