Climate and monthly weather forecastYana, Sierra Leone
Climate and monthly weather forecast
The climate of Yana
Nestled in Sierra Leone, Yana is characterised by the Aw Köppen climate classification, indicating a typical tropical weather profile. The region experiences an interesting blend of the wet and dry savanna climate.Throughout the year, the temperature in Yana shows a slight fluctuation. It peaks at roughly 39°C (102.2°F) in March and dips to about 26.8°C (80.2°F) in August. The lowest recorded temperatures lie between 18.1°C (64.6°F) and 22.8°C (73°F) from January to December, making it a relatively warm region year-round.
Humidity follows a steady pattern in Yana, with a moderate 43% in January escalating to a peak of 94% by August. Rainfall, too, presents an interesting trend. A scant 1mm (0.04") in the dry months of January and February is replaced by a torrent of up to 436mm (17.17") in the height of monsoon, August. The number of wet days in these periods mirrors the rainfall, starting from just a single day in January up to nearly the entire month in August.
Almost a direct opposite, sunshine hours decrease as rainfall increases, from around 9.9 hours per day in January to just 3.8 hours in August. The greatest percentage of cloud cover follows this trend, revealing an increase from January to August.
The best time to visit Yana
Given the weather patterns, the key to selecting an optimal time to visit Yana is in aligning individual preferences with the climate's rhythms. The months from November through February present the most appealing weather conditions for most tourists. With high temperatures ranging from 32°C (89.6°F) to 37.7°C (99.9°F), and averaging 9.9 hours of sunlight, these months also see minimal rainfall, less than 10mm (0.39") collectively. This should make for comfortable sightseeing and travel.The worst time to visit Yana
The months of June, July, and August may be the most challenging time to visit Yana. In this period, the city experiences its highest rainfall, with August receiving a massive 436mm (17.17") spread over virtually every day of the month. Simultaneously, sunshine hours reduce significantly, averaging between 3.8 hours and 4.9 hours a day. Hence, these months may not offer optimal conditions for sightseeing or outdoor activities.Spring weather in Yana
Using the seasonal calendar, although not perfectly in line with temperate regions, Yana sees the start of the rain in March, which can be likened to a tropical version of spring. From March through May, temperatures vary between 35.2°C (95.4°F) to 39.2°C (102.6°F) during the day and 20°C (68°F) to 22.8°C (73°F) at night. Rainfall increases steadily from 7mm (0.28") to 127mm (5") with an increase in wet days from nearly 6 to 24 days. While humidity rises, sunshine hours decline from 9.6 to 8.6.Summer weather in Yana
Tropical summer in Yana stretches from June to September. This season sees the heaviest rainfall, ranging from 231mm (9.09") to 436mm (17.17"), with almost every day being a wet day. Temperatures slip down to a range of 26.8°C (80.2°F) to 31.2°C (88.2°F) during the day and 20.8°C (69.4°F) to 22°C (71.6°F) at night, making it cooler than the preceding months. The amount of sunlit hours is also lower, between 3.8 and 5.7 hours per day.Autumn weather in Yana
Yana's version of autumn transpires from October to November. A decrease in rainfall from 177mm (6.97") to 58mm (2.28") commences the end of the rainy season. With dropping humidity levels, the number of clear sky days increases. Temperatures remain enjoyable from 30.5°C (86.9°F) to 32°C (89.6°F) during the day and 20.8°C (69.4°F) to 20.4°C (68.7°F) at night.Winter weather in Yana
The months of December, January and February represent Yana's dry season or its tropical equivalent of winter. With humidity at the year's lowest, between 43% and 51%, and virtually no rainfall, weather conditions are optimal for outdoor activities. Day temperatures hover between 33.4°C (92.1°F) and 35.4°C (95.7°F), while nights cool down to between 18.1°C (64.6°F) and 20°C (68°F). Sunshine hours peak at 9.9 hours per day, offering plenty of natural light for day trips.Weather in January
The arrival of the New Year brings mild weather conditions to Yana, Sierra Leone. A touch cooler than the preceding month - December, January experiences a decrease in temperature, becoming distinctly more pleasant. This month is associated with comparatively clear skies, considerably less rainfall, and serene winds. Weather in January »Weather in February
Progressing towards February, the weather conditions in Yana continue on the dry and pleasant trajectory established in January. The temperature progressively increments, slightly pushing the upper temperature limit. Notwithstanding the increase in temperature, the weather remains comfortable, courtesy of the stable wind flow and decreasing rainfall. Weather in February »Weather in March
Navigating into March, the temperature in Yana continues its ascent, signifying a trend towards warmer conditions. The meteorological scenario shifts from the dry spells of the previous couple of months to a gradual resurgence of wet conditions. Weather in March »Weather in April
As April steps in, Yana continues to heat up with the increasing temperature trend persisting from March. The climate exhibits a significant inclination towards wetter conditions, delineated by an increase in rainfall and relative humidity. Weather in April »Weather in May
Yana steps into full-blown wet season transition in May. The temperatures decrease slightly compared to previous monthe - April, yet the humidity levels soar. A stark contrast to the dry conditions of the initial months of the year, a marked increase in rainfall characterizes May. Weather in May »Weather in June
June sees the continuation of the wet season in Yana. However, a steep decrease in the daily sunshine hours transpires, resulting in shorter days. The temperature follows an overall decreasing trend, which offsets the increased humidity. Weather in June »Weather in July
July in Yana features persistent rainfall, along with a plunge in the daily sunshine hours to the lowest in the year. This month is characterized by wet, overcast conditions, a further drop in temperature, and an escalation in the relative humidity. Weather in July »Weather in August
August replicates the meteorological characteristics of July, with continuous rainfall, overcast skies, and high humidity. Considerably cloudy conditions and decreased daily sunshine hours are hallmarks of this month. August surpasses all the previous months, recording the highest rainfall of the year going from 360mm (14.17") in July to 436mm (17.17") in August. Weather in August »Weather in September
September signifies the onset of the wet season's end in Yana, with the weather conditions starting to improve. The rainfall experiences a decrement compared to August, although the level of precipitation remains significantly high. Weather in September »Weather in October
October in Yana symbolizes a distinct departure from the wet season towards drier conditions. A decline in the average temperature in comparison to September reassures more comfortable weather. The month also sees a decrease in rainfall levels along with an increase in sun exposure, inviting more pleasant days. Weather in October »Weather in November
November embarks on the holiday season in Yana, accompanied by a considerable improvement in weather conditions. The city experiences a reduction in rainfall, an increase in daily sunshine hours, and a decrease in relative humidity. Weather in November »Weather in December
December marks the end of the year in Yana, offering weather conditions somewhat similar to the beginning of the year. There is a decrease in overall temperature and relative humidity, along with a significant decline in rainfall compared to November. Weather in December »Updated: Jan 27, 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 43%, January is the least humid month.
The months with the least rainfall in Yana are January and February Rain falls for 1.1 days and accumulates 1mm (0.04") of rain.
Throughout the year, there are 209.7 rainfall days, and 1688mm (66.46") of precipitation is accumulated.
The months with the most sunshine are January through March and December, with an average of 9.9h of sunshine.
January through April and November, with an average maximum UV index of 7, are months with the highest UV index in Yana.
The warmest period tends to be March, when average temperatures fluctuate between a high of 39.2°C (102.6°F) and a low of 20°C (68°F).
The month with the longest days is June, with an average of 12h and 42min of daylight.
July and August, with an average maximum UV index of 5, are months with the lowest UV index in Yana, Sierra Leone.
August is the month that records the lowest temperatures in Yana, with averages ranging from a high of 26.8°C (80.2°F) to a low of 20.9°C (69.6°F).
The most humid month in Yana is August, with an average relative humidity of 94%.
August is the month with the most rainfall in Yana. Rain falls for 30.8 days and accumulates 436mm (17.17") of precipitation.
With an average of 3.8h of sunshine, August has the least sunshine of the year in Yana.
December has the shortest days of the year, with an average of 11h and 36min of daylight.
Yana does not observe Daylight Saving Time (DST). GMT timezone is used throughout the entire year.
Average temperature
Yana, Sierra Leone
The warmest month (with the highest average high temperature) is March (39.2°C).
The month with the lowest average high temperature is August (26.8°C).
The month with the highest average low temperature is May (22.8°C).
The coldest month (with the lowest average low temperature) is January (18.1°C).
Average pressure
Yana, Sierra Leone
- Average pressure in January:
1011.7mbar - Average pressure in February:
1010.7mbar - Average pressure in March:
1010.5mbar - Average pressure in April:
1010.5mbar - Average pressure in May:
1011.8mbar - Average pressure in June:
1013.5mbar
- Average pressure in July:
1014mbar - Average pressure in August:
1013.6mbar - Average pressure in September:
1013.1mbar - Average pressure in October:
1012mbar - Average pressure in November:
1011.4mbar - Average pressure in December:
1011.7mbar
The month with the highest atmospheric pressure is July (1014mbar).
The months with the lowest atmospheric pressure are March and April (1010.5mbar).
Average wind speed
Yana, Sierra Leone
- Average wind speed in January:
4.8km/h - Average wind speed in February:
5.1km/h - Average wind speed in March:
5.4km/h - Average wind speed in April:
5.5km/h - Average wind speed in May:
5km/h - Average wind speed in June:
4.3km/h
- Average wind speed in July:
4.4km/h - Average wind speed in August:
4.5km/h - Average wind speed in September:
4km/h - Average wind speed in October:
3.4km/h - Average wind speed in November:
3.5km/h - Average wind speed in December:
4.3km/h
The windiest month (with the highest average wind speed) is April (5.5km/h).
The calmest month (with the lowest average wind speed) is October (3.4km/h).
Average humidity
Yana, Sierra Leone
The month with the highest relative humidity is August (94%).
The month with the lowest relative humidity is January (43%).
Average rainfall
Yana, Sierra Leone
The wettest month (with the highest rainfall) is August (436mm).
The driest months (with the least rainfall) are January and February (1mm).
Average rainfall days
Yana, Sierra Leone
- Average rainfall days in January:
1.1 days - Average rainfall days in February:
0.8 days - Average rainfall days in March:
5.9 days - Average rainfall days in April:
11 days - Average rainfall days in May:
24.2 days - Average rainfall days in June:
28.6 days
- Average rainfall days in July:
30.2 days - Average rainfall days in August:
30.8 days - Average rainfall days in September:
29.7 days - Average rainfall days in October:
29 days - Average rainfall days in November:
15.7 days - Average rainfall days in December:
2.7 days
The month with the highest number of rainy days is August (30.8 days).
The month with the least rainy days is February (0.8 days).
Average daylight / Average sunshine
Yana, Sierra Leone
- Average daylight in January:
11h and 36min - Average daylight in February:
11h and 48min - Average daylight in March:
12h and 6min - Average daylight in April:
12h and 18min - Average daylight in May:
12h and 36min - Average daylight in June:
12h and 42min
- 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 42min).
The month with the shortest days is December (Average daylight: 11h and 36min).
- Average sunshine in January:
9h and 54min - Average sunshine in February:
9h and 54min - Average sunshine in March:
9h and 54min - Average sunshine in April:
9h and 36min - Average sunshine in May:
8h and 36min - Average sunshine in June:
6h and 36min
- Average sunshine in July:
4h and 54min - Average sunshine in August:
3h and 48min - Average sunshine in September:
5h and 42min - Average sunshine in October:
8h and 6min - Average sunshine in November:
9h and 30min - Average sunshine in December:
9h and 54min
The months with the most sunshine are January, February, March and December (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 3h and 48min).
Average sunshine days
Yana, Sierra Leone
- Average sunshine days in January:
29.7 days - Average sunshine days in February:
26.4 days - Average sunshine days in March:
23.8 days - Average sunshine days in April:
16.5 days - Average sunshine days in May:
5.3 days - Average sunshine days in June:
0.7 days
- Average sunshine days in July:
0.6 days - Average sunshine days in August:
0.1 days - Average sunshine days in September:
0.1 days - Average sunshine days in October:
0.6 days - Average sunshine days in November:
10.5 days - Average sunshine days in December:
27.5 days
The month with the most sunshine days is January (29.7 days).
The months with the least sunshine days are August and September (0.1 days).
Average UV index
Yana, Sierra Leone
The months with the highest UV index are January, February, March, April and November (UV index 7).
The months with the lowest UV index are July and August (UV index 5).
Average cloud cover
Yana, Sierra Leone
The month with the most cloud cover is August (Cloud cover 82).
The month with the least cloud cover is February (Cloud cover 9).
Average visibility
Yana, Sierra Leone
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are July, August and September (6km).
