Seppanen or Neekerisaari is an island in Finland. It is located in the economic region of Joensuu and the province of Pohjois-Karjala, in the southeastern part of the country, 300 km northeast of Helsinki, the capital of the country.
The climate is boreal.
The average temperature is 0 °C (32 °F). The warmest month is August, at 16 °C (61 °F), and the coldest is January, at −16 °C (3 °F)
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