Last updated: January 18, 2025
The climate of Oio, Guinea-Bissau, is characterized by a tropical savanna climate (Koppen-Geiger classification: Aw), which features distinct dry and wet seasons. With an average annual temperature of 28°C (83°F), the region experiences notable temperature variability, ranging from a minimum of 14°C (57°F) in January to a sweltering maximum of 44°C (111°F) in April. This climatic framework not only influences local ecosystems but also significantly impacts agricultural practices and water resource management in the area.
Oio, Guinea-Bissau experiences significant seasonal temperature variations throughout the year, reflecting a typical tropical climate. In the cooler months of January to March, temperatures begin relatively low, with January registering a minimum of 14°C (57°F) and an average of 26°C (79°F). As the season progresses towards April, temperatures peak, reaching a scorching maximum of 44°C (111°F). The transition into the wet season from May to August sees temperatures stabilize, remaining consistently around 30°C (86°F) during the day, while nighttime lows hover above 20°C (68°F). In contrast, the cooler months return in November and December, where the temperature begins to drop again, cycling back to 15°C (59°F) minimums and 37°C (100°F) maximums. This annual thermal rhythm underscores the influence of both seasonal shifts and geographical factors on Oio's climate.
In Mansoa, temperatures range from a minimum of 17°C (62°F) in January to a maximum of 43°C (110°F) in April, while Farim experiences slightly cooler conditions with temperatures ranging from 14°C (57°F) in January to a peak of 44°C (111°F) in April. Bissora shows a similar pattern, with January temperatures starting at 15°C (59°F) and reaching up to 43°C (110°F) in April. For more detailed information, visit monthly temperatures in Mansoa, monthly temperatures in Farim, and monthly temperatures in Bissora.
Oio, Guinea-Bissau witnesses a pronounced seasonal pattern in precipitation, dominated by a stark dry season followed by a heavy wet season. From January through April, cumulative rainfall remains absent, with 0 mm recorded during these months. The onset of the rainy season begins in May, with a modest 3 mm of precipitation, which rapidly escalates in June with 52 mm. The peak rainfall occurs during the heart of the wet season in July and August, where Oio receives substantial amounts of 364 mm and 463 mm, respectively, with rainfall occurring on most days.
As the season progresses into September, precipitation remains significant at 346 mm, marking the end of the heaviest rains before gradually tapering off. By October, rainfall decreases to 105 mm, and November sees a further reduction to 15 mm. The annual rainfall cycle concludes with a return to dry conditions in December, leaving residents with a pattern that starkly contrasts between the arid dry months and the intense downpours of the wet season. This rainfall distribution plays a critical role in shaping the region's flora, agriculture, and water resource management.
In Oio, Guinea-Bissau, the sunshine duration showcases a compelling seasonal trend, with a clear increase in hours of sunlight from the beginning of the year culminating in the late spring. Starting from 258 hours in January, the amount of sunlight begins rising steadily, reaching a peak of 344 hours in May. This gradual climb through the dry season emphasizes the abundance of clear skies and longer days, encouraging outdoor activities and agricultural endeavors. Notable is the consistency throughout the spring months, with March and April also boasting impressive sunshine totals of 335 hours and 332 hours, respectively.
As summer approaches, however, a shift occurs, characterized by a gradual decline in sunshine hours despite the continued presence of warm weather. The months of June through August see a decrease, starting from 309 hours in June to just 250 hours in August, likely influenced by the advent of the rainy season and increased cloud cover. Interestingly, autumn brings a rebound in sunlight, with October and November averaging 299 hours and 304 hours, respectively, and December concluding the year with an average of 319 hours. This cyclical pattern underscores Oio’s unique interplay between seasonal changes and sunshine, profoundly impacting local weather, agriculture, and daily life.
The UV Index in Oio, Guinea-Bissau reflects a consistent pattern of high to extreme ultraviolet radiation throughout the year, prompting essential considerations for sun safety. Beginning in January and February, the UV Index stands at 10, classified as very high, necessitating precautions since the burn time for unprotected skin is merely 15 minutes. As the year progresses into the spring months of March and April, the index escalates to 12, indicating extreme levels of UV radiation that reduce safe exposure time to just 10 minutes. May continues this trend, maintaining an extreme contact level with a UV Index of 13 as the intensity of sunlight peaks ahead of the rainy season.
During the summer months of June, July, and August, the UV Index remains elevated at 13 and reaches its maximum of 14 in August and September, emphasizing the need for stringent sun protection measures, including sunscreen application and protective clothing. Notably, even as autumn arrives, the index begins to decrease, landing at 12 in October, but still maintains extreme conditions. By November and December, the UV Index drops to 9, classified as very high, allowing for a slightly longer burn time of 15 minutes. This persistent high UV exposure throughout much of the year underlines the importance of sun safety practices for residents and visitors in Oio.
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In Oio, Guinea-Bissau, daylight duration exhibits a stable pattern throughout the year, with minor fluctuations between the dry and wet seasons. The year commences with 11 hours of daylight in both January and February, setting a foundation of consistent light exposure during the cooler months. As the region transitions into March, daylight increases to 12 hours, a trend that continues through the following months of April, May, June, July, and August. This 12-hour duration aligns with the height of the dry season, maximizing opportunities for agricultural activities and outdoor endeavors.
As the year progresses into September, daylight remains steady at 12 hours, reflecting the ongoing sunny conditions typical of Oio's tropical climate. However, in October, a slight decrease occurs as daylight returns to 11 hours, a pattern that continues through November and December. Overall, the relatively even distribution of daylight hours throughout the year emphasizes the region’s unique climatological characteristics, promoting a consistent rhythm in daily life, seasonal activities, and local ecosystems.
Bissora, Guinea-Bissau experiences a tropical climate characterized by high temperatures and distinct wet and dry seasons. January to April sees maximum temperatures reaching up to 43°C (109°F) with no precipitation, while the rainy season from June to September brings substantial rainfall, peaking in August with 463 mm (18.2 in). Average temperatures during the rainy months remain warm, around 27°C (81°F). Sunshine hours are abundant, especially in the dry season, with May providing the highest at 345 hours. For more detailed information, visit Bissora climate.
The climate in Farim, Guinea-Bissau is characterized by hot temperatures and a distinct rainy season. From January to April, temperatures soar, reaching highs of up to 44°C (111°F) in April, with minimal rainfall. The region experiences substantial precipitation from May to September, with July and August recording over 400 mm (16 inches) of rain. The sun shines brightly for more than 300 hours per month from January to May, decreasing in the later months. For more detailed information, visit Farim climate.
Mansoa, Guinea-Bissau experiences a tropical climate characterized by high temperatures and distinct wet and dry seasons. From January to April, the temperatures range from a minimum of 17°C (62°F) to a maximum of 43°C (109°F), with little to no rainfall. The rainy season begins in May, peaking in July and August with significant precipitation, reaching up to 510 mm (20.1 in) in August. Despite the rainfall, sunshine hours remain relatively high, with the region receiving over 300 hours in most months. For more details, visit Mansoa climate.
In conclusion, Oio, Guinea-Bissau presents a unique climatic profile characterized by its tropical savanna climate with predictable seasonal patterns in temperature, precipitation, sunshine duration, UV Index, and daylight hours. The region experiences significant temperature fluctuations, with extremely high averages peaking during the dry season, while rainfall displays a stark contrast between dry months and the intense wet season. Coupled with abundant sunshine and a moderately steady daylight duration, the high UV Index underscores the need for effective sun protection. Understanding these climatic elements is essential for residents and visitors alike, as they directly influence agricultural practices, health considerations, and outdoor activities, ultimately shaping the lifestyle in this vibrant West African locale.