July is the hottest month in Siena with an average temperature of 24°C (73°F) and the coldest is January at 7°C (44°F) with the most daily sunshine hours at 9 in July. The wettest month is November with an average of 95.3mm of rain. The best month to swim in the sea is in August when the average sea temperature is 26°C (77°F).
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Sunrise 07:16
Sunset 16:45
Sunrise 07:16
Sunset 16:45