Mombasa weather in September
September is one of the best months to visit Mombasa: highs of 30°C (86°F) and about 38 mm (1.5 in) of rain on average. Nights average 21°C (69°F) and cloud cover 38% (NASA POWER, 2001–2025 averages). The sea averages 27°C (80°F). It is the 5th driest month of the year and the 5th coolest. Compared with August, it is warmer and wetter; October brings highs of 31°C (87°F) and 98 mm (3.9 in) of rain.
Is September a good time to visit Mombasa?
best month Weather score 86/100.
Yes. September is one of the best months for weather in Mombasa.
Does it rain a lot in Mombasa in September?
No, it is usually dry: about 38 mm (1.5 in) falls in an average September. It is the 5th driest month of the year.
How warm is Mombasa in September?
Days average 30°C (86°F) and nights 21°C (69°F).
Mombasa weather by month
| Month | High | Low | Rain | Cloud | Sea | Weather |
|---|---|---|---|---|---|---|
| January | 33°C (92°F) | 23°C (73°F) | 24 mm | 53% | 29°C (84°F) | best |
| February | 34°C (94°F) | 23°C (73°F) | 15 mm | 52% | 29°C (85°F) | fair |
| March | 33°C (91°F) | 23°C (74°F) | 62 mm | 52% | 30°C (86°F) | fair |
| April | 31°C (87°F) | 23°C (74°F) | 129 mm | 59% | 30°C (85°F) | fair |
| May | 29°C (84°F) | 22°C (72°F) | 217 mm | 60% | 28°C (83°F) | least pleasant |
| June | 28°C (82°F) | 21°C (69°F) | 74 mm | 52% | 28°C (82°F) | best |
| July | 28°C (82°F) | 20°C (68°F) | 36 mm | 50% | 27°C (80°F) | best |
| August | 29°C (83°F) | 20°C (68°F) | 29 mm | 45% | 26°C (79°F) | best |
| September | 30°C (86°F) | 21°C (69°F) | 38 mm | 38% | 27°C (80°F) | best |
| October | 31°C (87°F) | 21°C (71°F) | 98 mm | 43% | 27°C (81°F) | fair |
| November | 31°C (88°F) | 22°C (72°F) | 104 mm | 47% | 28°C (82°F) | fair |
| December | 32°C (90°F) | 23°C (73°F) | 69 mm | 48% | 29°C (84°F) | fair |
Sources: 2001–2025 monthly averages from NASA POWER (MERRA-2 reanalysis), sea temperature from Open-Meteo Marine. Page updated . How we rate months