Last updated: January 18, 2025
Swains Island, part of American Samoa, exhibits a tropical rainforest climate classified as Af according to the Köppen-Geiger system. Characterized by warm temperatures year-round, the island experiences a minimum of 24°C (75°F) in February, an average of 27°C (81°F), and peaks at a maximum of 30°C (86°F) in May. This stable climatic condition supports a rich biodiversity, making Swains Island a unique ecological haven in the Pacific.
Swains Island, American Samoa, experiences consistently warm temperatures year-round, with only slight seasonal variations. The minimum temperatures range from 24°C (75°F) to 25°C (78°F), typically peaking in the summer months of February and May. The average temperatures fluctuate slightly around 27°C (81°F), with a modest uptick to 28°C (82°F) in April and May. Notably, maximum temperatures remain relatively stable, hovering around 29°C (84°F) to 30°C (86°F), with the highest recorded in May. This stability in temperature reflects the island's tropical environment, creating a humid and inviting atmosphere throughout the year.
In Taulaga, temperatures range from a minimum of 24°C (75°F) in February to a maximum of 30°C (86°F) in May, showcasing a warm tropical climate throughout these months. For more detailed information on monthly temperatures in Taulaga, visit monthly temperatures in Taulaga.
Swains Island, American Samoa, experiences a marked variation in precipitation throughout the year, with a notable concentration during the peak wet season. February witnesses the highest rainfall, recording 446 mm (17.6 inches) across 25 days, making it the wettest month. Following closely are January and December, with 257 mm (10.1 inches) and 322 mm (12.7 inches), respectively. This consistent rainfall contributes to the lush tropical rainforest environment of the island, where precipitation patterns are integral to the local ecosystem's vitality.
As the year progresses into the drier months, precipitation levels decrease significantly. Notably, August and September are the driest months, with only 151 mm (5.9 inches) and 145 mm (5.7 inches) of rain, respectively, while maintaining relatively similar rainfall days, around 22 to 25 days. Despite these lower totals, rainfall is spread throughout the year, ensuring that the island's flora and fauna remain thriving. Overall, Swains Island’s climate reflects a unique balance, where both wet and dry periods are essential for sustaining its rich biodiversity.
Swains Island, American Samoa, showcases a distinct pattern in sunshine duration throughout the year, characterized by peak sunlight in the transitional months of spring and autumn. January begins the year with 236 hours of sunshine, gradually increasing into the spring. March stands out with an impressive 305 hours of bright sunshine, marking it as one of the sunniest months. This sunny trend continues into April and May, where 275 hours and 291 hours are recorded, respectively, indicating that the early months of the year offer an ample opportunity for outdoor activities and agricultural growth.
As the year progresses into summer, sunshine hours remain relatively stable but show slight fluctuations. Notably, August and September both achieve 299 hours, sustaining the bright conditions from the spring. However, a gradual decline begins in the latter part of the year, with December recording 275 hours. Such variations in sunshine duration highlight the island's dynamic seasonal changes, with ample sunlight making the dry season particularly advantageous for tourism and recreation while maintaining favorable conditions for local ecosystems throughout the year. Overall, the sunshine patterns in Swains Island reflect a tropical climate that balances periods of abundance with seasonal transitions.
The UV Index in Swains Island, American Samoa, reveals consistently high levels of ultraviolet radiation throughout the year, underscoring the need for sun protection. From January to March, the UV Index peaks at an extreme 16, indicating that just 10 minutes of unprotected sun exposure can lead to skin damage. This extreme classification persists into April, albeit with a slight decrease to 14. As the seasons transition from summer to late spring, residents and visitors must remain vigilant in employing protective measures, especially during these peak months of solar intensity.
As the year progresses into late spring and summer, while still maintaining high UV levels, a gradual decline occurs. By June and July, the UV Index lowers to 10, classified as very high, allowing for a slightly longer 15-minute burn time. However, it remains essential to exercise caution. The UV Index experiences another rise in August and continues to fluctuate throughout the fall, with values between 13 and 15, reaffirming the extreme conditions. This seasonal data serves as a vital reminder for everyone on the island to adopt protective strategies against UV exposure year-round.
UV Risk Categories
Daylight duration in Swains Island, American Samoa, is characterized by a noteworthy consistency throughout the year, with little variation in hours of sunlight. From January to March, the island enjoys a steady 12 hours of daylight per day. This equality of day and night fosters a conducive environment for both local activities and natural ecosystems, highlighting the tropical paradise that Swains Island represents.
As the year progresses into the late spring and summer months of April through August, daylight decreases slightly to 11 hours daily. This reduction is indicative of the subtle shifts in the island's seasonal patterns, yet sunlight remains ample for outdoor pursuits and community life. Interestingly, as September approaches, daylight duration returns to 12 hours, maintaining a harmonious balance through the fall and winter months. Such stable daylight conditions contribute significantly to the island's lush landscape and vibrant culture, allowing residents and visitors to enjoy outdoor experiences year-round.
Taulaga, American Samoa experiences a tropical climate characterized by warm temperatures and substantial rainfall throughout the year. Average temperatures range from 27°C (81°F) to 28°C (82°F), with highs peaking in the warmer months between February and May. Precipitation is highest in February, reaching 446 mm (17.6 in), while the drier months occur from August to October. Despite the rainfall, Taulaga enjoys considerable sunshine, with March and November averaging around 305 and 303 hours, respectively. For more detailed information, visit Taulaga climate.
In conclusion, Swains Island, American Samoa, presents a captivating climate characterized by consistently warm temperatures, ample rainfall, and substantial sunshine. The island's unique weather patterns contribute to its rich biodiversity and vibrant ecosystems, making it a haven for both residents and visitors. Additionally, the stable daylight duration allows for year-round outdoor activities, while the high UV Index serves as a reminder of the sun's intensity in tropical regions. Together, these climatic elements underscore the importance of understanding and adapting to the island's environmental conditions, fostering a deep appreciation for its natural beauty and the need for sustainable practices to preserve this paradise for future generations.