Nairobi Weather in September: What to Expect
In September, Nairobi averages highs of 25.1°C and lows of 13.4°C, with about 7 rainy days (~34 mm). Verdict: Good — comfortable — manageable 25.1°C days. That makes it the 5th hottest of Kenya's 6 main cities this month.
September in Nairobi offers pleasant conditions for your group tour, feeling comfortably warm during the day with temperatures around 25°C, making midday ideal for exploring sights like Nairobi National Park or the Karen Blixen Museum. Evenings cool down significantly to about 13°C, so a light jacket is advisable. While it's one of Kenya's warmer cities this month, the heat isn't oppressive, and with roughly seven rainy days, light showers are possible. Carry a compact umbrella for unexpected rain.
Nairobi vs other Kenya cities in September
Kenya is not one climate. In September, Amboseli runs to 29.4°C while Lake Nakuru sits at 24.4°C — a 5°C spread. Here is where Nairobi falls:
| City | Avg high | Avg low | Rainy days |
|---|---|---|---|
| Amboseli | 29.4°C | 16.4°C | 3 |
| Masai Mara | 28.5°C | 15.3°C | 6 |
| Diani Beach | 27.4°C | 23°C | 22 |
| Mombasa | 27.3°C | 23.3°C | 20 |
| Nairobi | 25.1°C | 13.4°C | 7 |
| Lake Nakuru | 24.4°C | 13.1°C | 11 |
What to pack for Nairobi in September
With highs near 25.1°C and lows around 13.4°C, pack light summer clothing plus a thin layer for evenings.
What to do in Nairobi in September
September's weather suits sightseeing through the day. Top sights:
Nairobi in September — FAQs
What is the weather like in Nairobi in September?
In September, Nairobi averages daytime highs of 25.1°C and overnight lows around 13.4°C, with roughly 7 rainy days and about 34 mm of rain across the month. Good — comfortable — manageable 25.1°C days.
Is September a good time to visit Nairobi?
Good — comfortable. September is comfortable enough for full-day sightseeing in Nairobi. Among Kenya's cities, Nairobi is the 5th hottest this month.
What should I pack for Nairobi in September?
For September (13.4–25.1°C), pack light summer clothing plus a thin layer for evenings.
What is there to do in Nairobi in September?
Nairobi's main sights include Nairobi National Park, Mount Longonot, Karen Blixen Museum, Nairobi National Museum. The weather suits visiting these comfortably through the day.
Nairobi weather by month: