Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
December verdict
Southern Cook Islands, 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 198mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
29°C
Rain
198mm
Sun
0h
Sea
26°C
Weather score
69
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 198mm, so showers are a real planning factor.
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 Southern Cook Islands, Cook Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December29°C average high
December sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJanuary to May and December
This stretch sets the upper range for average daytime heat.
Rain
December198mm average rain
December is one of Southern Cook Islands' wettest months, so rain is likely to be a major planning factor.
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 Southern Cook Islands' usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
December26°C average sea
December is close to Southern Cook Islands' yearly sea-temperature average, so swimming comfort is fairly typical.
Warmest seaJanuary to April
Sea temperatures are usually near 27°C in this stretch, so swimming comfort is at its strongest.
Weather score
December69 weather score
December scores below Southern Cook Islands' yearly average, so the weather trade-offs are more noticeable.
Best weather monthsJune and August to November
These months have the strongest weather score in the monthly averages.