Climate and monthly weather forecastYonibana, Sierra Leone
Climate and monthly weather forecast
The climate of Yonibana
Located in Sierra Leone, Yonibana falls under Am Köppen climate classification featuring a predominantly tropical monsoon climate. This climate classification is distinguished by its hefty rainfall during the wet months accompanied by a shorter dry period. Yonibana's climate conditions stay quite stable throughout the year, with annual temperatures keeping on a higher scale from 19.8°C (67.6°F) to 38.3°C (100.9°F), exhibiting both the hot nature of this region and its tropical character. Yonibana experiences its highest temperatures between February and May, with a peak temperature of 38.3°C (100.9°F) in March.Relative humidity remains on the higher end throughout the year with levels fluctuating between 60% in February to 93% in August, coupled with overall average cloud coverage ranging from 16% in January up to 84% in August. This goes hand in hand with the perception of a tropical climate, with high humidity levels signifying the moisture-laden air and the increased cloud cover indicating the regular bouts of precipitation received.
Rainfall throughout the year is inconsistent, with distinct dry and wet seasons. From January to March, rainfall remains comparatively low, taking a huge leap in April, peaking at 299mm (11.77") in August, and finally tapering off in November and December reaching only 4mm (0.16"). A pattern that clearly displays a monsoon climate behavior. Yonibana also displays wind modes shifting between 3.3km/h (2.1mph) in November going to 5.7km/h (3.5mph) in April and July, while daylight hours seldom vary, hovering around 12 hours, and sunshine hours diminish considerably from 9.8 hours in January to 3.6 hours in August.
The best time to visit Yonibana
When considering weather conditions for travel plans, the months of December through February emerge as the optimal period to visit Yonibana. These are the months when temperatures are comparatively cooler, hovering between 19.8°C (67.6°F) to 37.8°C (100°F). Rainfall is minimal with rainfall days ranging from 2.2 to 3.4 days per month, meaning that interruptions to outdoor activities will be least. Besides, the proactive sunshine duration of up to 9.8 hours in January and a UV index of 7 offer ample opportunity to partake in outdoor tourist activities.The worst time to visit Yonibana
Contrarily, the period from July to October count as the least favorable for visiting Yonibana. The heavy monsoon precipitation prevalent during these months sees monthly rainfall totals reach staggering heights of 264mm (10.39") to 299mm (11.77"). This is accompanied by an escalated cloud presence and the lowest sunshine hours decreasing to 3.6 hours. Furthermore, the escalated humidity levels ranging from 91% to 93% may be discomforting for many, curtailing outdoor enjoyment.Spring weather in Yonibana
Spring in Yonibana, around March to May, witnesses increasing temperatures up to 38.3°C (100.9°F). While the early spring sees minimal rain, from April the rainfall indices take an upward trend with rainfall reaching up to 51mm (2.01"). Gradually escalating humidity levels start to be noticeable from April, climbing from 61% to 65%, while increasing cloud cover, reducing sunshine hours and increasing daylight hours indicate the transition towards the monsoon.Summer weather in Yonibana
Summer, from June to August, typically displays Yonibana’s monsoon characteristics. Temperatures remain relatively stable from 28.7°C (83.7°F) in June to a low of 27.7°C (81.9°F) in August. High humidity levels peak at 93% in August, aligned with heavy downpour most days, with rainfall totals reaching 299mm (11.77"), and cloud coverage of 84%. Notably, sunshine hours are lowest during this period, bottoming at 3.6 hours in August.Autumn weather in Yonibana
The autumn months of September to November observe a gradual dwindling of monsoon characteristics. Although September is relatively wet with 249mm (9.8") of rainfall, by November it significantly decreases to 67mm (2.64"). Temperatures start to rise, with an average of 30.7°C (87.3°F) in September to 31.6°C (88.9°F) in November, while relative humidity and cloud coverage also decrease, indicating the transition out of the wet season.Winter weather in Yonibana
Winter months in Yonibana, from December to February form the dry phase in Yonibana's tropical monsoon climate. Temperatures range between 19.8°C (67.6°F) to 37.8°C (100°F), supporting pleasant weather. Rainfall in these months is scanty, reaching a paltry 3mm (0.12") to 5mm (0.2"), and the humidity drops to 60% - 67%. Simultaneously, high sunshine hours of up to 9.8 in January provide ideal conditions for outdoor exploration.Weather in January
The start of the year in Yonibana, Sierra Leone experiences a mild climate with consistently sunny days. January marks the start of the dry season, which sees less frequent rainfall and lower humidity levels. While enjoying 11.7 hours of daylight each day, residents also get to bask in sunshine for nearly 9.8 hours. Weather in January »Weather in February
February in Yonibana, Sierra Leone, continues the weather pattern of January, yet subtly enters higher temperature ranges. Precipitation remains at a minimum and the land remains relatively dry. The daylight increases slightly, and there's an almost unnoticeable shift in the sunlight hours. Weather in February »Weather in March
March still maintains the earlier months' dry and warm pattern, though begins hinting at the upcoming rainy season. It gives way to the year’s first increase in rainfall, signaling the gradual change in the weather pattern. The increase in the average lows, from 21.1°C (70°F) to 22.9°C (73.2°F), indicates an upward temperature swing. Weather in March »Weather in April
April ushers in not only a noticeable rise in rainfall but also an increase in humidity. The shift from dry to wet season is ushered in by the highest increase in rainfall the city sees all year. Rainfall leaps up from 23mm (0.91") in March to 51mm (2.01"). Weather in April »Weather in May
In contrast to the preceding months, May in Yonibana, Sierra Leone sees weather that could be termed as excessively rainy. More significant changes become apparent in May, marking the middle of the rainy season. There's a noticeable drop in the average high temperature down to 34.3°C (93.7°F), coupled with an uptick in humidity up to 79%. Weather in May »Weather in June
As the rainy season advances in Yonibana, Sierra Leone, June is defined by even cooler temperatures. This is a time when the grayness of the skies begins to persist for long. The ample amount of rainfall offers relief from the sweltering heat experienced in the earlier months. Weather in June »Weather in July
In Yonibana, Sierra Leone, July is characterized as the peak of the rainy season. The temperature continues to decline slightly, making the city a bit cooler than before. Patches of blue sky are rare with clouds dominating the weather scene. Weather in July »Weather in August
August in Yonibana, Sierra Leone continues the weather trend of July. The rain is a constant companion during this time, ensuring the city stays lush green and vibrant. It’s a slight tweaking of July's weather pattern, remaining synonymous with cloudy, overcast skies. Weather in August »Weather in September
The rainfall recedes slightly in September in Yonibana, Sierra Leone, which witnesses a marginal decrease in average highs and lows as well. It's a mirror version of August with subtly changing weather variables. The humidity is still at the higher end of the scale, and the sun is seldom visible. Weather in September »Weather in October
The arrival of October in Yonibana, Sierra Leone indicates the end of the rainy season, with the precipitation volume gradually tapering off. The sky starts clearing up, and the sun becomes a more regular feature. Drying signs are unmistakable as water levels fall and the cloud cover recedes. Weather in October »Weather in November
November usher's in Yonibana, Sierra Leone’s drier weather as rainfall reaches its second lowest level at 67mm (2.64"). The decline in rain from October to November is quite large, which allows more sunlight to reach the surface. Weather in November »Weather in December
Yonibana, Sierra Leone welcomes December with open skies and a lot more sunshine than the previous months. As the sun regains its dominion over the skies, the temperatures begin to rise yet do not reach the year's maximum. Rainfall is at its lowest in the year at 4mm (0.16"), pointing to a return of the dry season. 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
January is the month with the least rainfall. Rain falls for 2.2 days and accumulates 3mm (0.12") of precipitation.
In Yonibana, during the entire year, the rain falls for 228.1 days and collects up to 1418mm (55.83") of precipitation.
With an average of 9.8h of sunshine, January has the most sunshine of the year.
January through May, November and December, with an average maximum UV index of 7, are months with the highest UV index.
The least humid month is February, with an average relative humidity of 60%.
March is the month that records the highest temperatures, with averages ranging from a high of 38.3°C (100.9°F) to a low of 22.9°C (73.2°F).
June has the longest days of the year, with an average of 12h and 36min of daylight.
July and August, with an average maximum UV index of 5, are months with the lowest UV index.
In Yonibana, August is the coldest month, with temperatures averaging a high of 27.7°C (81.9°F) and a low of 21.8°C (71.2°F).
With an average relative humidity of 93%, August is the most humid month.
The month with the most rainfall is August, when the rain falls for 29.5 days and typically aggregates up to 299mm (11.77") of precipitation.
August has the least sunshine of the year, with an average of 3.6h of sunshine.
With an average of 11h and 36min of daylight, December has the shortest days of the year.
Yonibana does not observe Daylight Saving Time (DST). GMT timezone is used throughout the entire year.
Average temperature
Yonibana, Sierra Leone
The warmest month (with the highest average high temperature) is March (38.3°C).
The month with the lowest average high temperature is August (27.7°C).
The month with the highest average low temperature is April (24°C).
The coldest month (with the lowest average low temperature) is January (19.8°C).
Average pressure
Yonibana, Sierra Leone
- Average pressure in January:
1011.4mbar - Average pressure in February:
1010.5mbar - Average pressure in March:
1010.5mbar - Average pressure in April:
1010.6mbar - Average pressure in May:
1011.8mbar - Average pressure in June:
1013.5mbar
- Average pressure in July:
1014mbar - Average pressure in August:
1013.7mbar - Average pressure in September:
1013.1mbar - Average pressure in October:
1011.9mbar - Average pressure in November:
1011.2mbar - Average pressure in December:
1011.4mbar
The month with the highest atmospheric pressure is July (1014mbar).
The months with the lowest atmospheric pressure are February and March (1010.5mbar).
Average wind speed
Yonibana, Sierra Leone
- Average wind speed in January:
4.1km/h - Average wind speed in February:
4.7km/h - Average wind speed in March:
5.6km/h - Average wind speed in April:
5.7km/h - Average wind speed in May:
5.1km/h - Average wind speed in June:
5.1km/h
- Average wind speed in July:
5.7km/h - Average wind speed in August:
5.8km/h - Average wind speed in September:
4.8km/h - Average wind speed in October:
3.8km/h - Average wind speed in November:
3.3km/h - Average wind speed in December:
3.5km/h
The windiest month (with the highest average wind speed) is August (5.8km/h).
The calmest month (with the lowest average wind speed) is November (3.3km/h).
Average humidity
Yonibana, Sierra Leone
The month with the highest relative humidity is August (93%).
The month with the lowest relative humidity is February (60%).
Average rainfall
Yonibana, Sierra Leone
The wettest month (with the highest rainfall) is August (299mm).
The driest month (with the least rainfall) is January (3mm).
Average rainfall days
Yonibana, Sierra Leone
- Average rainfall days in January:
2.2 days - Average rainfall days in February:
3.4 days - Average rainfall days in March:
11.6 days - Average rainfall days in April:
17.1 days - Average rainfall days in May:
24.9 days - Average rainfall days in June:
26.8 days
- Average rainfall days in July:
29.9 days - Average rainfall days in August:
29.5 days - Average rainfall days in September:
28.8 days - Average rainfall days in October:
29 days - Average rainfall days in November:
21.5 days - Average rainfall days in December:
3.4 days
The month with the highest number of rainy days is July (29.9 days).
The month with the least rainy days is January (2.2 days).
Average daylight / Average sunshine
Yonibana, Sierra Leone
- Average daylight in January:
11h and 42min - Average daylight in February:
11h and 54min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 18min - Average daylight in May:
12h and 30min - Average daylight in June:
12h and 36min
- Average daylight in July:
12h and 36min - Average daylight in August:
12h and 24min - Average daylight in September:
12h and 12min - Average daylight in October:
11h and 54min - Average daylight in November:
11h and 42min - Average daylight in December:
11h and 36min
The month with the longest days is June (Average daylight: 12h and 36min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in January:
9h and 48min - Average sunshine in February:
9h and 36min - Average sunshine in March:
9h and 24min - Average sunshine in April:
8h and 48min - Average sunshine in May:
7h and 30min - Average sunshine in June:
5h and 54min
- Average sunshine in July:
4h and 24min - Average sunshine in August:
3h and 36min - Average sunshine in September:
5h and 0min - Average sunshine in October:
6h and 48min - Average sunshine in November:
8h and 6min - Average sunshine in December:
9h and 24min
The month with the most sunshine is January (Average sunshine: 9h and 48min).
The month with the least sunshine is August (Average sunshine: 3h and 36min).
Average sunshine days
Yonibana, Sierra Leone
- Average sunshine days in January:
27.8 days - Average sunshine days in February:
24 days - Average sunshine days in March:
18 days - Average sunshine days in April:
10.3 days - Average sunshine days in May:
3.7 days - Average sunshine days in June:
2.8 days
- Average sunshine days in July:
0.7 days - Average sunshine days in August:
0.8 days - Average sunshine days in September:
0.8 days - Average sunshine days in October:
1.2 days - Average sunshine days in November:
5.9 days - Average sunshine days in December:
26.8 days
The month with the most sunshine days is January (27.8 days).
The month with the least sunshine days is July (0.7 days).
Average UV index
Yonibana, Sierra Leone
The months with the highest UV index are January, February, March, April, May, November and December (UV index 7).
The months with the lowest UV index are July and August (UV index 5).
Average cloud cover
Yonibana, Sierra Leone
The month with the most cloud cover is August (Cloud cover 84).
The month with the least cloud cover is January (Cloud cover 16).
Average visibility
Yonibana, Sierra Leone
The months with the highest visibility are March and April (10km).
The month with the lowest visibility is September (5km).
