Climate and monthly weather forecastCacheu, Guinea-Bissau

The climate of Cacheu

Cacheu, a city located in Guinea-Bissau, is predominated by a Köppen classification termed as Aw, which represents a tropical wet and dry or savanna climate. This signifies a weather pattern characterized by consistently high temperatures throughout the year, along with a pronounced dry season. The temperature typically ranges from a low of 21.2°C (70.2°F) to a high of 37.1°C (98.8°F). The lowest temperature is generally observed in January, while the highest normally comes in March.

Humidity levels vary widely from 26% to 81%, with the driest month generally being January and the most humid falling in August. Rainfall varies significantly throughout the year, with the driest months being January and December that virtually see no rainfall. Conversely, the wettest month is August, receiving up to 254mm (10") of rainfall over an average of 27.1 days.

Sea temperatures also exhibit variations, usually ranging between 23.3°C (73.9°F) and 28.7°C (83.7°F). The number of daylight hours range from 11.4 to 12.8 hours, while the amount of sunshine ranges from 5.7 to 9.9 hours. The UV index remains high throughout the year, typically at 7.

The best time to visit Cacheu

For individuals looking for a comfortable climate, particularly tourists, the best period to visit Cacheu extends from November to February. During this time, the city exhibits minimal rainfall, ranging from 0mm (0") to 1mm (0.04"), coupled with lower humidity levels of between 26% and 45%. Despite the reduced humidity and rainfall, the temperature remains relatively high, oscillating between 21.2°C (70.2°F) to 35.3°C (95.5°F), which may offer a pleasant environment for outdoor activities.

The worst time to visit Cacheu

On the other hand, the least favorable time to visit Cacheu extends from June to September. The weather during this period is characterized by high humidity level fluctuating from 65% to 81%, and a substantial amount of rainfall ranging from 32mm (1.26") to 254mm (10"). The temperature, while remaining high, reaches up to 36.7°C (98.1°F) in this season, coupled with heavy rainfall can make it uncomfortable for various outdoor activities.

Spring weather in Cacheu

The spring season, ranging from March to May in the city of Cacheu, is marked by gradually increasing humidity and warmth. The temperature shifts between 22.8°C (73°F) to 37.1°C (98.8°F), creating warm conditions. The rainfall, starting negligible in March at 1mm (0.04"), shows a drastic increase and reaches up to 11mm (0.43") in May with rainy days increasing to 4 from almost half a day in March.

Summer weather in Cacheu

Summer, extending from June to August in Cacheu, is characterized by maximal rainfall and humidity. The temperature remains high with values between 25.3°C (77.5°F) to 36.7°C (98.1°F), though the heavy rainfall of up to 254mm (10") in August and very high humidity levels make this season the wettest period of the year.

Autumn weather in Cacheu

Autumn, falling between September to November in Cacheu, is represented by decreasing levels of rainfall and humidity. Temperatures fluctuate from 24.7°C (76.5°F) to 35.1°C (95.2°F). September still experiences a significant amount of rainfall, but by November, the precipitation drops sharply to only 5mm (0.2").

Winter weather in Cacheu

Winter in Cacheu, from December to February, encounters the driest period of the year with virtually no rainfall. Temperature range decreases slightly and oscillates between 21.2°C (70.2°F) to 35.3°C (95.5°F). Despite being the driest period, the daylight hours and sunshine hours very much resemble the spring season.

Weather in January

As the first month of the year, January presents a pleasant start to the year in Cacheu, Guinea-Bissau. Although quite dry and far from the rainy season, this month still creates a magnificent atmosphere while the daylight lasts for about 11.5 hours. Weather in January »

Weather in February

Moving from January to February, residents in Cacheu observe a gradual shift in the weather conditions. Observing a slight increase in average high and low temperatures, the heat in February is slightly more prominent than in January. Weather in February »

Weather in March

The weather in March presents a balance between dry and wet climate conditions in Cacheu. The notable feature for this month is the jump in rainfall to 11mm (0.43"), signaling the steady transition towards the wet season. However, the temperatures remain relatively steady, only slightly higher than the previous month, and daylight hours maintain their length. Weather in March »

Weather in April

The month of April is a turning point in Cacheu's weather pattern, as the rainy season begins to take root. The city experiences more rainfall than in the previous months, with an average accumulation of 32mm (1.26"). Residents observe a considerable increase in relative humidity, making the city noticeably muggy. Weather in April »

Weather in May

May emerges as the first month to profoundly demonstrate the impact of the rainy season in Cacheu. With a record average rainfall of 199mm (7.83"), the highest for the year, the city witnesses its wettest month. The urban scenery transforms significantly with more clouds accumulating in the sky, and increased rainfall brings about an apparent peak in humidity. Weather in May »

Weather in June

With rainfall taking a slight drop to 133mm (5.24") in June, the torrential downpour observed in May starts to moderate in Cacheu. However, the humidity remains high, keeping the atmosphere muggy throughout the month. Furthermore, the sea temperature starts to rise significantly, providing a warm, inviting sea throughout the day. Weather in June »

Weather in July

July is perhaps one of the most humid months in Cacheu, with high rainfall, relative humidity, and low sunshine hours. A significant drop in average sunshine hours to 6.6 hours indicates a largely cloudy atmosphere as the sea temperature peaks at 28.7°C (83.7°F). Weather in July »

Weather in August

August transitions smoothly from July, mirroring similar weather conditions in Cacheu. The temperatures remain moderately high and steady, with rainfall tapering off to 254mm (10") in August from its July counterpart. The most striking weather pattern this month is the extremely high relative humidity, peaking at 81%, the highest for the year. Weather in August »

Weather in September

Departing from the extremely wet conditions of August, September brings about a particular change in Cacheu. Here, the city sees the end of the peak rainy season, making a progressive shift towards the dry season. With sea temperatures averaging 28.5°C (83.3°F) and the hours of sunshine increasing, the weather begins to regain its dry characteristics. Weather in September »

Weather in October

October makes its mark as an essential transitional month in Cacheu weather dynamics. While rainfall reduces significantly to 41mm (1.61"), the hours of sunshine increase, heralding the onset of the dry season. The sea temperature remains averagely high, offering warm and inviting ocean conditions. Weather in October »

Weather in November

November brings about a signifycant change, moving Cacheu more decisively into its dry season. With only 5mm (0.2") of average rainfall throughout the month, the city shifts dramatically towards drier conditions. Consequently, the temperature and sea temperature remain fairly steady, causing no major discomfort to the residents. Weather in November »

Weather in December

Ending the year on a dry note, December sees no rainfall, making it one of the driest months for Cacheu. Conditions mirror those observed in January, with a similar temperature range, average sea temperature, and humidity level. Weather in December »