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Herttoniemi Weather in October
Herttoniemi, Helsinki, Finland
About Herttoniemi in October
Herttoniemi sits in a sheltered valley between rocky ridges, which protects it from the strongest coastal winds but also traps cold air on calm winter nights, creating notable temperature inversions. The adjacent Vanhankaupunginlahti nature reserve provides a large green corridor that cools summer air flowing into the district from the east.
For detailed monthly temperature and rainfall data for Helsinki in October, see the Helsinki October weather guide.