Mild
Average highs are around 26°C, so days are mild rather than hot.
September verdict
Mangaia, Cook Islands in September
Weather score75Very good
Very good for holiday weather
Average highs are around 26°C, so days are mild rather than hot. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 86mm, so some wet days are possible.
September weather
Monthly averages
Temp
26°C
Rain
86mm
Sun
0h
Sea
24°C
Weather score
75
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 86mm, so some wet days are possible.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Swimmable
Sea temperatures average 24°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Mangaia, Cook Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September26°C average high
September is cooler than the yearly average, which can make sightseeing feel gentler than in hotter months.
Warmest monthsJanuary to May and December
This stretch sets the upper range for average daytime heat.
Rain
September86mm average rain
September sits on the drier side of Mangaia'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
September0 hours average sun
September is close to Mangaia's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
September24°C average sea
September is one of the coolest sea months, so the water may feel fresher than in peak months.
Warmest seaJanuary to April
Sea temperatures are usually near 27°C in this stretch, so swimming comfort is at its strongest.
Weather score
September75 weather score
September sits close to Mangaia's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune and August to December
These months have the strongest weather score in the monthly averages.