The warmest month (with the highest average high temperature) is July (20.9°C).
The month with the lowest average high temperature is January (-9.6°C).
The month with the highest average low temperature is July (11.2°C).
The coldest month (with the lowest average low temperature) is January (-16.6°C).
The month with the highest number of rainy days is December (24 days).
The month with the least rainy days is July (13 days).
The best month for swimming (with the highest average sea temperature) is July (14.4°C).
The coldest month (with the lowest average sea temperature) is January (-1.6°C).
The month with the longest days is June (Average daylight: 21h and 12min).
The month with the shortest days is December (Average daylight: 4h and 12min).