Porvoo Weather & Climate: Best Time to Visit

Depending on the time of the year, temperatures range from comfortable to very cold in Porvoo. Average maximum daytime temperatures range from a comfortable 23°C (73°F) in July, the warmest time of the year, to a very cold -1°C (30°F) during cooler months like February.

At night, you can expect temperatures ranging from 14°C (57°F) in July to around -8°C (18°F) during February.

Check out our detailed temperature page for more information.

Temperature ranges by month

Generally, Porvoo has a moderate amount of precipitation, averaging 702 mm (28 in) of rain/snowfall annually. While rainfall varies throughout the year, each season offers its own charm. June brings wetter days averaging 76 mm (3 in) of precipitation, spread over 11 rainy days.

In contrast, the driest month March experiences a drier climate, with about 41 mm (1.6 in) of snow/rainfall spread across 14 snowy/rainy days. For more details, please visit our Porvoo Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Porvoo. While June receives considerable daily sunshine with up to 9.9 hours, December marks the darkest time of the year, where sunshine is scarce with only 1 hour of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

The relative humidity is high throughout the year in Porvoo.

The city experiences its highest humidity in November, reaching 89%. In May, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year