The highest day temperature in July 2025 was 73°F. The lowest night temperature was 53°F. The average values for day and night temperatures during July were 67.3°F и 62.8°F respectivly.

The average sea surface temperature in July 2025 for Porvoo was 66.2°F. The maximum and minimum values were 56.2°F and 76.4°F respectively.

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

Precipitation total in July for Porvoo is 1.9 in.

The average wind speed in July is 10.6 mph. It makes July one of the most windless 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 July is 11.5 hours.