July is the hottest month in St Malo with an average temperature of 17°C (63°F) and the coldest is January at 6°C (42°F) with the most daily sunshine hours at 7 in August. The wettest month is October with an average of 70mm of rain. The best month to swim in the sea is in August when the average sea temperature is 18°C (64°F).
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Sunrise 08:26
Sunset 17:22
Sunrise 08:26
Sunset 17:22