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In page Cevio:

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Cevio village has a Maritime Temperate climate (CfB) under the Köppen climate classification. The average annual temperature is 10 °C (50 °F). The average coldest month was January with an average temperature of 1 °C (34 °F), while the warmest month was July with an average temperature of 19.5 °C (67.1 °F).[2]