The highest day temperature in January 2025 was 44°F. The lowest night temperature was 4°F. The average values for day and night temperatures during January were 24.2°F и 22.5°F respectivly.

The average sea surface temperature in January 2025 for Seinajoki was 28.5°F. The maximum and minimum values were 26.0°F and 31.4°F respectively.

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

Precipitation total in January for Seinajoki is 1.4 in.

The average wind speed in January is 7.7 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 Seinajoki in January is 1.7 hours.