September Weather in Yei, South Sudan

Last updated: August 31, 2025

In September, the average temperature in Yei, South Sudan is a pleasant 23°C (74°F), with a minimum of 18°C (64°F) and a maximum reaching 31°C (89°F). However, be prepared for considerable rainfall, as 218 mm (8.6 in) typically falls over 25 days, contributing to an average humidity of 84%. Ensure you pack accordingly!

September Temperature in Yei

In September in Yei, the average temperature is 23°C (74°F). The maximum can reach 31°C (89°F) and the minimum can be as low as 18°C (64°F). This pleasant climate makes Yei an ideal destination for travelers seeking a comfortable getaway during this time of year.

September Weather in Yei: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Yei, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Yei, September typically has an average temperature of 23°C (74°F), with highs reaching up to 31°C (89°F) and lows dropping to around 18°C (64°F).

Data source: Temperature data for Yei generated using information from the Copernicus Climate Change Service.

September Precipitation in Yei

In Yei in September, the total precipitation amount is 218 mm (8.6 in) recorded over the course of 25 days.

September Precipitation Trends in Yei

The chart displays monthly precipitation patterns in Yei, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Yei, September typically receives around 218 mm (8.6 inches) of precipitation spread over approximately 25 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Yei

In Yei in September, humidity is 84%. With an average temperature of 23°C (74°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel sticky and heavy, while the air's thickness can be quite exhausting for long periods of travel.

September Average Humidity in Yei

This chart illustrates the average monthly humidity levels in Yei, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Yei is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Yei

In Yei in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Yei.

Maximum UV Index Levels in Yei for September

The chart shows the monthly maximum UV Index (UVI) for Yei in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Yei typically reaches 13, which falls under the extreme exposure category.

Data source: Yei September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Yei Compares to Other Months

Weather in Yei varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Yei, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Yei, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (81°F)	2 mm (0.1 inches)	47%	extreme
February Weather	28°C (83°F)	13 mm (0.5 inches)	33%	extreme
March Weather	27°C (81°F)	53 mm (2.1 inches)	33%	extreme
April Weather	26°C (79°F)	111 mm (4.4 inches)	54%	extreme
May Weather	24°C (76°F)	145 mm (5.7 inches)	77%	extreme
June Weather	23°C (75°F)	130 mm (5.1 inches)	75%	extreme
July Weather	23°C (73°F)	167 mm (6.6 inches)	77%	extreme
August Weather	23°C (73°F)	183 mm (7.2 inches)	79%	extreme
September Weather	23°C (74°F)	218 mm (8.6 inches)	84%	extreme
October Weather	23°C (74°F)	231 mm (9.1 inches)	89%	extreme
November Weather	25°C (76°F)	71 mm (2.8 inches)	88%	extreme
December Weather	26°C (79°F)	20 mm (0.8 inches)	80%	extreme