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Diani Beach Weather in September
During September, Diani Beach experiences high daytime temperatures of 28°C (82°F) and cooler nights around 23°C (73°F). Expect quite a bit of rainfall. Around 61 mm (2.4 in) is typical.
Rainfall in Diani Beach in September
Historically, approximately 12 days this month are expected to have rain, averaging 61 mm (2.4 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Diani Beach in September
Diani Beach has excellent weather in September, with days reaching 28°C (82°F) and nights cooling to 23°C (73°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 23°C (73°F), evenings and nights remain warm. Light clothing and an open window or fan can help you sleep comfortably.
Sunshine in Diani Beach in September
Enjoy a sunny month with about 246 hours of sunshine, the clear skies make Diani Beach even more beautiful.If your ideal day consists of dry skies and pleasant temperatures, July, August, September and October typically offer the best circumstances for Diani Beach.
Diani Beach Temperature in September
Min Temperature
23°C (73°F)
Max Temperature
28°C (82°F)
Chance of Rain
39%
Precipitation
61 mm (2.4 in)
Rainy days
12 days
Humidity
80% *
Sunshine
246 hours *
Percentage Sunshine
*
* Data from: Mombasa, Kenya (32 KM, 20 Miles).
Diani Beach Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Diani Beach - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Diani Beach typically stay consistent throughout September, with daily highs averaging around 28°C (82°F). Nights are warm, with lows around 22°C (72°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Diani Beach in September
Browse day-by-day weather records for Diani Beach spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Diani Beach historical weather extremes in September
Based on 26 years of weather observations (1999-2025), these are the most extreme conditions recorded in Diani Beach.
- The warmest day in September was on September 13, 2008, with a maximum of 34°C (93°F).
- The lowest daytime temperature in September was 24°C (75°F), recorded on September 16, 1999.
- Diani Beach registered its coldest September night on September 3, 2020, with temperatures dropping to 19°C (66°F).
Best Places in Kenya in September
Find out more about the weather in Kenya and which places have the best travel conditions in this month. See all of Kenya in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Diani Beach in September
Warm but pleasant conditions in Diani Beach in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Wet weather is likely, so pack waterproof gear for multiple rainy days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.
What To Do in Diani Beach in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling8/10 -
Walking8/10 -
Camping8/10 -
Outdoor sports8/10
Diani Beach 3-Day Forecast
More climate data for Diani Beach
Temperature Rainfall Sunshine Humidity
See the full Diani Beach climate overview or explore weather in Kenya.
Popular in September
Where to go in September - average daytime high across popular destinations.
Mombasa
29°C (84°F) Malindi
28°C (82°F) Watamu28°C (82°F) Diani Beach28°C (82°F) Kisumu28°C (82°F) Nairobi
26°C (79°F) Nakuru24°C (75°F) Naivasha21°C (70°F) Bucket list
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The 10 best wildlife viewing sites in Kenya
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