ClimateForecastSeptemberOctober >>

Weather in September in Southern Finland

Considering a trip to Southern Finland this September and wondering about the expected weather conditions? Find all the crucial information you need right here, addressing your question:

What is the weather like in Southern Finland in September?

Southern Finland is a region in Finland. September in Southern Finland generally has mild temperatures, with moderate precipitation.

Temperatures

You can expect mild maximum daytime temperatures of around 16°C and nighttime temperatures around 8°C in Helsinki.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Hämeenlinna with an average of 58 mm to moderate rainfall in Taipalsaari with 74 mm.

Average sunshine

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.

For a closer look at September's conditions in Southern Finland, see the map below. For a more detailed look at Southern Finland's yearly weather, check out our Southern Finland climate page.

Where to go in Southern Finland in September

Find more information for the most popular destinations in the Southern Finland on the map below. Click on a destination dot for more detailes.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Southern Finland?

Helsinki

In September Helsinki generally has moderate temperatures with maximum daytime temperatures around 16°C, minimum nighttime temperatures around 8°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Helsinki
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
22°C 
12°C 
230 hours 
79 mm 
16 days 
16°C 
8°C 
151 hours 
64 mm 
17 days 
October   >> October
>>  
10°C 
3°C 
90 hours 
65 mm 
17 days 
poor 
Climate in Helsinki

Turku

In September Turku generally has moderate temperatures with maximum daytime temperatures around 17°C, minimum nighttime temperatures around 8°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Turku
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
22°C 
12°C 
228 hours 
83 mm 
15 days 
17°C 
8°C 
154 hours 
64 mm 
18 days 
October   >> October
>>  
10°C 
3°C 
88 hours 
66 mm 
18 days 
poor 
Climate in Turku

Rauha

In September Rauha generally has moderate temperatures with maximum daytime temperatures around 16°C, minimum nighttime temperatures around 8°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Rauha
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
21°C 
12°C 
82 mm 
16 days 
16°C 
8°C 
66 mm 
19 days 
October   >> October
>>  
8°C 
3°C 
66 mm 
19 days 
poor 
Climate in Rauha

Espoo

In September Espoo generally has moderate temperatures with maximum daytime temperatures around 16°C, minimum nighttime temperatures around 9°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Espoo
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
21°C 
13°C 
230 hours 
75 mm 
16 days 
16°C 
9°C 
151 hours 
65 mm 
18 days 
October   >> October
>>  
10°C 
4°C 
90 hours 
69 mm 
18 days 
poor 
Climate in Espoo

Naantali

In September Naantali generally has moderate temperatures with maximum daytime temperatures around 16°C, minimum nighttime temperatures around 9°C and moderate monthly rainfall. So on average the conditions are tolerable that month.

Naantali
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
21°C 
12°C 
228 hours 
81 mm 
15 days 
16°C 
9°C 
154 hours 
66 mm 
18 days 
October   >> October
>>  
10°C 
4°C 
88 hours 
70 mm 
18 days 
poor 
Climate in Naantali

Is your destination not in the list? Have a look at other destinations in Southern Finland, in Finland.

Is September the best time to visit Southern Finland?

In our opinion, September is a good time to visit Southern Finland with overall tolerable weather in Helsinki. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, June, July and August provide perfect weather in Helsinki. In contrast, January, February, March, April, October, November and December tend to have poor weather conditions.

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.

  • January      
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  • May      
  • June      
  • July      
  • August      
  • September      
  • October      
  • November      
  • December      
  • 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.