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Average weather for Nairobi in September

It's hot in September in Nairobi with an average temperature of 30°C. Temperatures this month range from a low of 27°C to a high of 31°C. At night, you can expect temperatures between 14°C and 16°C.

Daily Temperature in September in Nairobi

Start of September

The month of September starts in Nairobi with hot temps, averaging around 29°C during the day and nights around 16°C. A few showers might pop up early in the month, but overall, it’ll stay mostly sunny and dry.

With the temperature difference between day and night, it’s smart to wear layers.

Mid September

By mid-September, daytime temps rise to around 31°C, with nights around 15°C. Not much precipitation expected during this period. It’s mostly dry and sunny.

Since it cools down at night, it’s a good idea to wear layers.

End of September

By the end of September, the average daytime temperature in Nairobi is around 31°C, while nighttime temps are about 16°C. There’s hardly any chance of precipitation. The weather will be mostly dry with plenty of sun.

Because temperatures drop in the evening, wearing layers is recommended.

In September, there is an average of 30 mm of precipitation, spread over 5 days. The wind speed is around 4 Bft, mostly coming from the Southeast.

Nairobi in September

New York
Temperature Average temperature
30°C 27°C
Sun Max. temperature
31°C 31°C
Sun Min. temperature
27°C -5°C
Rain Total precipitation
30 mm 57 mm
Rain Rainy days
5 days 9 days

UV index

The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.

Is September a good time to visit Nairobi?

September is a good month to be in Nairobi for sunny weather. You’ll have high temperatures and not too much rain.

Temperature records

With 35°C in 2021, Nairobi reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 15°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 9°C to a highest value of 22°C.

Check out the climate of Nairobi for all months and discover the best travel time

Curious about the weather in other parts of Kenya? Check out the climate and weather for spots like Masai Mara National Reserve, Mombasa, Lake Nakuru National Park, or explore other destinations in Kenya.

Daily Temperature in September in Nairobi

This chart shows the average daily high and low temperatures in September for Nairobi, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.

Daily Temperature in September in Nairobi

Daily Precipitation in September in Nairobi

The chart below shows the average daily precipitation in September for Nairobi, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.

A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 5 days of precipitation in Nairobi.

Daily Precipitation in September in Nairobi

Daily UV index in September in Nairobi

This chart shows the average daily UV index in September in Nairobi, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.

Daily UV Index in September in Nairobi

Temperature in September in Nairobi over the years

This chart shows the average temperature in September in Nairobi, measured in degrees Celsius, over the past few years.

Temperature in September in Nairobi Over the Years

Total precipitation in September in Nairobi over the years

This chart shows the average precipitation in September in Nairobi, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.

Precipitation in September in Nairobi over the years

Daily weather in September for Nairobi

Click on any day in September to get detailed info about the usual weather on that day in Nairobi. Check out the historical temperatures and precipitation over the past 10 years on this day.

Weather experiences in September in Nairobi

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Average weather in Nairobi by month

Click on a month below to see detailed weather info for Nairobi. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.


Or check out the climate of Nairobi for all months at once

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