Weather in Vaasa in August 2025
Average weather
Average temperature in Vaasa in August
Going from a maximum of +30°C during the day to a minimum of +8°C during the night, the temperature in August averages around +20°C.
The average maximum temperature goes down 18% by the end of the month, compared with the beginning of the month, from +20°C to +16°C.
Is Vaasa warm or cold in August?
Vaasa is typically mild in August.
Maximum temperatures go down compared to the previous month from +20°C to +18°C. The minimum temperature also goes down from +12°C to +11°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
August is one of the warmest months in Vaasa, here is the comparison with other months:
Water temperature in Vaasa in August
Water in Vaasa in August is Fresh. It varies from +14°C to +19°C, with an average of +17°C. This is almost similar to the air temperature, which averages +18°C.
The water temperature in August is one of the warmest of the entire year:
Can you swim in Vaasa in August?
Climate in Vaasa in August
| July | August | September | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +20°C | +18°C | +13°C | ||||
| Min. temperature | ||||||
| +5°C | +2°C | -3°C | ||||
| Max. temperature | ||||||
| +32°C | +30°C | +25°C | ||||
| Rainfall | ||||||
| 74 mm | 82 mm | 69 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Avg. water temperature | ||||||
| +16°C | +17°C | +13°C | ||||
| Humidity | ||||||
| 74% | 78% | 82% | ||||
| Air pressure | ||||||
| 1010 HPa | 1010 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 6 | 5 | 4 | ||||
| Cloudy days | ||||||
| 8 | 8 | 10 | ||||
| Rainy days | ||||||
| 16 | 17 | 16 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
August typically has worse weather conditions compared to July. It’s getting colder in August. From +20°C in the day, the average maximum temperature lowers to +18°C. Prepare for more rain. Average rainfall goes from 74 mm to 82 mm. Humidity rises from 74% to 78%. The average wind speed doesn’t change much during August, staying around 2 m/s. The days becoming less sunny, going from 6 sunny days in July to 5 in August.
September brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Vaasa is gradually increasing during August, going from 3 m/s to 4 m/s over the course of the month.
Rain
How was the weather last August in Vaasa?
Climate Change over Years
The climate in Vaasa in August has not changed much over the last 43 years.
The average temperature was the lowest in 1985 (+4°C) and the highest in 2020 (+10°C). The driest year was 2002 with only 260 mm of rainfall, and the wettest year was 2019 with 2226 mm.
FAQ
Is August a good time to visit Vaasa?
Can you sunbathe in Vaasa in August?
Can you swim in Vaasa in August?
Is Vaasa rainy in August?
Is it sunny in Vaasa in August?
Other cities in Finland
Monthly weather in Vaasa
Source of the data
For this page, we’ve looked at the typical weather in Vaasa, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.