Climate and monthly weather forecastYei, South Sudan
Climate and monthly weather forecast
The climate of Yei
The climate in Yei, South Sudan solidly classifies in the Tropical wet and dry or savanna zone, according to the Köppen climate classification. Its geographical position straddles the Equator contributing to its tropical climate characterized by high temperatures and substantial rainfall throughout the year.Temperature variations are more subtle rather than severe. Monthly average highs consistently remain in the range of 26.7°C (80.1°F) to 33.4°C (92.1°F), and lows fluctuate between 17.1°C (62.8°F) and 20.8°C (69.4°F). As it may be expected with a Tropical climate, there is a noticeable spike in humidity levels, from an annual low of 38% in January to as high as 82% in August.
The prevailing climatic pattern shows a distinct dry and wet season. Rainfall primarily presents itself from March to November, with a marked increase noticed from April onwards. This period is characterized by an average rainfall level of 100mm (3.94") to 226mm (8.9"). Conversely, the months from December through to February receive significantly less rainfall, recording averages as low as 3mm (0.12") in January and peaking at 43mm (1.69") in March.
The best time to visit Yei
The ideal time to visit Yei is primarily determined by personal preference regarding climate conditions. For those who are seeking drier conditions, the period from December to February is ideal. During these months, average rainfall drops to a minimal 3mm (0.12") in January, coupled with the humidity levels descending to an annual low of 38% in January. Days are filled with copious sunshine, with an average of 9.7 hours in December.The worst time to visit Yei
Visitors who are averse to heavy rainfall and high humidity levels might find the period between May and October less appealing. During this timeframe, the area receives substantial rainfall, peaking at 226mm (8.9") in October, accompanied by high humidity levels, reaching up to 82% in August.Spring weather in Yei
Spring in Yei, observed from March to May, is characterized by an escalation in rainfall and humidity levels. Rainfall averages surge from 43mm (1.69") in March to 177mm (6.97") in May, accompanied by a significant increase in humidity levels, rising from 54% to 78% during the same period. Average temperatures fluctuate within a narrow range from 29.7°C (85.5°F) to 33.4°C (92.1°F) for the highs and 19.3°C (66.7°F) to 20.8°C (69.4°F) for the lows.Summer weather in Yei
The summer months, June through August, in Yei are dominated by substantial rainfall and high humidity. Average rainfall ranges from 164mm (6.46") to 194mm (7.64") during these months, while humidity levels fluctuate in the high 70s and the low 80s% range. Visitors can expect moderate temperatures with highs oscillating from 26.7°C (80.1°F) to 27.4°C (81.3°F) and lows from 17.1°C (62.8°F) to 17.6°C (63.7°F).Autumn weather in Yei
Autumn months in Yei, September to November, continue with the trend of significant rainfall. Rainfall averages drop gradually from 167mm (6.57") in September to 108mm (4.25") in November. Average high temperatures fall slightly with a range from 27.2°C (81°F) to 27.8°C (82°F), while lows maintain relative uniformity from 17.5°C (63.5°F) to 18.1°C (64.6°F).Winter weather in Yei
The season transitions into winter, observed from December to February, with significant changes in weather conditions in Yei. Rainfall dramatically plummets to 22mm (0.87") in December and a minimal 3mm (0.12") in January. Average high temperatures range between 29.9°C (85.8°F) and 32.5°C (90.5°F), while lows vary from 18.5°C (65.3°F) to 20.8°C (69.4°F) during this period. This season emerges as the driest time of the year with a noticeably lower humidity level, reaching its lowest at 38% in January.Weather in January
In Yei, South Sudan, January signals the onset of the dry season with dwindling rainfall and relatively mild temperatures. Sunshine prevails with nearly 10 hours per day, ensuring plenty of opportunities to soak in the sun's warmth. Weather in January »Weather in February
Transitioning from January, February continues to see reduced rainfall and warm temperatures throughout the month. The UV index maintains a steady value, urging visitors to don their sunglasses and sun hats. It is a perfect time to bask in the Yei sun, with sunshine hours and daylight averaging around 12 hours. Weather in February »Weather in March
As the sun climbs higher in the sky, March marks a shift in weather patterns, preparing Yei for the upcoming wet season. While the temperatures remain enjoyable, the cloud cover significantly increases, providing stunning sceneries at sunrise and sunset. Weather in March »Weather in April
April in Yei is characterized by a distinct increase in downpour as the wet season settles in. The city transitions under the increasing cloud cover, casting softer shadows. As the showers increase, residents and visitors adapt their schedules to enjoy the intermittent sunshine. Weather in April »Weather in May
May brings the charm of full-blown monsoons to Yei, creating a mosaic of green landscapes. The residents adapt their schedule to ensure ample time indoors, amidst the heavy rainfall. An amplified level of humidity and cloud cover blankets the city, transforming it into a watercolor painting. Weather in May »Weather in June
June stands as a testament to the draining effects of ceaseless rainfall in Yei. The cooler weather allows for casual afternoon siestas and rounds of steaming hot tea. The cloud cover and humidity reach their annual high, turning the city into a surreal rain-drenched spectacle. Weather in June »Weather in July
Maintaining the monsoon serenade, July ensures Yei gets its fair share of rainy spells during the year. Cloud-laden skies and persistent rains define the city's weather, making it considerably less sunny. The UV index dips marginally, providing respite to the population and vegetation alike. Weather in July »Weather in August
August in Yei reveals the effects of continued rain with lush greenery spreading across landscapes. Though sunshine takes a back seat, the city remains alight with daylight hours sustaining at 12.2 hours on average. Despite the high humidity and rather low temperatures, the cloud cover makes August a visually delightful month. Weather in August »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. Weather in September »Weather in October
October offers Yei residents some respite from the extended wet season with a gradual transition towards drier days. Appearing after prolonged rains, the sun feels extra sweet, warming up the temperate city. Overall, the city readies itself for a change in the descending rainfall, lower cloud cover, and slowly rising wind speeds. Weather in October »Weather in November
By November, Yei shows off a perfect balance between sunshine and showers, creating a delightful weather pattern. The relative humidity continues to drop, invigorating the pleasantly warm days and cool nights with fresh air. The visibly reduced rainfall and wind speed signal the nearing dry season. Weather in November »Weather in December
December in Yei marks the full onset of the dry season with a significant reduction in rainfall and milder temperatures. The increased wind gusts bring back the freshness to the warming city, making outdoor activities enjoyable again. Weather in December »Updated: Aug 30, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
With an average relative humidity of 38%, January is the least humid month.
The month with the least rainfall is January, when the rain falls for 3.1 days and typically collects 3mm (0.12") of precipitation.
In Yei, during the entire year, the rain falls for 235.5 days and collects up to 1389mm (54.69") of precipitation.
January and February, with an average of 9.9h of sunshine, are months with the most sunshine.
The months with the highest UV index are January, February and December, with an average maximum UV index of 7.
Yei's February weather reaches an average high of 33.4°C (92.1°F) and an average low of 20.8°C (69.4°F), making it the warmest month.
June has the longest days of the year, with an average of 12h and 24min of daylight.
Yei's coldest temperatures are experienced in July, with average high temperatures of 26.7°C (80.1°F) and lows of 17.1°C (62.8°F).
The most humid month in Yei is August, with an average relative humidity of 82%.
The month with the least sunshine is August, with an average of 8.5h of sunshine.
The month with the lowest UV index is August, with an average maximum UV index of 5.
October is the month with the most rainfall. Rain falls for 28.6 days and accumulates 226mm (8.9") of precipitation.
December has the shortest days of the year, with an average of 11h and 54min of daylight.
Yei, South Sudan, does not observe Daylight Saving Time (DST). CAT timezone is used over the entire year.
Average temperature
Yei, South Sudan
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).
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
Yei, South Sudan
- Average pressure in January:
1010mbar - Average pressure in February:
1008.7mbar - Average pressure in March:
1009.4mbar - Average pressure in April:
1010.5mbar - Average pressure in May:
1011.9mbar - Average pressure in June:
1013.2mbar
- Average pressure in July:
1013.3mbar - Average pressure in August:
1012.8mbar - Average pressure in September:
1012.2mbar - Average pressure in October:
1011mbar - Average pressure in November:
1010.6mbar - Average pressure in December:
1010.5mbar
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
Yei, South Sudan
- Average wind speed in January:
8km/h - Average wind speed in February:
8.6km/h - Average wind speed in March:
8.4km/h - Average wind speed in April:
8km/h - Average wind speed in May:
6.7km/h - Average wind speed in June:
6.1km/h
- Average wind speed in July:
5.5km/h - Average wind speed in August:
5.3km/h - Average wind speed in September:
5.5km/h - Average wind speed in October:
6km/h - Average wind speed in November:
6.3km/h - Average wind speed in December:
6.9km/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
Yei, South Sudan
The month with the highest relative humidity is August (82%).
The month with the lowest relative humidity is January (38%).
Average rainfall
Yei, South Sudan
- Average rainfall in January:
3mm - Average rainfall in February:
12mm - Average rainfall in March:
43mm - Average rainfall in April:
109mm - Average rainfall in May:
177mm - Average rainfall in June:
164mm
- Average rainfall in July:
164mm - Average rainfall in August:
194mm - Average rainfall in September:
167mm - Average rainfall in October:
226mm - Average rainfall in November:
108mm - Average rainfall in December:
22mm
The wettest month (with the highest rainfall) is October (226mm).
The driest month (with the least rainfall) is January (3mm).
Average rainfall days
Yei, South Sudan
- Average rainfall days in January:
3.1 days - Average rainfall days in February:
4.5 days - Average rainfall days in March:
13.4 days - Average rainfall days in April:
21.5 days - Average rainfall days in May:
26.5 days - Average rainfall days in June:
25.8 days
- Average rainfall days in July:
28.3 days - Average rainfall days in August:
29.7 days - Average rainfall days in September:
28.9 days - Average rainfall days in October:
28.6 days - Average rainfall days in November:
18.3 days - Average rainfall days in December:
6.9 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 / Average sunshine
Yei, South Sudan
- Average daylight in January:
11h and 54min - Average daylight in February:
12h and 0min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 12min - Average daylight in May:
12h and 18min - Average daylight in June:
12h and 24min
- Average daylight in July:
12h and 18min - Average daylight in August:
12h and 12min - Average daylight in September:
12h and 6min - Average daylight in October:
12h and 0min - Average daylight in November:
11h and 54min - Average daylight in December:
11h and 54min
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 January:
9h and 54min - Average sunshine in February:
9h and 54min - Average sunshine in March:
9h and 36min - Average sunshine in April:
9h and 0min - Average sunshine in May:
8h and 42min - Average sunshine in June:
8h and 42min
- Average sunshine in July:
8h and 36min - Average sunshine in August:
8h and 30min - Average sunshine in September:
9h and 6min - Average sunshine in October:
8h and 42min - Average sunshine in November:
9h and 12min - Average sunshine in December:
9h and 42min
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
Yei, South Sudan
- Average sunshine days in January:
27.8 days - Average sunshine days in February:
22.1 days - Average sunshine days in March:
15.3 days - Average sunshine days in April:
5.8 days - Average sunshine days in May:
2.4 days - Average sunshine days in June:
1.8 days
- Average sunshine days in July:
1.8 days - Average sunshine days in August:
0.2 days - Average sunshine days in September:
0.4 days - Average sunshine days in October:
1.5 days - Average sunshine days in November:
9.3 days - Average sunshine days in December:
23.3 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
Yei, South Sudan
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
Yei, South Sudan
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
Yei, South Sudan
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).
