Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
December verdict
Atiu, Cook Islands in December
Weather score68Good
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 204mm, so showers are a real planning factor.
December weather
Monthly averages
Temp
29°C
Rain
204mm
Sun
0h
Sea
27°C
Weather score
68
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 204mm, 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 Atiu, Cook Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
December29°C average high
December is close to Atiu's yearly temperature average, giving a typical read on daytime heat.
Warmest monthsJanuary to May and November to December
This stretch sets the upper range for average daytime heat.
Rain
December204mm average rain
December is one of Atiu's 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 Atiu's 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 Atiu's 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
December68 weather score
December scores below Atiu's 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.