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Sumatera

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Sumatera Weather, Climate and Best Time to Visit

Data source：Meteostat
Update date：2025-09

Sumatera year round climate

  • Spring (March to May): Average 27.4°C–28.0°C, humid and warm climate with abundant rainfall. Common activities: Visiting cultural heritage sites, jungle trekking (rain gear recommended). Recommended clothing: Light and breathable cotton clothing, raincoat or umbrella.
  • Summer (June to August): Average 27.4°C–27.6°C, drier climate with relatively less rainfall. Common activities: Beach relaxation, water sports. Recommended clothing: Light short-sleeved clothing, shorts, swimwear.
  • Autumn (September to November): Average 27.3°C–26.8°C, warm and humid climate with moderate rainfall. Common activities: Visiting temples, exploring local markets. Recommended clothing: Light and breathable cotton clothing, rain gear in case of afternoon showers.
  • Winter (December to February): Average 26.7°C–26.9°C, warm and humid climate with moderate rainfall. Common activities: Cultural experiences, visiting natural landscapes. Recommended clothing: Light and breathable cotton clothing, rain gear in case of afternoon showers.

Sumatera climatological average

Annual average temperature: approx. 27.3°C / Annual rainfall: approx. 3092 mm / Summer humidity: 75%–85% / Rainiest month: April

Sumatera monthly average temperature and precipitation

Month
Air temperature (°C)
Precipitation (mm)
January
26.7°C
270.7
February
26.9°C
349.3
March
27.4°C
186.7
April
27.5°C
352.7
May
28°C
304.7
June
27.4°C
299.7
July
27.6°C
126
August
27.4°C
203
September
27.3°C
184
October
27.5°C
227.6
November
26.8°C
329.4
December
26.9°C
259

Sumatera weather for the next seven days

9/14
Monday
Smoky haze
33.9°C/22.5°C
9/15
Tuesday
Sunny
35.1°C/23.1°C
9/16
Wednesday
Overcast
34.7°C/22.2°C
9/17
Thursday
Overcast
34°C/22.7°C
9/18
Friday
Overcast
33.4°C/23°C
9/19
Saturday
Light rain shower
31°C/23.3°C
9/20
Sunday
Light rain shower
28.7°C/22.9°C

Sumatera Frequently Asked Questions and Useful Information for Travel

Is Sumatra worth visiting?

Sumatra is an Indonesian paradise brimming with natural wonders. Imagine turquoise lakes set against steaming volcanoes, remote archipelagos fringed with empty beaches, and dense jungles alive with orangutans, tigers, and elephants. It's a destination that offers both peaceful exploration and thrilling adventure.

What is the best time of year to visit Sumatra?

The prime time to explore Sumatra is during its dry season, from May to September. This period offers the best conditions for outdoor activities like trekking and exploring national parks. While some rain is always possible, and smoke haze can occur later in the year from September to November, the shoulder months of April and October are also excellent. These times provide a great balance of good weather, fewer crowds, and fantastic opportunities for wildlife spotting.

How many days are recommended for a trip to Sumatra?

To truly experience the diverse attractions of Sumatra, we recommend allocating at least 7 to 10 days. This duration allows ample time for activities such as volcano hikes, rainforest trekking, and visiting breathtaking volcanic lakes. Any shorter stay might feel rushed, preventing you from fully immersing yourself in the island's offerings.

What are the key natural attractions in Sumatra?

Sumatra is a haven for nature lovers, boasting incredible landscapes. Key attractions include the stunning turquoise waters of Lake Toba, one of the largest volcanic lakes in the world, and the lush rainforests of Gunung Leuser National Park, a vital sanctuary for orangutans. You can also find active volcanoes like Mount Kerinci, offering challenging yet rewarding treks with panoramic views.

What unique wildlife can be seen in Sumatra?

Sumatra is one of the most biodiverse islands on Earth, home to critically endangered species. Visitors have the chance to encounter wild orangutans in their natural habitat, particularly in protected areas like Gunung Leuser. The island is also a crucial habitat for Sumatran tigers, elephants, and rhinos, though spotting these elusive creatures requires patience and often guided expeditions.