Warm
Average highs sit around 27°C, giving warm days by monthly-average standards.
Weather Guide
Palmerston Island, Cook Islands Average Monthly Weather
Weather score69Good annual avg
Best months: August, October, September
Across the year, average daytime temperatures are around 29°C, sunshine averages 0h per day, and rainfall totals about 1721mm. Sea temperatures average 27°C across the year.
Annual weather
Annual averages
Temp
29°C
Rain
1721mm
Annual total
Sun
0h
Sea
27°C
Weather score
69
Good avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 54mm, which is relatively low for holiday planning.
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
August27°C average high
August 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
August54mm average rain
August is one of Palmerston Island's driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsJune to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August0 hours average sun
August 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
August26°C average sea
August 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
August78 weather score
August 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.