September · Kenya
Best time to visit Nairobi in September Weather, crowds & prices
Weather in Nairobi in September
Average temperature 19°C, 22 mm of rain, about 29 days with 6+ hours of sunshine and 65% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.8/10
Ranked #2 of 12 months
- Avg temp
- 19°C
- Rainfall
- 22 mm
- Humidity
- 65%
- Days with 6h+ sun
- 29
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Nairobi scores 9.8/10 for nature and wildlife travel - one of the top 12-month picks (#2). Expect around 19°C, 22 mm of rain, and roughly 29 days with 6+ hours of sunshine this month.
Safari gateway parks and highland city energy feel best October through March.
September is one of the strongest months in Nairobi (2nd)
September averages 19°C (66°F) — warm for the outdoors: start trails early, use shaded routes at midday, and carry more water than you think you need.
Expect 22 mm of rain — occasional showers rather than washed-out days — alongside about 29 days with 6+ hours of sunshine and 12.1 daylight hours.
A 9.8/10 puts this among the year's best months in Nairobi (2nd of 12); only February scores higher, at 9.8/10.
Pack light clothing, a hat and real sun protection, footwear you can get muddy.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Nairobi in September?
- In September, Nairobi averages 19°C, 22 mm of rain, and about 29 days with 6+ hours of sunshine. Its climate-comfort score is 9.8/10.
- Is September a good time to visit Nairobi?
- September earns a 9.8/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Nairobi in September?
- Expect about 22 mm of rain in September. Average humidity is 65% and there are about 29 days with 6+ hours of sunshine.
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