Warm
Average highs sit around 28°C, giving warm days by monthly-average standards.
September verdict
Palmerston Island, Cook Islands in September
Weather score77Very good
Very good for holiday weather
Average highs sit around 28°C, giving warm days by monthly-average standards. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 88mm, so some wet days are possible.
September weather
Monthly averages
Temp
28°C
Rain
88mm
Sun
0h
Sea
26°C
Weather score
77
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 88mm, 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 26°C, which can work for swimming but may feel fresh.
Map
Weather map
Compare Palmerston Island, Cook Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September28°C average high
September is close to Palmerston Island's usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September88mm average rain
September sits on the drier side of Palmerston Island'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 Palmerston Island's usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
September26°C average sea
September is one of the cooler sea months locally, though the water still averages warm enough for most swimmers.
Warmest seaJanuary to May and December
Sea temperatures are usually near 28°C in this stretch, so swimming comfort is at its strongest.
Weather score
September77 weather score
September is one of Palmerston Island's best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsJune to November
These months have the strongest weather score in the monthly averages.