Cool
Average highs are around 17°C, so pack for cooler days.
Weather Guide
Kvarken Archipelago, Finland Average Monthly Weather
Weather score27Poor annual avg
Best months: July, June, August
Across the year, average daytime temperatures are around 7°C, sunshine averages 3.7h per day, and rainfall totals about 484mm. Sea temperatures average 6°C across the year.
Annual weather
Annual averages
Temp
7°C
Rain
484mm
Annual total
Sun
3.7h
Sea
6°C
Weather score
27
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 59mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.7h per day, enough for a balanced month.
Cool sea
Sea temperatures average 16°C, so the water can feel cool.
Map
Weather map
Compare Kvarken Archipelago, Finland with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August17°C average high
August is one of Kvarken Archipelago's hottest months, so shade and slower afternoons matter.
Warmest monthsJune to August
This stretch sets the upper range for average daytime heat.
Rain
August59mm average rain
August is one of Kvarken Archipelago's wettest months, so rain is likely to be a major planning factor.
Driest monthsJanuary to July and October to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August5.7 hours average sun
August sits close to Kvarken Archipelago's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to July
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August16°C average sea
August is one of Kvarken Archipelago's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 15°C in this stretch, so swimming comfort is at its strongest.
Weather score
August37 weather score
August sits close to Kvarken Archipelago's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to July
These months have the strongest weather score in the monthly averages.
