September weather forecast and climate
Diani Beach, Kenya

A shade and palm trees on the white sandy beaches of Diani, the coastal city in Kenya
A shade and palm trees on the white sandy beaches of Diani, the coastal city in Kenya

Weather in September

September, the first month of the spring, in Diani Beach, is also a moderately hot month, with average temperature varying between 21°C (69.8°F) and 29°C (84.2°F).

Temperature

In Diani Beach, Kenya, the average high-temperature is relatively the same as in August - a still moderately hot 29°C (84.2°F). In Diani Beach, the average low-temperature is 21°C (69.8°F).

Rainfall

In Diani Beach, during September, the rain falls for 12 days and regularly aggregates up to 63mm (2.48") of precipitation. In Diani Beach, during the entire year, the rain falls for 140 days and collects up to 1121mm (44.13") of precipitation.

Sea temperature

In Diani Beach, the average seawater temperature is 26°C (78.8°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 12.1h.

Sunshine

The average sunshine in September is 9h.

UV index

Months with the highest UV index are January through April, September through December, with an average maximum UV index of 12. A UV Index of 11, and more, symbolizes an excessive health risk from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 12 in September interpret into the following advice:
Take all necessary precautions, as unprotected skin can burn in minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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. Beware! The strength of the UV rays is significantly increased by the reflection of the water and sand.
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FAQ

What is the temperature in September in Diani Beach?

In September, in Diani Beach, Kenya, the average high-temperature is 29°C (84.2°F), and the average low-temperature is 21°C (69.8°F).

How much does it rain in Diani Beach in September?

In Diani Beach, Kenya, in September, during 12 rainfall days, 63mm (2.48") of precipitation is typically accumulated.

What is the sea water temperature in September in Diani Beach?

In Diani Beach, Kenya, in September, the average water temperature is 26°C (78.8°F). 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.

How many hours of daylight does Diani Beach have in September?

The average length of the day in September in Diani Beach is 12.1h.

How many hours of sunshine does Diani Beach have in September?

In Diani Beach, the average sunshine in September is 9h.

When is the highest UV index in Diani Beach?

Months with the highest UV index in Diani Beach are January through April, September through December, with an average maximum UV index of 12.

What is the UV index reading in September in Diani Beach?

In Diani Beach, the average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from the exposure to the Sun's UV rays.

Average temperature in September
Diani Beach, Kenya

Average temperature in September - Diani Beach, Kenya
  • Average high temperature in September: 29°C

The warmest month (with the highest average high temperature) is March (33°C).
Months with the lowest average high temperature are July and August (28°C).

  • Average low temperature in September: 21°C

Months with the highest average low temperature are February, March and April (24°C).
The coldest months (with the lowest average low temperature) are July and August (20°C).

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Average rainfall in September
Diani Beach, Kenya

Average rainfall in September - Diani Beach, Kenya
  • Average rainfall in September: 63mm

The wettest month (with the highest rainfall) is May (270mm).
The driest month (with the least rainfall) is February (17mm).

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Average rainfall days in September
Diani Beach, Kenya

Average rainfall days in September - Diani Beach, Kenya
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is May (19 days).
The month with the least rainy days is February (4 days).

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Average sea temperature in September
Diani Beach, Kenya

Average sea temperature in September - Diani Beach, Kenya
  • Average sea temperature in September: 26°C

The best months for swimming (with the highest average sea temperature) are March and April (29°C).
The coldest month (with the lowest average sea temperature) is August (25°C).

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Average daylight in September /
Average sunshine in September
Diani Beach, Kenya

Average daylight in September / Average sunshine in September - Diani Beach, Kenya
  • Average daylight in September: 12.1h

The month with the longest days is December (Average daylight: 12.4h).
Months with the shortest days are May, June and July (Average daylight: 11.9h).

  • Average sunshine in September: 9h

The month with the most sunshine is February (Average sunshine: 10h).
The month with the least sunshine is May (Average sunshine: 6h).

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Average UV index in September
Diani Beach, Kenya

Average UV index in September - Diani Beach, Kenya
  • Average UV index in September: 12

Months with the highest UV index are January, February, March, April, September, October, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 10).

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