Climate and monthly weather forecastBomi, Sierra Leone

The climate of Bomi

Bomi, located in Sierra Leone, is governed by an Am category climate, as per the Köppen climate classification. This category characterizes a Tropical monsoon climate, marked by heavy seasonal rains, high temperatures, and substantial humidity throughout the year.

In Bomi, monthly average temperatures typically range from a high of 36.3°C (97.3°F) in February to lows of 21.3°C (70.3°F) in August, maintaining an intense humid heat all year round. Native to a Tropical monsoon climate, Bomi undergoes a shift from a considerable rainfall of 296mm (11.65") in August to the lowest of 8mm (0.31") in January. Correspondingly, the number of rainfall days also varies, reaching a peak of around 30 days during August, and tapering to approximately 5.8 days in January.

Humidity and cloud coverage in Bomi maintain a consistent pattern, generally synchronized with the rainfall. With a relative humidity level oscillating from 65% in January to 93% in August, and cloud cover ranging from 25% in January to 87% in August, Bomi remains predominantly cloudy and humid, especially during the monsoon. Sunshine hours register a significant decrease amidst the monsoon, reaching a mere 0.4 days in August while demonstrating a maximum of 22.1 days in January.

The best time to visit Bomi

Visiting Bomi can be particularly ideal between the months of November to January when the region experiences the least amount of rainfall. With only 10mm (0.39") in December and minimal rainfall days, these months offer the perfect ambience for outdoor activities. Sunshine duration enhances to about 19.4 days in November, coupled with a high UV index of 6 to 7, offering bright days for sightseeing and exploring.

The worst time to visit Bomi

Travelling to Bomi during the monsoon, primarily between June to September, might pose challenges. With rainfall surging to as much as 296mm (11.65") in August over approximately 30 days, the city can experience considerable flooding. Coupled with a sizable decline in sunshine hours and a surge in humidity and cloudiness, these months might pose discomfort and hinder travel plans.

Spring weather in Bomi

Spring season in Bomi, stretching from March to May, is marked by a gradual increase in rainfall, leading up to the monsoon. With an average high temperature from 36.2°C (97.2°F) in March to 32.7°C (90.9°F) in May, and the low temperature only shifting marginally from 22.3°C (72.1°F) to 22.9°C (73.2°F) the same months, Bomi retains its tropical warmth in spring.

Summer weather in Bomi

Summers in Bomi, encompassing months from June to August, are characterized by the monsoon. With the soaring rainfall level from 171mm (6.73") in June to the peak of 296mm (11.65") in August, and occurring over nearly 30 days each month, Bomi witnesses an intense monsoon period. Yet, the city maintains its tropical warmth with maximum temperatures around 28°C (82.4°F) in June and 27°C (80.6°F) in August, and minimum temperature hovering around 22°C (71.6°F) during these months.

Autumn weather in Bomi

The autumn months in Bomi, from September to November, represent a gradual shift from monsoon to less rainy season. Despite experiencing a decline in rainfall from 260mm (10.24") in September to 104mm (4.09") in November, the city remains moderately humid with a minimum relative humidity of 86%. With temperatures ranging from highs of 28.4°C (83.1°F) in September to 31.3°C (88.3°F) in November, and lows only varying slightly from 21.5°C (70.7°F) to 21.7°C (71.1°F) for these months, Bomi sustains its equitable warmth in autumn.

Winter weather in Bomi

Winter in Bomi, December to February, is mainly dry with minimal rainfall. The city experiences a mere 10mm (0.39") in December, increasing marginally to 13mm (0.51") in February. Correspondingly, the rainfall days drop to an annual low of 8.7 days. With maximum temperatures fluctuating from 32.6°C (90.7°F) in December to 36.3°C (97.3°F) in February, and the minimum temperature shifting from 20.1°C (68.2°F) in December to 21.2°C (70.2°F) in February, Bomi retains its tropical heat even in winters. While sunshine days substantially increase to around 19.4 days in November, the visibility also optimizes to approximately 8km (5mi) during these months, offering clear skies and warm winters.

Weather in January

In Bomi, Sierra Leone, the weather in January can be quite varied. Temperatures can reach up to 34.8°C (94.6°F), setting a balmy stage for the beginning of the year. This month marks the transition into a season packed with more hours of sunshine. Weather in January »

Weather in February

As Bomi transitions from January to February, the temperature sees a slight increase with the highest reaching 36.3°C (97.3°F). This month is characterised by longer daylight hours offering ample time to engage in outdoor activities. Weather in February »

Weather in March

During the month of March, weather conditions in Bomi are noted for a further mild increase in temperature, humidity, and rainfall compared to February. With the thermometer climbing to 36.2°C (97.2°F), one can sense the impending onset of the wetter season. Weather in March »

Weather in April

In April, Bomi experiences a gradual decrease in temperature to 35.4°C (95.7°F) after the peak values of March. The increased cloud coverage from the previous month results in fewer sunshine hours. This period signifies a distinct shift towards wetter conditions in the city. Weather in April »

Weather in May

As May arrives in Bomi, the temperature experiences a more significant drop, down to a high of 32.7°C (90.9°F). This month is renowned for prolific rainfall and high humidity that marks the peak of the wet season. The thick layers of cloud considerably reduce the duration of sunshine hours. Weather in May »

Weather in June

A further dip in temperatures is observed in Bomi during June, accentuating the wet season. The lower temperature of 30.1°C (86.2°F), combined with the year's highest rainfall and humidity, offers an authentic tropical rainforest experience. Weather in June »

Weather in July

In July, Bomi's temperature continues its downward trend to reach a relatively lower value of 28°C (82.4°F). The wet season is in full swing, with rainfall and humidity peaking and the cloud cover at its densest. This period, identified by dominant precipitation records, encourages the growth of the city's lush, green landscape. Weather in July »

Weather in August

During August, Bomi witnesses slightly cooler conditions with the temperature fluctuating around a comfortable 27°C (80.6°F). This month marks the culmination of the wet season with the highest recorded rainfall and highest average humidity. Weather in August »

Weather in September

September implies an initial farewell to the wet season in Bomi. The temperature shows a minor increase to a more pleasant 28.4°C (83.1°F), indicating an impending transition. Although the rainfall and relative humidity begin to subside, September still harbours significant precipitation. Weather in September »

Weather in October

October in Bomi is a transition month with the temperature rising to a warm 30.4°C (86.7°F). The rainfall decreases substantially, ushering in the dry season accompanied by a distinct drop in average humidity. Sunshine hours see an increase, signaling the return of clearer skies. Weather in October »

Weather in November

The month of November in Bomi illustrates the distinct post-monsoon weather transitioning into the dry season. Temperatures continue to rise, climbing to 31.3°C (88.3°F), allowing more warmth and comfort to permeate throughout the day. Weather in November »

Weather in December

December carries the ambience of the dry season in Bomi, with temperature remaining pleasant at 32.6°C (90.7°F). This period sees the least rainfall of the year, symbolizing a well-established dry season. The lowering humidity and sparse cloud cover further validate the dry season's progression. Weather in December »