September weather forecast
Oneroa Village, Cook Islands

September sees Oneroa Village re-embrace the warmer weather, with temperatures rising steadily towards the month's end. A decrease in the rainfall amount to 102mm (4.02") marks the heart of the dry season. Increased sunshine hours ensure visitors and locals spend the majority of their day outdoors, basking in the tropical temperature. The sea keeps pace, holding a steady warmth. In summary, September’s weather oscillates back towards brighter, drier days.

Temperature

The high-temperature average in September for Oneroa Village is a still warm 26°C (78.8°F), staying closely aligned with August's conditions. Oneroa Village's average low-temperature during September nights is observed to be a refreshing 19°C (66.2°F).

Rainfall

The months with the least rainfall in Oneroa Village are July and September Rain falls for 5 days and accumulates 102mm (4.02") of rain.

Sea temperature

July through October, with an average sea temperature of 24°C (75.2°F), are months with the coldest seawater.
Note: Consideration of an individual's cold resistance, combined with conditions like sunshine, wind, and temperature, suggests that swimming in 24°C (75.2°F) water can be delightful. (Olympic swimming is usually in 25°C (77°F) to 28°C (82.4°F) water.)

Daylight

In September, the average length of the day is 11h and 59min.
On the first day of September, sunrise is at 06:40 and sunset at 18:22. On the last day of the month, sunrise is at 06:12 and sunset at 18:30 -10.

Sunshine

The average sunshine in September is 5h.

UV index

The average daily maximum UV index in September is 10. A UV Index value of 8 to 10 symbolizes a very high health risk from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 10 in September translates into these instructions:
Be constantly cautious; skin and eyes can be quickly affected if left unprotected. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Before stepping out, consider using a sunscreen with 30 SPF or more. Especially if you're one to burn easily, avoid prolonged sun exposure. Beware! Reflections from sand and water can intensify the Sun's UV radiation.