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Weather in September in Helsinki

Finland flag
< September >
 
Normal Max/ High Temperature 15°C (59°F)
 
Average Temperature 12°C (53°F)
 
Min/ Low Temperature 8°C (46°F)
Average Sea or Water Temp 13°C(55°F)
 
Normal Precipitation 71mm (2.8in)
Number of Wet Days (probability of rain on a day) 15 (50%)
Average Sunlight per day 04:54
Average Daylight per day 12:53
Sunny (Cloudy) Daylight Hours 39% (61%)
Sun altitude at solar noon on the 21st day.
30.5°


  • The average sea tempeature is 13 °C (55.4 °F).
  • The average temperature in Helsinki in September is quite mild at 11.5 °C (52.7 °F).
  • Afternoons can be mild with average high temperatures reaching 15 °C (59 °F).
  • Overnight temperatures are generally a little cool with an average low of 8 °C (46.4 °F).
  • In September the range/ variation of daily mean temperatures is 7 °C (12.6 °F).
  • The weather in September is somewhat dry with rain once in a while. Just 71mm (2.8in) of H2O descends during on average 15 days.
  • The blue above Helsinki is slightly fair having on balance a mediocre 4:54 of magnificent sunshine daily.
  • The shortest day is 11:32 long and the longest day is 14:14 long with an average length of 12:53.
  • There are approximately 7:36 per day when bright sunshine is absent due to cloud, haze or the sun being too low on the horizon to register.
  • It is sunny approximately 39.2% of daylight hours and cloudy 60.8% of daylight hours.

Check the distance to and compare the Helsinki September averages with somewhere beginning with:

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Weather Trend Graph for September in Helsinki, Finland

Graph of weather in Helsinki in September

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