September weather forecastDiani Beach, Kenya

Weather in September

The transition into September brings about an increase in temperature, but the climate remains refreshing and inviting. Rainfall remains at a lower level, giving residents and tourists more sunny days to indulge in. The decrease in rain from last month contributes to less humidity, making outdoor activities more pleasant. The sea temperature begins to see an upward trend, creating conditions excellent for swimming.

Temperature

Diani Beach registers an average high-temperature of a still warm 29°C (84.2°F) with the arrival of September, showing minor deviation from the preceding month. In Diani Beach, an average temperature of 21°C (69.8°F) is noted during September nights.

Rainfall

In Diani Beach, in September, it is raining for 12 days, with typically 63mm (2.48") of accumulated precipitation. Throughout the year, in Diani Beach, there are 140 rainfall days, and 1121mm (44.13") of precipitation is accumulated.

Sea temperature

In Diani Beach, in September, the average water temperature is 26°C (78.8°F).
Note: For any water activity, temperatures between 25°C (77°F) and 29°C (84.2°F) are deemed excellent and extremely satisfying for enduring periods.

Daylight

In September, the average length of the day in Diani Beach is 12h and 5min.
On the first day of September in Diani Beach, sunrise is at 06:20 and sunset at 18:22. On the last day of the month, sunrise is at 06:07 and sunset at 18:15 EAT.

Sunshine

The average sunshine in September in Diani Beach is 9h.

UV index

The months with the highest UV index in Diani Beach are January through April, September through December, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an extreme threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 12 transforms into these recommendations:
Execute every important safeguard, as unprotected skin and eyes could burn within moments. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Be cautious! Sand and water surfaces make the Sun's UV rays more potent.