Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
December verdict
Cook Islands in December
Weather score69Good
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 189mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
29°C
Rain
189mm
Sun
0h
Sea
27°C
Weather score
69
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 189mm, so showers are a real planning factor.
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
December29°C average high
December 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
December189mm average rain
December is wetter than Cook Islands' yearly average, so flexible plans matter more.
Driest monthsJune to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
December0 hours average sun
December 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
December27°C average sea
December 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
December69 weather score
December scores below Cook Islands' yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJune to November
These months have the strongest weather score in the monthly averages.