Last updated: January 18, 2025
Saint Croix Island, part of the U.S. Virgin Islands, exhibits a tropical savanna climate, classified as Aw under the Köppen-Geiger system. The island enjoys a warm climate year-round, with average temperatures hovering around 26°C (80°F). Seasonal variations are evident, with minimum temperatures dipping to 22°C (72°F) in February, while peak temperatures reach 29°C (85°F) in September, showcasing the region's characteristic warmth and vibrant ecosystem.
Temperature patterns on Saint Croix Island reflect a consistent tropical climate characterized by warm conditions throughout the year. During the early months, from January to March, temperatures range from a minimum of 22°C (72°F) in February to a maximum of 27°C (81°F), maintaining an average of about 25°C (77°F). As spring transitions to summer in April and May, a slight increase is noted, with averages rising to 26°C (78°F) and 26°C (80°F) respectively, and maximums reaching 28°C (83°F). The summer months of June through September showcase peak temperatures, consistently hovering around 29°C (84°F to 85°F), while minimum temperatures remain stable at 25°C (77°F to 78°F). In October and November, a gradual cooling occurs, with averages dropping back to 27°C (81°F), while December brings a similar climate with continued warmth, demonstrating the island's overall tropical charm and minimal seasonal fluctuation.
Saint Croix experiences a mild climate with February temperatures ranging from a minimum of 22°C (72°F) to a maximum of 29°C (85°F) in September. This comfortable temperature range makes it an appealing destination year-round. For more details on the monthly temperatures in Saint Croix, visit monthly temperatures in Saint Croix.
Saint Croix Island experiences a varied precipitation pattern throughout the year, characterized by both dry and wet seasons. The early months of January to March see relatively low rainfall, with amounts ranging from 31 mm (1.2 in) to 34 mm (1.3 in), and an average of 11 to 13 rainy days each month. As the island transitions into spring and summer, precipitation begins to increase, reaching 41 mm (1.6 in) in April and climbing further to 57 mm (2.2 in) in May. The onset of summer, particularly from June to August, marks a significant rise in rainfall, with July and August experiencing substantial totals of 92 mm (3.6 in) and 123 mm (4.8 in) respectively.
The peak of the rainy season occurs in September, when the island receives its highest average monthly precipitation of 156 mm (6.2 in), accompanied by 20 rainy days. Following September, rainfall diminishes gradually in October and November, with averages of 130 mm (5.1 in) and 98 mm (3.9 in) respectively. December sees a notable drop to 50 mm (2.0 in) of rain over 16 days, signaling the conclusion of the rainy season. Overall, Saint Croix's precipitation patterns highlight the influence of tropical climate dynamics, balancing periods of intense rainfall with drier months throughout the year.
Saint Croix Island enjoys a generous amount of sunshine throughout the year, showcasing a seasonal trend marked by an increase in sunshine hours as winter transitions into spring and summer. In the early months, January offers 260 hours of sunshine, gradually increasing to 303 hours in February and reaching 349 hours in March. This upward trajectory continues into April and May, with sunshine hours peaking at 361 hours in May, which is often considered one of the island’s sunniest months. The consistent accumulation of sunlight during these months allows for vibrant tropical vegetation and is an inviting time for visitors seeking warm and sunny vacations.
As summer unfolds, the sunshine duration remains robust, averaging around 344 to 356 hours from June to July before slightly tapering off in August and September. Although these months still provide ample sunlight, the hours decrease to 349 hours and 319 hours, respectively. Interestingly, the fall months of October and November experience a slight dip, with 318 hours and 307 hours of sunshine, yet they still offer significant daylight for outdoor activities. Overall, despite minor fluctuations, Saint Croix consistently basks in sunshine, making the island a delightful destination year-round for those seeking sun-drenched relaxation.
Saint Croix Island experiences a notably high UV Index throughout the year, reflecting the intense tropical sun that bathes the region. In January, the UV Index begins at 9, categorized as very high, indicating a burn time of just 15 minutes without protection. As the year unfolds, February sees a sharp rise to 11, transitioning to an extreme classification, and the burn time drops to a mere 10 minutes. This trend continues into the spring months, where March through May maintain a consistently high UV Index of 13, requiring diligent sun protection in the brutally intense sunshine.
The peak UV Index occurs in September, reaching 14, while the summer months of June through August stabilize around 13, all within the extreme category with an equally minimal burn time of 10 minutes. As the year progresses into the fall, the index decreases slightly, registering 12 in October and tapering back to 10 in November, before returning to 9 in December. Despite these seasonal fluctuations, the overall UV resilience on Saint Croix underscores the necessity for proactive sun safety measures to protect against skin damage, especially during the peak months.
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Saint Croix Island showcases a relatively stable pattern of daylight duration throughout the year, reflecting its tropical location near the equator. In the winter months of January and February, residents and visitors alike can expect approximately 11 hours of daylight. As spring approaches in March, daylight increases to 12 hours, which continues through April and May, providing more opportunities for outdoor activities and exploration. The consistent amount of daylight during this period creates a vibrant atmosphere, perfect for experiencing the lush landscapes and cultural richness of the island.
With the arrival of summer in June and July, daylight reaches a peak of 13 hours, offering the longest days of the year, ideal for beach outings and water sports. As summer transitions into late summer and early fall, the daylight gradually decreases back to 12 hours from August through September. Moving into the fall and winter months, daylight returns to 11 hours in October, November, and December, completing the cycle. Overall, this stable daylight pattern contributes to Saint Croix's appeal as a year-round destination, providing ample sunlight for diverse activities, relaxation, and enjoyment.
Saint Croix, U.S. Virgin Islands, enjoys a tropical climate characterized by warm temperatures and varying rainfall throughout the year. Average daily temperatures range from 25°C (77°F) in cooler months like January and February to 28°C (82°F) in the summer. Precipitation peaks in September with 156 mm (6.2 in), while the island basks in ample sunshine, particularly in May with 361 hours. For more detailed climate information, visit Saint Croix climate.
In conclusion, Saint Croix Island, with its exceptional climate, abundant sunshine, and consistent daylight duration, stands out as an attractive destination for travelers and nature enthusiasts alike. The island’s warm temperatures, high UV Index, and distinct precipitation patterns create an inviting environment for outdoor activities throughout the year. Whether it's basking in the sun during the extended summer days or enjoying the slightly cooler and drier months, visitors are afforded a unique opportunity to experience the rich natural beauty and cultural vibrancy of this Caribbean paradise. As such, prudent sun safety measures and an appreciation for the island's climate dynamics are essential for maximizing enjoyment while exploring all that Saint Croix has to offer.