Is Avatiu hot in September?
Days are typically warm at 26.1°C, while nights average 19.5°C.
Cook Islands · 1991–2020 normal
Avatiu in
September.
Typical September weather in Avatiu: 26.1°C by day, 19.5°C at night, 81 mm of rain over 7.3 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high26.1°C
Typical low19.5°C
Rain81 mm
Wet days7.3
In the year-round weather comparison, September scores 74 out of 100 (June leads the year at 76). Daylight is calculated as 12 h from latitude -21.20°. Open-water sea temperature is 24.4°C (13 km from the place centre).
September at a glance
What is Avatiu like in September?
Plain answers from the measured climate record—not a forecast or a promise about a particular trip.
Does it rain much?
The measured monthly average is 81 mm across about 7 wet days.
How much daylight is there?
There are about 12 h between sunrise and sunset at mid-month, calculated from the place latitude.
Is September a good time to visit?
September ranks 3 of 12 in our weather comparison; June ranks first.
Event window
Warm sea in September
The nearest open-water NOAA OISST 1991–2020 cell averages 24.4°C in September. A sheltered bay can run warmer than that open-water cell.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 4035712
- NOAA station
- CWM00091843 · RAROTONGA INTL
- Station distance
- 2 km from the place centre
- Coverage
- Good coverage · 24 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.
Next step
Choose your month.
Then plan the details.
The weather comparison for Avatiu is based on climate evidence, not payments from travel companies. Flight, accommodation and activity links will be clearly labelled when they are added; there are no booking offers on this page today.
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