The highest day temperature in July 2025 was 79°F. The lowest night temperature was 51°F. The average values for day and night temperatures during July were 72.2°F и 62.1°F respectivly.

The average sea surface temperature in July 2025 for Helsinki was 64.6°F. The maximum and minimum values were 54.4°F and 77.2°F respectively.

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

Precipitation total in July for Helsinki is 1.9 in.

The average wind speed in July is 9.0 mph. It makes July 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 July is 11.4 hours.