Monthly climate guide
Nairobi weather in September
With highs near 29°C (83°F) and lows around 14°C (57°F), September feels hot in Nairobi. Rainfall averages about 19 mm (very dry) and the sky is often cloudy. Daytime highs are 2°C warmer than August and about the same as October.
What stands out in September
- Just 80 km apart, but Nairobi runs about 8°C warmer than Naivasha this month.
- It's one of the drier stretches of the year in Nairobi.
- Expect a big gap between day and night — about 15°C.
- Rain is well below Nairobi's usual level (around 61% less).
Avg high
29°C
83°F
Avg low
14°C
57°F
Rainfall
19 mm
very dry
Humidity
59%
relative
Sky
55%
cloud · often cloudy
Nairobi weather by month
Show the monthly averages as a table
| Month | Avg high | Avg low | Rain | Humidity | Cloud cover |
|---|---|---|---|---|---|
| January | 29°C / 83°F | 15°C / 58°F | 26 mm | 60% | 47% |
| February | 30°C / 85°F | 15°C / 59°F | 27 mm | 58% | 46% |
| March | 29°C / 85°F | 16°C / 60°F | 64 mm | 62% | 56% |
| April | 27°C / 81°F | 16°C / 60°F | 119 mm | 73% | 73% |
| May | 26°C / 79°F | 14°C / 58°F | 58 mm | 75% | 69% |
| June | 26°C / 78°F | 14°C / 56°F | 31 mm | 71% | 70% |
| July | 26°C / 79°F | 13°C / 55°F | 15 mm | 65% | 64% |
| August | 27°C / 81°F | 13°C / 56°F | 22 mm | 63% | 65% |
| September | 29°C / 83°F | 14°C / 57°F | 19 mm | 59% | 55% |
| October | 29°C / 84°F | 15°C / 59°F | 56 mm | 62% | 62% |
| November | 27°C / 81°F | 16°C / 60°F | 81 mm | 73% | 68% |
| December | 27°C / 80°F | 15°C / 59°F | 65 mm | 73% | 56% |
What to pack for September
- Light, breathable clothing (cotton or linen)
- A sun hat and high-SPF sunscreen
- A refillable water bottle
- An extra layer — evenings are noticeably cooler than afternoons
Is September a good time to visit Nairobi?
Compare the months in the chart above to find your ideal window.
Best time to visit Nairobi →Other Kenya cities in September
Cite or embed this data
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Nairobi weather in September. WeatherCompare, 2026 (NASA POWER / ERA5, 2011–2020 monthly averages). https://weathercompare.eu/weather/kenya/nairobi/september
<a href="https://weathercompare.eu/weather/kenya/nairobi/september">Nairobi weather in September</a> (WeatherCompare)
<iframe src="https://weathercompare.eu/embed/kenya/nairobi" width="300" height="160" style="border:0;border-radius:12px" loading="lazy" title="Nairobi weather in September"></iframe> <p style="font-size:12px"><a href="https://weathercompare.eu/weather/kenya/nairobi/september">Nairobi weather in September</a> – WeatherCompare</p>
Nairobi in September: quick answers
Is September a good time to visit Nairobi?
September is a reasonable time for Nairobi: highs around 29°C and about 19 mm of rain, though not one of the three best months.
How warm is Nairobi in September?
Average highs are about 29°C (83°F) and average lows about 14°C (57°F), based on 10 years of daily data.
Does it rain a lot in Nairobi in September?
Nairobi typically gets around 19 mm of rain in September — very dry.
Figures are long-term averages for the area around Nairobi (NASA POWER / ERA5, 2011–2020), not a forecast for a specific year. For upcoming days, see the live multi-source forecast.