Sumatra’s climate is tropical but temperatures can often be lower than expected due to the highlands. The average daytime highs range from 72°F – 86°F (22°C – 30°C) while the rainfall differs from region to region and humidity levels are high in the lowlands. With two main seasons, the dry season runs from February to August and wet season from September to January. The best time of year to visit Sumatra is during the dry season.
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