August is the hottest month in Sumatra with an average temperature of 26°C (79°F) and the coldest is January at 3°C (37°F) with the most daily sunshine hours at 7 in December. The wettest month is May with an average of 880mm of rain. The best month to swim in the sea is in August when the average sea temperature is 26°C (79°F).
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Sunrise 05:56
Sunset 18:01
Sunrise 05:56
Sunset 18:01