Warm
Average highs sit around 32°C, giving warm days by monthly-average standards.
December verdict
Sumba, East Nusa Tenggara, Indonesia in December
Weather score57Good
Good for holiday weather
Average highs sit around 32°C, giving warm days by monthly-average standards. Sunshine averages 6.9h per day, enough for a balanced month. Rainfall averages 261mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
32°C
Rain
261mm
Sun
6.9h
Sea
29°C
Weather score
57
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 261mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.9h per day, enough for a balanced month.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Sumba, East Nusa Tenggara, Indonesia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December32°C average high
December 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
December261mm average rain
December is one of Sumba's wettest months, so rain is likely to be a major planning factor.
Driest monthsJune to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December6.9 hours average sun
December is below Sumba's yearly sunshine average, so bright-day planning is less reliable than in peak months.
Brightest monthsMay to October
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December29°C average sea
December is one of Sumba's warmest sea months, when swimming comfort is usually strongest.
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
December57 weather score
December scores below Sumba's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJune to September
These months have the strongest weather score in the monthly averages.
