Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
January verdict
Atiu, Cook Islands in January
Weather score66Good
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 210mm, so showers are a real planning factor.
January weather
Monthly averages
Temp
29°C
Rain
210mm
Sun
0h
Sea
28°C
Weather score
66
Good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 210mm, 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 28°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
January29°C average high
January is one of Atiu's warmest months, with daytime heat above the yearly average.
Warmest monthsJanuary to May and November to December
This stretch sets the upper range for average daytime heat.
Rain
January210mm average rain
January 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
January0 hours average sun
January 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
January28°C average sea
January sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
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
January66 weather score
January 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.