Weather in Nairobi in September 2025
Average weather
Average temperature in Nairobi in September
Going from a maximum of +28°C during the day to a minimum of +13°C during the night, the temperature in September averages around +26°C.
The average maximum temperature goes up 7% by the end of the month, compared with the beginning of the month, from +25°C to +26°C.
Is Nairobi warm or cold in September?
Nairobi is typically warm in September.
Maximum temperatures go up compared to the previous month from +23°C to +25°C. The minimum temperature also goes up from +13°C to +14°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
Take a look at how September is compared to other months in Nairobi:
Climate in Nairobi in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +23°C | +25°C | +26°C | ||||
| Min. temperature | ||||||
| +8°C | +9°C | +6°C | ||||
| Max. temperature | ||||||
| +30°C | +33°C | +31°C | ||||
| Rainfall | ||||||
| 15 mm | 13 mm | 29 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 3 m/s | ||||
| Humidity | ||||||
| 70% | 65% | 66% | ||||
| Air pressure | ||||||
| 1019 HPa | 1018 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 1 | 1 | 1 | ||||
| Cloudy days | ||||||
| 17 | 18 | 14 | ||||
| Rainy days | ||||||
| 13 | 10 | 15 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as good as in August. It’s getting warmer as September arrives. The average maximum temperature goes up from +23°C to +25°C during the day. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 15 mm to 13 mm. It feels drier, as humidity decreases from 70% to 65%. The average wind speed doesn’t change much during September, staying around 2 m/s. The amount of sunny days stay about the same, averaging 1 sunny days during the month.
October brings much the same weather, it remains good.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Nairobi is gradually increasing during September, going from 3 m/s to 4 m/s over the course of the month.
Rain
How was the weather last September in Nairobi?
Climate Change over Years
The climate in Nairobi in September has not changed much over the last 43 years.
The average temperature was the lowest in 1989 (+23°C) and the highest in 2017 (+26°C). The driest year was 2000 with only 199 mm of rainfall, and the wettest year was 2019 with 920 mm.
FAQ
Is September a good time to visit Nairobi?
Can you sunbathe in Nairobi in September?
Is Nairobi rainy in September?
Is it sunny in Nairobi in September?
Other cities in Kenya
Monthly weather in Nairobi
Source of the data
For this page, we’ve looked at the typical weather in Nairobi, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.