Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
May verdict
Cook Islands in May
Weather score64Good
Good for holiday weather
Average highs sit around 29°C, giving warm days by monthly-average standards. Sunshine averages 0h per day, so this is not one of the brighter months. Rainfall averages 143mm, so some wet days are possible.
May weather
Monthly averages
Temp
29°C
Rain
143mm
Sun
0h
Sea
27°C
Weather score
64
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 143mm, so some wet days are possible.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Warm sea
Sea temperatures average 27°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Cook Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
May29°C average high
May is close to Cook Islands' usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
May143mm average rain
May sits near Cook Islands' yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJune to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
May0 hours average sun
May is close to Cook Islands' usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
May27°C average sea
May is close to Cook Islands' yearly sea-temperature average, so swimming comfort is fairly typical.
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
May64 weather score
May is one of the weakest weather-score months, when the overall mix is less favourable than the rest of the year.
Best weather monthsJune to November
These months have the strongest weather score in the monthly averages.