Climate of Sumatra

The island Sumatra has a tropical rainforest climate. It is usually (very) warm, humid and rainy all year round. The average annual temperature for Sumatra is 28° degrees and there is about 2003 mm of rain in a year. It is dry for 27 days a year with an average humidity of 85% and an UV-index of 6.

Climate averages for the whole year

Day: the average daily temperature during the day is between 27°C and 29°C
Night:the average nighttime temperature is between 19°C and 20°C
Rain: it rains 328 days and there is a total of approximately 2003 mm rainfall
Sun hours: throughout the year there are 2887 sun hours

Maximum temperature:	between 27°C and 29°C
Warmest month:	29°C in August
Coldest month:	27°C in January
Night temperature:	between 19°C and 20°C
Dry days:	37 days
Days with rain:	328 days
Days with snow:	0 days
Total rain sum:	2003 mm
Hours of sunshine:	2887 hours

Climate of Sumatra
Temperature graph
Precipitation graph
Climate chart of Sumatra
The best travel time for Sumatra
Climate of Sumatra by month
Experiences with the weather of Sumatra

Do you want to go to Sumatra?

These are the travel companies where you can book a trip to Sumatra:

Booking.com

Temperature graph

This graph shows the average maximum temperature (red) and minimum temperature (blue) for Sumatra.

Precipitation graph

This graph shows the average amount of rainfall per month for Sumatra.

Climate table of Sumatra

In this climate table you can see at a glance what the average weather per month is for Sumatra. The data has been collected over a 30-year period, from which an average per month has been derived. From year to year the differences may be larger or smaller, but with this climate table you have a good idea of what the weather for Sumatra might be like in a given month.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Day temp. (°C)	27	28	28	28	28	28	28	29	28	29	27	27
Night temp. (°C)	20	20	20	20	20	19	19	19	20	20	20	20
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Precipitation (mm)	161	176	198	229	178	115	98	125	154	164	235	170
Days with rain	27	26	29	29	27	24	25	28	28	28	29	28
Dry days	4	2	2	1	4	6	6	3	2	3	1	3
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Sun hours per day	7	7	7	7	8	9	9	9	8	9	8	7
Wind force (Bft)	1	1	1	1	1	1	1	1	1	1	1	1
UV-index	6	5	6	6	6	6	6	6	6	6	6	6

Best time to visit Sumatra

The best time to visit Sumatra, Indonesia is in July. In this period you have a warm temperature and little precipitation. On the island of Sumatra, the warmest month is August with 29°C and the coldest is January with 27°C.

Climate of Sumatra by month

What is the average climate in a given month for Sumatra? Click on a month to see all monthly averages for sunshine, maximum and minimum temperatures, percent chance of rain per day, snowfall and number of rainy days.

January