September weather forecast
Finland

September in Finland heralds the arrival of autumn, with a noticeable drop in temperatures and shorter daylight hours. Temperatures during this month typically range from 5°C (41°F) in the northern regions to 15°C (59°F) in the south, marking a significant departure from the warmth of the summer months.

Cities in the south, such as Helsinki and Turku, experience a milder climate due to the moderating influence of the Gulf Stream and North Atlantic Drift. However, regions further north like Lapland begin to feel the chill of the approaching winter, with temperatures falling more rapidly.

The 'midnight sun' phenomenon, characteristic of the Finnish summer, is no longer present in September. Instead, the nights become longer, offering the first opportunity to witness the stunning Northern Lights, particularly in the northernmost parts of the country.

September also sees an increase in rainfall, with the country receiving between 60mm (2.36") to 80mm (3.15") of precipitation. This makes it one of the wetter months of the year, with the increased rainfall often leading to chilly and damp conditions.

The transition from summer to autumn is visually evident in the Finnish landscape during September. The lush green vegetation gradually gives way to the brilliant hues of autumn, with trees displaying a striking palette of yellow, orange, and red. This transformation makes September a particularly scenic time to visit Finland.

As September transitions into October, temperatures continue to fall, and daylight hours reduce further. The Finnish landscape fully embraces autumn, showcasing its captivating beauty before the onset of the long Finnish winter.

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• Helsinki - September »
  On the last day of September, in Helsinki, sunrise is at 07:24 and sunset at 18:55 EEST. In Helsinki in September, it is raining for 14 days, with typically 56mm (2.2") of accumulated precipitation.
• Espoo - September »
  On the first day of September in Espoo sunrise is at 06:17 and sunset at 20:25. In Espoo in September, the average water temperature is 15.4°C (59.7°F).
• Tampere - September »
  Tampere experiences a temperature shift at the start of September, with average high-temperatures adjusting from an enjoyable 19.9°C (67.8°F) in August to a mild 14°C (57.2°F). On the first day of September in Tampere, sunrise is at 06:17 and sunset at 20:32.
• Vantaa - September »
  September in Vantaa brings a decrease in the average high-temperature, shifting from an agreeable 20.5°C (68.9°F) in August to a refreshing 14.8°C (58.6°F). During September, Vantaa experiences an average high-temperature of 14.8°C (58.6°F) and a low-temperature of 6.9°C (44.4°F).
• Oulu - September »
  The months with the least rainfall in Oulu are April and September Rain falls for 12.5 days and accumulates 25mm (0.98") of rain. In September, in Oulu the rain falls for 12.5 days.
• Turku - September »
  September marks Autumn's arrival in Turku, exhibiting a more noticeable drop in temperature compared to August. In Turku, in September, during 9 rainfall days, 64mm (2.52") of precipitation is typically accumulated.
• Jyväskylä - September »
  On the last day of September, in Jyväskylä sunrise is at 07:22 and sunset at 18:50 EEST. In September, in Jyväskylä, Finland, the rain falls for 13.2 days.
• Lahti - September »
  On the first day of September in Lahti, sunrise is at 06:11 and sunset at 20:23. In September, in Lahti, the rain falls for 11.2 days.
• Kuopio - September »
  In Kuopio, during September, the rain falls for 12.5 days and regularly aggregates up to 25mm (0.98") of precipitation. On the last day of September, in Kuopio, sunrise is at 07:15 and sunset at 18:42 EEST.
• Pori - September »
  On the last day of September, in Pori, sunrise is at 07:38 and sunset at 19:07 EEST. On the first day of September in Pori sunrise is at 06:25 and sunset at 20:40.
• Kouvola - September »
  On the last day of September, in Kouvola sunrise is at 07:18 and sunset at 18:47 EEST. On the first day of September in Kouvola sunrise is at 06:07 and sunset at 20:18.
• Joensuu - September »
  In Joensuu during September, the rain falls for 16.5 days and regularly aggregates up to 41mm (1.61") of precipitation. In Joensuu, in September, during 16.5 rainfall days, 41mm (1.61") of precipitation is typically accumulated.