Daytime highs, nighttime lows and the warmest cities in Southern Finland, Finland this September.
Southern Finland, Finland, a region in Finland, typically experiences mild weather in September, with maximum daytime temperatures around 16°C (61°F) and nighttime temperatures around 8°C (46°F) in Helsinki.
Discover the typical September temperatures for the most popular locations of Southern Finland on the map below. Detailed insights are just a click away.
Check the conditions for any month of the year.
Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Southern Finland.
Marker color shows the average daytime high temperature in September: blue is cold, red is hot.
Helsinki averages a daytime high of 16°C (61°F) in September, which is moderate for Southern Finland, Finland.
Helsinki sees nighttime lows close to 8°C (46°F) in September.
Most areas experience a moderate amount of sunshine, with approximately 151 hours of sunlight expected in Helsinki. This makes it neither too gloomy nor overly bright.
The water temperature averages approximately 13°C (55°F) in Helsinki this month, generally too cold for comfortable swimming.
We have much more information about the climate in Southern Finland.
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.
Need travel inspiration? Check out our bucket list articles and be inspired.
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