Warm
Average highs sit around 29°C, giving warm days by monthly-average standards.
September verdict
Northern Cook Islands, Cook Islands in September
Weather score79Very good
Very 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 69mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
29°C
Rain
69mm
Sun
0h
Sea
29°C
Weather score
79
Very good
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 69mm, which is relatively low for holiday planning.
Limited sun
Sunshine averages 0h per day, so this is not one of the brighter months.
Warm sea
Sea temperatures average 29°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Northern Cook Islands, Cook Islands with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September29°C average high
September is close to Northern Cook Islands' usual daytime heat, with little temperature swing across the year.
Warmest monthsAll year
Daytime heat stays consistently warm through the year.
Rain
September69mm average rain
September is one of Northern Cook Islands' driest months, making outdoor days easier to plan than in wetter parts of the year.
Driest monthsApril to November
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September0 hours average sun
September is close to Northern Cook Islands' usual sunshine level, with limited seasonal swing across the year.
Brightest monthsAll year
Sunshine stays consistently strong through the year.
Sea temperature
September29°C average sea
September is part of a consistently warm sea-temperature pattern, so swimming comfort changes little through the year.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
September79 weather score
September is one of Northern Cook Islands' best weather-score months, combining the strongest overall balance in the yearly averages.
Best weather monthsApril and August to November
These months have the strongest weather score in the monthly averages.