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Southern Finland Finland
Temperatures in September
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Temperature in Southern Finland in September

Southern Finland is a region in Finland. September is generally a mild month with maximum daytime temperatures around 16°C and nighttime temperatures around 8°C in Helsinki.

What is the temperature of the different cities in Southern Finland in September?

Discover the typical September temperatures for the most popular locations of Southern Finland on the map below. Detailed insights are just a click away.

Weather conditions Weather
Temperatures
Precipitation
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Legend very warm warm pleasant moderate cold very cold
Very warm means maximum temperatures above 30°C. Warm: 22°C to 30°C. Pleasant: 18°C to 22°C Moderate: 12°C to 18°C. Cold: 2°C to 12°C. Very cold: lower than 2°C

  • How much sun does Southern Finland get in September?
    • Most cities enjoy a balanced amount of sunshine, with around 151 hours of sunlight anticipated in Helsinki. This ensures the days are neither too dim nor excessively sunny.

  • What is the water's temperature in September?
    • The water temperature averages approximately 13°C in Helsinki this month, so not the best month to swim.

    Interested in more climate information?

    We have much more information about the climate in Southern Finland. Interested in the weather conditions in a specific month? Select the month below.

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    • Weather and climate has detailed information for every country in the world. Are you going to Finland? Get detailed historical weather averages for many cities in Finland.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.