Hot
Average highs reach 32°C, so days can feel very hot.
September verdict
Sumba, East Nusa Tenggara, Indonesia in September
Weather score84Very good
Very good for holiday weather
Average highs reach 32°C, so days can feel very hot. Sunshine averages 9h per day, so bright days are a strong part of the month. Rainfall averages 45mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
32°C
Rain
45mm
Sun
9h
Sea
27°C
Weather score
84
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 45mm, which is relatively low for holiday planning.
Bright
Sunshine averages 9h per day, so bright days are a strong part of the month.
Swimmable
Sea temperatures average 27°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
September32°C average high
September 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
September45mm average rain
September sits on the drier side of Sumba's year, which helps with sightseeing and transfers.
Driest monthsJune to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September9 hours average sun
September is one of Sumba's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay to October
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September27°C average sea
September 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
September84 weather score
September 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.
