Mombasa in September
In September, Mombasa averages 27°C (81°F) during the day and 23°C (74°F) at night, with frequent rain — about 27 days of the month see precipitation (69 mm total).
ShoulderConditions are warm and beach-friendly. Expect daily rain or showers, often in heavy bursts.
September offers comfortable temperatures in Mombasa, with some rain to plan around.
How September compares to the rest of the year in Mombasa
September is in the middle of the year for warmth in Mombasa (9th of 12) and moderately rainy compared to the rest of the year (8th of 12). Daytime temperature runs 1°C below the annual average (29°C). September runs 1°C warmer than August (27°C) and warms a further 1°C into October (28°C).
September sunrise & sunset in Mombasa
Times shown for Mombasa local time (Africa/Nairobi), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Mombasa — September
Golden-hour and blue-hour windows for the 15th of September, in Mombasa's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Mombasa in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Mombasa's popularity.
Crowds & pricing — September in Mombasa
Mombasa is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in Mombasa
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Sea temperature in Mombasa — September
Across the year Mombasa's sea swings from 26.3°C (August) to 29.5°C (March) — September sits at 26.7°C.
Mombasa in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 30°C / 87°F | 25°C / 77°F | 23 mm | 18 | — |
| February | 31°C / 87°F | 25°C / 77°F | 16 mm | 18 | — |
| March | 31°C / 87°F | 26°C / 78°F | 79 mm | 25 | — |
| April | 29°C / 85°F | 25°C / 77°F | 230 mm | 30 | — |
| May | 28°C / 82°F | 24°C / 76°F | 251 mm | 29 | — |
| June | 27°C / 80°F | 24°C / 75°F | 93 mm | 27 | — |
| July | 26°C / 79°F | 23°C / 73°F | 79 mm | 29 | — |
| August | 27°C / 80°F | 23°C / 73°F | 59 mm | 29 | — |
| September | 27°C / 81°F | 23°C / 74°F | 69 mm | 27 | — |
| October | 28°C / 83°F | 24°C / 75°F | 94 mm | 28 | — |
| November | 29°C / 84°F | 24°C / 76°F | 126 mm | 29 | — |
| December | 30°C / 86°F | 25°C / 77°F | 89 mm | 25 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Mombasa in September →
Frequently asked questions
How hot is Mombasa in September?
In September, Mombasa averages a high of 27°C (81°F) and a low of 23°C (74°F) — generally warm.
Does it rain a lot in Mombasa in September?
September is quite rainy in Mombasa, with about 27 rainy days on average.
Is September a good time to visit Mombasa?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Mombasa in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Mombasa for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.