Monthly climate guide
Mombasa weather in September
September in Mombasa is typically hot, with average daytime highs around 31°C (87°F) and night-time lows near 21°C (71°F). The month usually brings about 44 mm of rain (fairly dry) and is a mix of sun and cloud. Daytime highs are about the same as August and about the same as October.
What stands out in September
- Rain is well below Mombasa's usual level (around 48% less).
- Just 240 km apart, but Mombasa runs about 2°C warmer than Lamu this month.
- Humidity near 72% makes 31°C feel stickier than it sounds.
- It's one of the drier stretches of the year in Mombasa.
Avg high
31°C
87°F
Avg low
21°C
71°F
Rainfall
44 mm
fairly dry
Humidity
72%
relative
Sky
38%
cloud · a mix of sun and cloud
Mombasa weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 35°C / 95°F | 24°C / 75°F | 22 mm | 69% | 53% |
| February | 35°C / 96°F | 24°C / 75°F | 18 mm | 68% | 52% |
| March | 34°C / 94°F | 25°C / 76°F | 58 mm | 71% | 53% |
| April | 31°C / 88°F | 24°C / 75°F | 132 mm | 79% | 61% |
| May | 29°C / 84°F | 23°C / 73°F | 285 mm | 84% | 62% |
| June | 28°C / 83°F | 21°C / 71°F | 74 mm | 79% | 48% |
| July | 29°C / 83°F | 21°C / 69°F | 36 mm | 76% | 48% |
| August | 29°C / 85°F | 21°C / 70°F | 30 mm | 74% | 43% |
| September | 31°C / 87°F | 21°C / 71°F | 44 mm | 72% | 38% |
| October | 32°C / 89°F | 22°C / 72°F | 120 mm | 75% | 41% |
| November | 32°C / 89°F | 23°C / 73°F | 130 mm | 78% | 48% |
| December | 33°C / 91°F | 24°C / 74°F | 74 mm | 76% | 46% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- A small travel umbrella, just in case
- Sunglasses
Is September a good time to visit Mombasa?
Compare the months in the chart above to find your ideal window.
Best time to visit Mombasa →Other Kenya cities in September
Cite or embed this data
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Mombasa weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/kenya/mombasa/september
<a href="https://weathercompare.eu/weather/kenya/mombasa/september">Mombasa weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/kenya/mombasa" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Mombasa weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/kenya/mombasa/september">Mombasa weather in September</a> – WeatherCompare</p>
Mombasa in September: quick answers
Is September a good time to visit Mombasa?
Yes. September is one of the best months for Mombasa, with highs around 31°C and about 44 mm of rain.
How warm is Mombasa in September?
Average highs are about 31°C (87°F) and average lows about 21°C (71°F), based on 10 years of daily data.
Does it rain a lot in Mombasa in September?
Mombasa typically gets around 44 mm of rain in September — fairly dry.
Figures are long-term averages for the area around Mombasa (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.