Warm
Average highs sit around 31°C, giving warm days by monthly-average standards.
December verdict
Mentawai Islands, Indonesia in December
Weather score52Mixed
Mixed for holiday weather
Average highs sit around 31°C, giving warm days by monthly-average standards. Sunshine averages 6.5h per day, enough for a balanced month. Rainfall averages 303mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
31°C
Rain
303mm
Sun
6.5h
Sea
29°C
Weather score
52
Mixed
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 303mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.5h 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 Mentawai Islands, Indonesia with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December31°C average high
December is close to Mentawai Islands' usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
December303mm average rain
December is wetter than Mentawai Islands' yearly average, so flexible plans matter more.
Driest monthsFebruary, May to June, and August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December6.5 hours average sun
December sits close to Mentawai Islands' yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsFebruary and April to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
December29°C average sea
December is part of a consistently warm sea-temperature pattern, so swimming comfort changes little through the year.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
December52 weather score
December scores below Mentawai Islands' yearly average, so the weather trade-offs are more noticeable.
Best weather monthsFebruary and May to August
These months have the strongest weather score in the monthly averages.