The highest day temperature in April 2025 was 40°F. The lowest night temperature was 24°F. The average values for day and night temperatures during April were 34.3°F и 33.1°F respectivly.

The average sea surface temperature in April 2025 for Vaasa was 35.4°F. The maximum and minimum values were 30.4°F and 40.6°F respectively.

Most of the days in April are gloomy but you can also expect sunny days.

Precipitation total in April for Vaasa is 1.4 in. It makes april one of the least rainy months of the year.

The average wind speed in April is 10.3 mph. It makes April one of the most windless months of the year for Vaasa.

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 Vaasa in April is 6.8 hours.