September weather forecast
Rennell Island, Solomon Islands

September weather on Rennell Island presents a mixed bag of conditions. Matching August rainfall, with 176mm (6.93"), the weather remains pleasantly humid and warm. Stable sea temperatures continue to facilitate water-based recreational activities. The increase in daylight hours aligns with increasing activity on the island. As the UV index levels maximize, it's more important than ever to remember sunscreen.

Temperature

Rennell Island commences September with an average high-temperature of a still hot 30°C (86°F), maintaining the same temperature as the previous month. September brings Rennell Island a consistent average low-temperature of 22°C (71.6°F).

Rainfall

In Rennell Island, in September, it is raining for 14 days, with typically 176mm (6.93") of accumulated precipitation. Throughout the year, there are 196 rainfall days, and 2764mm (108.82") of precipitation is accumulated.

Sea temperature

The months with the coldest seawater are June through October, with an average sea temperature of 28°C (82.4°F).
Note: For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

The average length of the day in September is 12h and 2min.
On the first day of September, sunrise is at 06:22 and sunset at 18:16. On the last day of the month, sunrise is at 06:03 and sunset at 18:15 +11.

Sunshine

January through July, September and December, with an average of 6h of sunshine, are months with the least sunshine.

UV index

The months with the highest UV index are January through April, September through December, with an average maximum UV index of 12. A UV Index value of 11, and more, symbolizes an excessive health risk from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 12 in September translates into the following instructions:
Implement every essential safety step. Individuals with fair skin might receive burns in less than 5 minutes. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Sunscreen of at least SPF 30 should be applied generously and reapplied often on overcast days, especially post swim or outdoor exercise. Notice! The reflection of water and sand increases the UV radiation significantly.