The highest day temperature in January 2026 was 32°F. The lowest night temperature was -5°F. The average values for day and night temperatures during January were 17.4°F и 16.3°F respectivly.

The average sea surface temperature in January 2026 for Porvoo was 30.2°F. The maximum and minimum values were 26.8°F and 34.2°F respectively.

Most of the days in January are gloomy but you can also expect sunny days.

Precipitation total in January for Porvoo is 2.0 in.

The average wind speed in January is 13.3 mph. It makes January one of the most windy months of the year for Porvoo.

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 Porvoo in January is 1.7 hours.