May weather forecast
Vaasa, Finland

May sees a pleasing incline in warmth, bringing temperatures as high as 13°C (55.4°F). A clear departure from the dwindling cold of April, May is the bookmark between spring and the coming summer. The steady increment in daylight hours, combined with a rise in sea temperatures, is an open invitation for water activities. The weather starts to stabilize with decreased variance between days. As May bids adieu, residents look forward to the much-anticipated Nordic summer with fervent excitement.

Temperature

May's arrival in Vaasa, Finland, signals a distinct temperature shift, escalating from an icy 5°C (41°F) in April to a refreshing 13°C (55.4°F). Throughout May, Vaasa's nights cool down to an average of 4°C (39.2°F).

Rainfall

In Vaasa, in May, it is raining for 11 days, with typically 32mm (1.26") of accumulated precipitation. Throughout the year, in Vaasa, there are 182 rainfall days, and 493mm (19.41") of precipitation is accumulated.

Sea temperature

In Vaasa, in May, the average water temperature is 3.9°C (39°F).
Note: In the practice of swimming, this situation poses immediate risks to life. Losing control over breathing is immediate, thereby making clear thinking near impossible. A specialized swimsuit is obligatory to restrict thermal loss.

Daylight

In Vaasa, the average length of the day in May is 18h and 6min.
On the first day of the month, sunrise is at 05:10 and sunset at 21:50. On the last day of May, sunrise is at 03:46 and sunset at 23:16 EEST.

Sunshine

In May, the average sunshine in Vaasa is 7h.

UV index

In May, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.
Note: A typical high UV index of 3 in May suggests the following recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.