September · Kenya
Best time to visit Mombasa in September Weather, crowds & prices
Weather in Mombasa in September
Average temperature 25°C, 126 mm of rain, about 27 days with 6+ hours of sunshine and 77% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
7.9/10
Ranked #8 of 12 months
- Avg temp
- 25°C
- Rainfall
- 126 mm
- Humidity
- 77%
- Days with 6h+ sun
- 27
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Mombasa scores 7.9/10 for beach and coastal travel - ranked #8 of 12. Expect around 25°C, 126 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Mombasa's Swahili old town, dhow harbour and Indian Ocean beaches make it Kenya's coastal capital.
September holds up well in Mombasa — 8th best month
September averages 25°C (76°F) — warm enough for beach and boat plans, still short of the heat that pushes sightseeing into early morning.
Monthly rainfall reaches 126 mm — wet for this destination — but about 27 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 7.9/10 here, 8th of 12 months, against 9.8/10 in the destination's best month.
Pack light clothing, swimwear and real sun protection, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? January scores 1.9 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Mombasa in September?
- In September, Mombasa averages 25°C, 126 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 7.9/10.
- Is September a good time to visit Mombasa?
- September earns a 7.9/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Mombasa in September?
- Expect about 126 mm of rain in September. Average humidity is 77% and there are about 27 days with 6+ hours of sunshine.
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