Helsinki weather in September (Southern Finland, Finland)
Curious about the September weather in Helsinki? Here's what the weather might have in store during this month.
In September, Helsinki generally has moderate temperatures and moderate rainfall. Throughout the day, temperatures typically settle at around 16°C. But by evening, they drop to around 8°C.
Helsinki in September usually receives moderate rainfall, averaging around 64 mm for the month. Typically around 17 days of rainfall is expected.
The city usually sees around 151 hours of sunlight, indicating a moderately sunny period.
If you prefer dry days with pleasant temperatures, June, July and August typically offer the best circumstances. While January, February, March, April, October, November and December tend to showcase less optimal conditions.
For an in-depth look at the yearly conditions, visit our specialized Helsinki climate page with graphs.
Helsinki, monthly averages in September
Where to go in Finland in September
Find out more about the weather in Finland in September and which places have the best weather conditions in this month.
So, what should you wear in Helsinki in September?
For visitors traveling to Helsinki, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes. With a water temperature of around 13°C there is no need to bring your swimwear.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do in September.
Interested in more climate information?
Weather and Climate provides you with all the information you need about the climate in Helsinki.
Our site offers climate and forecast data for every country in the world. Are you going to Finland? On this website you can find 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 climate conditions. Find out where to go with our weather planner.