Last updated: April 14, 2025
The climate of São Tomé and Príncipe is characterized by warm temperatures and substantial humidity, influenced by the islands' tropical maritime setting. Average temperatures range from a minimum of 22°C (73°F) in July on São Tomé Island to a maximum of 30°C (86°F) in March on Príncipe. Precipitation levels vary significantly, with a low of 19 mm (0.7 in) in July on São Tomé Island escalating to 286 mm (11.2 in) in October on Príncipe. Humidity is also notable, with averages reaching 73% in March and peaking at 86% in September on Príncipe, creating a lush environment that supports the rich biodiversity of these islands.
Sao Tome and Principe boasts diverse climate zones that significantly influence its lush landscapes and biodiversity. Príncipe is classified under the Af (tropical rainforest) climate, characterized by high temperatures and abundant rainfall throughout the year, fostering a rich array of flora and fauna. In contrast, São Tomé Island features an As (tropical savanna) climate, experiencing a distinct dry season that contributes to its unique ecosystems. Together, these climate zones create a vibrant tapestry of environments, supporting both the islands' natural beauty and their cultural heritage.
| Climate Zone | Description |
|---|---|
| Af | Tropical rainforest climate with no dry season and high temperatures year-round. |
| As | Tropical savanna climate with a dry season occurring in summer. |
The temperature in São Tomé and Príncipe exhibits a warm, tropical pattern throughout the year, with averages consistently hovering between 24°C (76°F) and 30°C (86°F). In January, temperatures start at a minimum of 24°C (76°F) in São Tomé Island and reach up to 29°C (84°F) in Príncipe. As the months progress, February and March see slight increases, with maximum temperatures peaking at 30°C (86°F) in March. The warmth remains stable into April and May, where temperatures rest around 29°C (85°F). A gradual cooling trend is evident from June to August, where July experiences its lowest averages of 22°C (73°F) to 27°C (81°F). This pattern holds through September and October, with minimal fluctuation, before closing the year in December with temperatures once again reaching 25°C (76°F) in São Tomé Island and 29°C (84°F) in Príncipe. Overall, the climate is consistently warm, making it an inviting destination year-round.
Precipitation patterns in São Tomé and Príncipe reveal a striking contrast throughout the year, with significant variations between the islands and the seasons. In July, São Tomé Island experiences its driest spell, recording a minimum of just 19 mm (0.7 in) of rain over as few as 3 days. Conversely, the month of October brings a transformation, particularly on Príncipe, where precipitation peaks at 286 mm (11.2 in), with rainfall occurring on up to 28 days. This trend underscores the islands' tropical climate, characterized by a marked wet season that influences not only the landscape but also the local lifestyle and ecosystem, showcasing the dynamic interplay between moisture and arboreal beauty in these lush archipelagos.
The humidity levels in Sao Tome and Principe exhibit a notable range throughout the year, particularly on the island of Príncipe. In March, the humidity dips to a comfortable 73%, providing a relatively pleasant atmosphere. However, as the year progresses into September, humidity peaks at a high 86%, contributing to a muggy climate that characterizes the onset of the rainy season. This trend reflects the islands' tropical climate, where rising humidity correlates with increased precipitation, impacting both the natural landscape and the overall visitor experience.
The UV Index in São Tomé and Príncipe shows a consistent pattern, particularly in April, where both São Tomé Island and Príncipe experience an average daily maximum UV Index of 14. This remarkable level indicates a significant intensity of ultraviolet radiation, prompting the need for enhanced sun protection during this month. As such, residents and visitors alike should remain vigilant, ensuring that they take appropriate measures to shield themselves from potential sun-related health risks. Understanding these trends is essential for planning outdoor activities in this tropical paradise.
UV Risk Categories
In São Tomé and Príncipe, sunshine duration reveals intriguing patterns throughout the year. Notably, Príncipe enjoys a robust 290 hours of sunshine in December, marking a peak that lends itself to vibrant tropical experiences. Meanwhile, São Tomé Island also shines brightly in January with 250 hours of sunlight, a promising start to the year. Interestingly, June on Príncipe shares this same total of 250 hours, suggesting a consistent sun-filled mid-year. The warm month of September brings São Tomé Island to the forefront with an impressive 295 hours of sunshine, making it a prime time for outdoor activities and exploration. Overall, both islands exhibit a delightful interplay of sun-kissed days, creating idyllic atmospheres for visitors year-round.
When considering the likelihood of sunny weather in São Tomé and Príncipe, distinct patterns emerge across the months. In September, the chance of sunshine drops to a modest 14% in Príncipe, suggesting a shift towards cloudier conditions as the wet season approaches. In contrast, July offers a brighter perspective, with a much higher 33% likelihood of sunny skies on São Tomé Island. This trend indicates that visitors can expect more favorable weather conditions during mid-year, perfect for exploring the islands’ lush landscapes and vibrant culture, while the later months lean towards increased rainfall and overcast days.
In São Tomé and Príncipe, daylight hours remain remarkably consistent throughout the year, with approximately 12 hours of sunlight in both January and June. This uniformity not only highlights the equatorial nature of the islands but also contributes to their lush, vibrant ecosystems, allowing for year-round exploration and enjoyment of the breathtaking landscapes. Whether you're soaking up the sun on Príncipe's pristine beaches in mid-winter or indulging in outdoor adventures during the summer months, you can always count on a generous dose of daylight to enhance your experience in this tropical paradise.
Nestled in the lush heart of the Atlantic, Príncipe boasts a tropical climate characterized by consistently warm temperatures year-round. From average highs of 29°C (84°F) in January to cooler months around 25°C (78°F) in July and August, the weather remains inviting. However, be prepared for significant rainfall, especially from April to October, when monthly totals often exceed 250 mm (10 in). The island experiences high humidity, peaking in September at 86%, which enhances its lush, vibrant ecosystems. For detailed insights into this stunning island's weather patterns, delve into the Príncipe climate.
São Tomé Island boasts a tropical climate characterized by warm temperatures year-round. With January and February averaging a pleasant 27°C (81°F), it warms slightly in the following months, maintaining highs of around 29°C (84°F). However, the rainy season from April to November brings significant precipitation, peaking in November with 233 mm (9.2 in) of rain, while the humidity often hovers around a steamy 76-86%. Visitors can expect a mix of sun and showers, creating a lush, green paradise that is captivating throughout the year. For a deeper dive into the nuances of the weather patterns, check out São Tomé Island climate.
The climate of São Tomé and Príncipe showcases a delightful tropical rhythm, characterized by warm temperatures and varying precipitation through the months. July marks a comfortable period with temperatures cooling to a minimum of 22°C (73°F) on São Tomé Island, while March brings warmer highs of 30°C (86°F) in Príncipe. Rainfall, however, tells a different story: while July sees a relatively dry spell with just 19 mm (0.7 in) on São Tomé Island, October is drenched with an impressive 286 mm (11.2 in) in Príncipe. Humidity levels oscillate throughout the year, peaking at 86% in September in Príncipe and dropping to 73% in March, revealing how the islands' lush landscapes thrive amidst this climatic dance. Overall, the climatic conditions create a vibrant environment that supports the unique biodiversity and rich cultural fabric of these islands, making them a fascinating destination for both nature enthusiasts and cultural explorers.