Avarua Weather in September
September in Avarua averages 25°C (77°F) during the day and 22°C (72°F) at night. Quite a bit of rainfall is typical this month, with around 81 mm (3.2 in) on average. An umbrella is a good idea.
Rainfall in Avarua in September
Analyzing past climate data, one can expect approximately 11 days of rain, averaging 81 mm (3.2 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Avarua in September
Avarua has perfect weather in September, with days reaching 25°C (77°F) and nights cooling to 22°C (72°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 22°C (72°F) overnight, nights are warm enough to sit outside comfortably in light clothing.
Sunshine in Avarua in September
With about 182 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.
Wind Speed in Avarua in September
Wind speeds average 5 m/s (10 knots) during September. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.Our weather planner can help you find worldwide destinations with pleasant weather during this period. June, August, September and October typically offer the best weather for Avarua.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Cook Islands, check out our Avarua's climate page.
Avarua Temperature in September
Min Temperature
22°C (72°F)
Max Temperature
25°C (77°F)
Chance of Rain
38%
Precipitation
81 mm (3.2 in)
Rainy days
11 days
Humidity
80% *
Windspeed
5 m/s (10 knots) *
Sunshine
182 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Avarua typically stay consistent throughout September, with daily highs averaging around 25°C (77°F). Nights are warm, with lows around 21°C (70°F).
Average temperatures in September
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Avarua in September
Browse day-by-day weather records for Avarua spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Avarua historical weather extremes in September
Based on 49 years of weather observations in Avarua between 1976 and 2025, these are the recorded extremes.
- The warmest day in September was on September 11, 2003, with a maximum of 31°C (88°F).
- On September 12, 1984, Avarua saw its coldest September day with temperatures maxing out at 20°C (68°F).
- Avarua registered its coldest September night on September 3, 2003, with temperatures dropping to 14°C (57°F).
Best Places in the Cook Islands in September
Find out more about the weather in the Cook Islands and which places have the best travel conditions in this month. See all of the Cook Islands in September →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Avarua in September
For Avarua in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Avarua in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the Cook Islands, check out our Avarua's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed
See the full Avarua climate overview or explore weather in the Cook Islands.
