September weather forecastAthi River, Kenya

September

Weather in September

The first month of the spring, September, is still a warm month in Athi River, Kenya, with an average temperature varying between 24.6°C (76.3°F) and 14.2°C (57.6°F).

Temperature

September's onset sees an average high-temperature of a still warm 24.6°C (76.3°F), exhibiting a slight fluctuation from the previous month. September's average low-temperature reading settles at a mild 14.2°C (57.6°F).

Humidity

In September, the average relative humidity is 67%.

Rainfall

In Athi River, during September, the rain falls for 16.5 days and regularly aggregates up to 31mm (1.22") of precipitation. Throughout the year, there are 241.5 rainfall days, and 676mm (26.61") of precipitation is accumulated.

Daylight

The average length of the day in September is 12h and 6min.
On the first day of the month, sunrise is at 06:29 and sunset at 18:34. On the last day of September, sunrise is at 06:18 and sunset at 18:25 EAT.

Sunshine

The average sunshine in September is 9.4h.

UV index

The month with the highest UV index is September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The daily high UV index of 6 during September translates into the following recommendations:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.

Updated: Jul 26, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In September, in Athi River, the average high-temperature is 24.6°C (76.3°F), and the average low-temperature is 14.2°C (57.6°F). In February, the average heat index (a.k.a. 'apparent temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is computed to be 28°C (82.4°F).

In Athi River, the average relative humidity in September is 67%.

In September, the rain falls for 16.5 days. Throughout September, 31mm (1.22") of precipitation is accumulated.

The average day length in September is 12h and 6min.

In September, on the first day of the month, sunrise is at 06:29 and sunset at 18:34. On the last day of the month, sunrise is at 06:18 and sunset at 18:25 EAT.

In September, the average sunshine duration is 9.4h.

The month with the highest UV index is September, with an average maximum UV index of 6.

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

23°C

24.6°C

25.3°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

9.2km/h

9.8km/h

11.9km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average daylight

Average sunshine

Average sunshine days

11.4

10.3

6.5

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Athi River, Kenya

Average high temperature in September: 24.6°C

The warmest month (with the highest average high temperature) is February (27°C).
The month with the lowest average high temperature is June (22.4°C).

Average low temperature in September: 14.2°C

The month with the highest average low temperature is April (15.6°C).
The coldest month (with the lowest average low temperature) is July (12.7°C).

Average pressure in September
Athi River, Kenya

Average pressure in September: 1015.6mbar

The month with the highest atmospheric pressure is July (1016.8mbar).
The months with the lowest atmospheric pressure are February and March (1013.4mbar).

Average wind speed in September
Athi River, Kenya

Average wind speed in September: 9.1km/h

The windiest month (with the highest average wind speed) is February (11.8km/h).
The calmest month (with the lowest average wind speed) is June (6.1km/h).

Average humidity in September
Athi River, Kenya

Average humidity in September: 67%

The month with the highest relative humidity is May (84%).
The month with the lowest relative humidity is February (65%).

Average rainfall in September
Athi River, Kenya

Average rainfall in September: 31mm

The wettest month (with the highest rainfall) is April (125mm).
The driest month (with the least rainfall) is January (28mm).

Average rainfall days in September
Athi River, Kenya

Average rainfall days in September: 16.5 days

The month with the highest number of rainy days is May (27.7 days).
The month with the least rainy days is January (12.3 days).

Average daylight in September /
Average sunshine in September
Athi River, Kenya

Average daylight in September: 12h and 6min

The month with the longest days is December (Average daylight: 12h and 12min).
The month with the shortest days is June (Average daylight: 12h and 0min).

Average sunshine in September: 9h and 24min

The months with the most sunshine are January and February (Average sunshine: 9h and 36min).
The months with the least sunshine are April and May (Average sunshine: 8h and 30min).

Average sunshine days in September
Athi River, Kenya

Average sunshine days in September: 10.3 days

The month with the most sunshine days is January (15.3 days).
The month with the least sunshine days is April (1.9 days).

Average UV index in September
Athi River, Kenya

Average UV index in September: 6

The month with the highest UV index is September (UV index 6).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 5).