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Climate · Avarua

Avarua in September

Warm and damp, as the days lengthen.

Typical weather, averaged over 30 years

September in Avarua is warm, around 73°F through the day and night. Rain falls on about three days a week, more often as the month goes on, and the days lengthen by 26 minutes from the first week to the last.September in Avarua is warm, around 23°C through the day and night. Rain falls on about three days a week, more often as the month goes on, and the days lengthen by 26 minutes from the first week to the last.

Typical
73°F23°Caverage
Wet days
3a week · 36% of days
Daylight
12h 01mon average

Is September a good time to visit Avarua?

Yes. September is one of Avarua's best months (June to September).

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Around 73°F in September, against 73°F to 79°F through the year.Around 23°C in September, against 23°C to 26°C through the year.

Chance of a wet day

36% of days in September, against 29% to 73% through the year.

Cloud cover

54% cover in September, against 49% to 76% through the year.

Daylight

12h 01m in September, against 10h 52m to 13h 24m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August73°23°2 wet days a weekRain on about two days a week.
  2. September73°23°3 wet days a weekRain on about three days a week.
  3. October74°23°3 wet days a weekRain on about three days a week.

Where Avarua sits, in September

Pacific/Rarotonga
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:36 AMsets 6:33 PM
Above the sea
0 mlow-lying
Latitude
21.2°Ssouthern hemisphere
Nearest of ours
Aitutaki264 km north

The land around Avarua, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in Cook Islands in September

typical · wet days
See September on the planning mapThe whole year in Avarua

Typical weather, averaged over 30 years (1995–2024). Avarua sits on a grid square that is mostly sea, where the data hold only a daily average, so the page shows one typical temperature, not a high and a low. Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.