Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
Weather Guide
Sumba, East Nusa Tenggara, Indonesia Average Monthly Weather
Weather score72Very good annual avg
Best months: August, July, September
Across the year, average daytime temperatures are around 32°C, sunshine averages 7.9h per day, and rainfall totals about 1718mm. Sea temperatures average 28°C across the year.
Annual weather
Annual averages
Temp
32°C
Rain
1718mm
Annual total
Sun
7.9h
Sea
28°C
Weather score
72
Very good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 27mm, which is relatively low for holiday planning.
Bright
Sunshine averages 8.6h per day, so bright days are a strong part of the month.
Swimmable
Sea temperatures average 26°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Sumba, East Nusa Tenggara, Indonesia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
July31°C average high
July is close to Sumba's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
July27mm average rain
July is one of Sumba's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJune to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
July8.6 hours average sun
July is brighter than Sumba's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsMay to October
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
July26°C average sea
July is below Sumba's yearly sea-temperature average, so swimming can feel fresher.
Warmest seaJanuary to April and November to December
Sea temperatures are usually near 29°C in this stretch, so swimming comfort is at its strongest.
Weather score
July87 weather score
July is one of Sumba's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
