September weather forecast
Yei, South Sudan

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Weather in September

Gradually shaking off the lingering rains, September in Yei becomes the canvas of nature's beauty with the city at one of its greenest periods. The sunshine hours increase slightly, revealing lively hues of the surroundings. Though the rains persist, the cloud cover and relative humidity begin their descent. Slowly, the city regains its typical weather pattern as the wind speed picks up again, bringing back the freshness in the air. A slight decrease in rainfall to 167mm (6.57") is the first indication of the leaving monsoons.

Temperature

The unfolding of September shows an average high-temperature of a still warm 27.5°C (81.5°F), indicating a slight variance from August's 26.9°C (80.4°F). In Yei, in September, the average low-temperature is an enjoyable 17.5°C (63.5°F).

Heat index

The heat index for September is computed to be a hot 31°C (87.8°F). Enduring exposure and ongoing activity could cause a sense of fatigue and subsequent heat cramps.
Heat index determinations are made taking into account the shade and light air movements. Under direct sunshine, the heat index values might be elevated by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', takes into account both air temperature and humidity to illustrate what people actually feel. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Kids frequently ignore the importance of taking a break and rehydrating. Thirst is a late symptom of dehydration - thus, it is crucial to stay hydrated, especially during long-lasting physical activities.

Humidity

The average relative humidity in September is 81%.

Rainfall

In Yei, South Sudan, during September, the rain falls for 28.9 days and regularly aggregates up to 167mm (6.57") of precipitation. In Yei, during the entire year, the rain falls for 235.5 days and collects up to 1389mm (54.69") of precipitation.

Daylight

The average length of the day in September in Yei is 12h and 8min.
On the first day of September in Yei, sunrise is at 05:51 and sunset at 18:02. On the last day of the month, sunrise is at 05:44 and sunset at 17:49 CAT.

Sunshine

The average sunshine in September is 9.1h.

UV index

The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A maximum high daily UV index of 6 during September translates into the following directions:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Stay in the shade and limit sun exposure from 10 a.m. to 4 p.m., when UV radiation is most potent. Keep in mind that shade structures like parasols or canopies do not offer full protection. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.

Frequently asked questions

What is the temperature in September in Yei?

During September, Yei experiences an average high-temperature of 27.5°C (81.5°F) and a low-temperature of 17.5°C (63.5°F). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, is computed to be 31°C (87.8°F).

What is the average humidity in September in Yei?

In September, the average relative humidity in Yei is 81%.

How much does it rain in Yei in September?

In Yei, South Sudan, in September, it is raining for 28.9 days, with typically 167mm (6.57") of accumulated precipitation.

How many hours of daylight does Yei have in September?

In Yei, the average day length in September is 12h and 8min.

When is the sunrise / sunset in September in Yei?

In September, on the first day of the month, sunrise is at 05:51 and sunset at 18:02. On the last day of the month, in Yei, sunrise is at 05:44 and sunset at 17:49 CAT.

How long on average sun shines in September in Yei?

In Yei, South Sudan, the average sunshine duration in September is 9.1h.

What is the UV index intensity in September in Yei?

In Yei, the average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Yei, South Sudan

Average temperature in September - Yei, South Sudan
  • Average high temperature in September: 27.5°C

The warmest month (with the highest average high temperature) is February (33.4°C).
The month with the lowest average high temperature is July (26.7°C).

  • Average low temperature in September: 17.5°C

The month with the highest average low temperature is February (20.8°C).
The coldest months (with the lowest average low temperature) are July and August (17.1°C).

Average pressure in September
Yei, South Sudan

Average pressure in September - Yei, South Sudan
  • Average pressure in September: 1012.2mbar

The month with the highest atmospheric pressure is July (1013.3mbar).
The month with the lowest atmospheric pressure is February (1008.7mbar).

Average wind speed in September
Yei, South Sudan

Average wind speed in September - Yei, South Sudan
  • Average wind speed in September: 5.5km/h

The windiest month (with the highest average wind speed) is February (8.6km/h).
The calmest month (with the lowest average wind speed) is August (5.3km/h).

Average humidity in September
Yei, South Sudan

Average humidity in September - Yei, South Sudan
  • Average humidity in September: 81%

The month with the highest relative humidity is August (82%).
The month with the lowest relative humidity is January (38%).

Average rainfall in September
Yei, South Sudan

Average rainfall in September - Yei, South Sudan
  • Average rainfall in September: 167mm

The wettest month (with the highest rainfall) is October (226mm).
The driest month (with the least rainfall) is January (3mm).

Average rainfall days in September
Yei, South Sudan

Average rainfall days in September - Yei, South Sudan
  • Average rainfall days in September: 28.9 days

The month with the highest number of rainy days is August (29.7 days).
The month with the least rainy days is January (3.1 days).

Average daylight in September /
Average sunshine in September
Yei, South Sudan

Average daylight in September / Average sunshine in September - Yei, South Sudan
  • Average daylight in September: 12h and 1min

The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 54min).

  • Average sunshine in September: 9h and 1min

The months with the most sunshine are January and February (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 8h and 30min).

Average sunshine days in September
Yei, South Sudan

Average sunshine days in September - Yei, South Sudan
  • Average sunshine days in September: 0.4 days

The month with the most sunshine days is January (27.8 days).
The month with the least sunshine days is August (0.2 days).

Average UV index in September
Yei, South Sudan

Average UV index in September - Yei, South Sudan
  • Average UV index in September: 6

The months with the highest UV index are January, February and December (UV index 7).
The month with the lowest UV index is August (UV index 5).

Average cloud cover in September
Yei, South Sudan

Average cloud cover in September - Yei, South Sudan
  • Average cloud cover in September: 36

The month with the most cloud cover is August (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 10).

Average visibility in September
Yei, South Sudan

Average visibility in September - Yei, South Sudan
  • Average visibility in September: 8km

The months with the highest visibility are January, February, March and December (10km).
The months with the lowest visibility are July, August, September and October (8km).

Yei, South Sudan

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