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

At the outset of September in Rennell Island, Solomon Islands, the high-temperature averages a still tropical 30°C (86°F), parallel to the August readings. September's average low-temperature reading in Rennell Island settles at an agreeable 22°C (71.6°F).

Rainfall

In Rennell Island, during September, the rain falls for 14 days and regularly aggregates up to 176mm (6.93") of precipitation. In Rennell Island, Solomon Islands, during the entire year, the rain falls for 196 days and collects up to 2764mm (108.82") of precipitation.

Sea temperature

June through October, with an average sea temperature of 28°C (82.4°F), are months with the coldest seawater in Rennell Island.
Note: A water temperature from 25°C (77°F) to 29°C (84.2°F) is considered very warm and enjoyable, allowing water activities to be pleasant for extended periods without irritation.

Daylight

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

Sunshine

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

UV index

January through April, September through December, with an average maximum UV index of 12, are months with the highest UV index. A UV Index estimate of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for average individuals.
Note: In September, the maximum UV index of 12 transforms into these recommendations:
Utilize every vital safety procedure. Individuals with light skin may endure burns in less than 5 minutes. From 10 a.m. to 4 p.m., when UV radiation is at its strongest, limit direct exposure to the Sun and note that shade structures may not provide full sun protection. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Apply liberally and reapply a broad-spectrum sunscreen of SPF 30+ every two hours, and promptly after any outdoor workout or a swim. Caution! The mirror effect of sand and water ups the UV radiation strength.