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Helsinki weather in September 2023
- 1414°C max day temperature
- 1717 days with some rainfall
- 77°C min night temperature
- 1313 hours of daylight per day
- 0No heat & humidity
- 7373 mm of monthly rainfall
- 33 (Moderate) UV index
- 1414°C sea temperature
Recommended for Finland
The September weather guide for Finland (Helsinki) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
Metric (°C / mm) | Imperial (°F / inches)
How warm is it in Helsinki in September?
Daytime temperatures usually reach 14°C in Helsinki in September, falling to 7°C at night.
How sunny is it in Helsinki in September?
There are normally 4 hours of bright sunshine each day in Helsinki in September - that's 33% of daylight hours.
How warm is the sea around Helsinki in September?
The average sea temperature around Helsinki in September is 14°C.
Does it rain in Helsinki in September?
There are usually 17 days with some rain in Helsinki in September and the average monthly rainfall is 73mm.
Helsinki September sunrise & sunset times
Browse the sunrise and sunset times for Helsinki in September 2023. Select a month to view Helsinki sunrise and sunset times for the next 12 months.
|Date||Sunrise times||Sunset times|
|Friday, 1st September 2023||06:14||20:25|
|Friday, 15th September 2023||06:47||19:43|
|Saturday, 30th September 2023||07:22||18:57|
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