The highest day temperature in June 2025 was 71°F. The lowest night temperature was 48°F. The average values for day and night temperatures during June were 60.8°F и 52.7°F respectivly.

The average sea surface temperature in June 2025 for Helsinki was 54.3°F. The maximum and minimum values were 52.0°F and 56.4°F respectively.

Most of the days in June are sunny but you can also expect cloudy and gloomy days.

Precipitation total in June for Helsinki is 1.6 in. It makes june one of the least rainy months of the year.

The average wind speed in June is 9.2 mph. It makes June one of the most windless months of the year for Helsinki.

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 Helsinki in June is 12.1 hours.