The highest day temperature in June 2025 was 84°F. The lowest night temperature was 44°F. The average values for day and night temperatures during June were 60.0°F и 49.2°F respectivly.

The average sea surface temperature in June 2025 for Seinajoki was 54.1°F. The maximum and minimum values were 46.8°F and 59.2°F respectively.

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

Precipitation total in June for Seinajoki is 2.0 in. It makes june one of the most rainy months of the year.

The average wind speed in June is 7.3 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 June is 11.3 hours.