Sumba Temperature by Month
Sumba, East Nusa Tenggara, Indonesia has a consistently very warm climate year-round, with daytime highs averaging 30°C (86°F). Below you'll find a full monthly breakdown and a comparison with cities worldwide.
Sumba Monthly Temperatures
The temperature in Sumba remains steady throughout the year, providing a consistently very warm climate. Maximum daytime temperatures range from a very warm 32°C (90°F) in October to a comfortable 29°C (84°F) in August. Nights are mild year-round, with lows ranging from 24°C (75°F) in October to 21°C (70°F) in August.
The chart below illustrates the average maximum day and minimum night temperatures in Sumba by month:
Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
45-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in June
Historical Sumba Temperatures: 1976-2026
Browse day-by-day temperature records for Sumba spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Sumba vs Indonesia
The map below shows the annual temperature across Indonesia. You can also select individual months if you want to compare a specific time of year.
very warm
warm
pleasant
moderate
cold
very cold
Sumba vs World: Temperature Compared
Sumba's average annual maximum temperature is 30°C (86°F). To put that in context, here's how it compares to a few well-known destinations:
Lisbon, Portugal averages 21°C (70°F) annually — warm summers, mild winters, and rain mainly in the cooler months.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.
Tokyo, Japan averages 21°C (70°F) a year, with hot summers, cool winters, and a well-defined cherry blossom spring.
Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.
The readings come from a range of sources — land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.
For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained — so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.
For more on Sumba's weather — including monthly rainfall, sunshine hours, and humidity — visit our Sumba climate page.
