Sumatra climate and temperatures

The climate of Sumatra is a tropical rainforest climate (Köppen: Af), with high temperatures and heavy rainfall year-round, without a true dry season. Monthly temperatures range from a minimum of 31°C in January to a maximum of 33°C in April. The average annual temperature is around 32°C.

During the colder months, nighttime temperatures average around 22°C, while in the warmer months they average about 24°C.

Climate table of Sumatra

The climate table below gives you a clear overview of the climate in Sumatra by month, from average temperatures and rainfall to UV levels. This makes it easy to see when the weather best suits your travel plans.

Best time to visit Sumatra

The best time to visit Sumatra is January, February, March, April, May, June, July, August, September, October, November en December. During this period, temperatures are usually pleasant to warm and there is relatively little rainfall. Between January and December, average high temperatures range roughly from 31°C to 31°C, while rainfall remains limited. The warmest month is April, with an average daytime temperature of around 33°C. The driest month is July, with about 130 mm of rainfall, while November is usually the wettest month of the year, with approximately 380 mm. Snow plays virtually no role in the climate here.

Average temperature per month

This chart shows the average daytime (maximum) and nighttime (minimum) temperatures per month in Sumatra. The figures are based on climate data from recent years and are presented in degrees Celsius, so you can clearly see the temperature range for each month.

Average rainfall per month

This chart shows the average monthly rainfall in Sumatra. The figures are based on long-term climate data and are displayed in millimeters, so you can immediately see which months are drier or wetter.

Average UV index per month

This chart shows the average monthly sun intensity in Sumatra. The UV index ranges from 0 (no UV radiation) to 11+ (extreme). A higher UV index means you can burn more quickly, making proper sun protection increasingly important.

Average annual temperature

This chart shows the average annual temperature in Sumatra based on data from the past ten years. It allows you to see at a glance how the climate is evolving and whether there are clear warming trends.

Average annual rainfall

This chart shows the average annual rainfall in Sumatra over the past ten years. It allows you to see at a glance how much rain falls each year and whether there are clear fluctuations between the years.

Weather experiences in Sumatra

The weather in Sumatra is rated an average of 4.3 out of 5 stars by 8 visitors. Have you been to Sumatra? Share your experience with the weather to help other visitors plan their trip.

Average weather per month

Click on a month below and discover what the weather in Sumatra is typically like. For each period, you can instantly see the average temperature, rainfall, wind, and UV index. Thanks to years of historical weather data, you’ll know exactly what to expect during your trip.

• January
• February
• March
• April
• May
• June
• July
• August
• September
• October
• November
• December