Last updated: August 28, 2025
In Cruz Bay, Virgin Islands (U.S.), September offers a warm tropical ambiance with maximum temperatures reaching 29°C (85°F), while the average settles at a comfortable 28°C (82°F). Visitors can expect pleasant evenings with minimum temperatures around 25°C (77°F). However, this month is characterized by a notable rainfall, accumulating to 157 mm (6.2 in) over 18 days, bringing an air of refreshing humidity typically around 80%. While brief showers may punctuate sunny spells, September's warm climate and lush scenery provide a captivating backdrop for exploration and relaxation.
As September rolls into Cruz Bay, the U.S. Virgin Islands embraces a warm and inviting climate that remains consistent with the summer months. With temperatures peaking at a comfortable 29°C (85°F) and settling down to a mild 25°C (77°F) at night, this month showcases an average of 28°C (82°F), making it a delightful haven for beachgoers and outdoor enthusiasts alike. The warmth experienced in September mirrors the trends set in August, where temperatures also hovered around the upper 20s. As the island transitions into autumn, it's clear that the tropical charm of Cruz Bay continues to shine brightly, promising great weather for those seeking sun-soaked adventures and picturesque views.
September in Cruz Bay, Virgin Islands, marks a significant peak in precipitation, with rainfall reaching 157 mm (6.2 in) over approximately 18 days. This sharp increase is indicative of the region's transition into the wetter part of the year, following a gradual rise in rainfall from the previous months. Notably, the precipitation in September is over 40% higher than August's already substantial 113 mm (4.4 in), showcasing the intensifying weather patterns. This surge not only contributes to the lush tropical landscape but also highlights the importance of preparing for potential storms as the hurricane season progresses. As autumn approaches, residents and visitors alike should embrace the abundant rainfall while being mindful of its impact on outdoor activities.
In September, Cruz Bay, Virgin Islands, experiences a humidity level of 80%, reflecting a gradual decline from the peak summer humidity of 82% seen in July and August. This slight decrease indicates a transition towards the drier months ahead, as the humidity begins to taper off towards the fall. Notably, September's humidity is still elevated compared to earlier months in the year, such as March, which recorded 75% humidity. Overall, while September maintains a lingering summer feel, it marks the start of a shift towards more comfortable conditions in the coming months.
In September, the UV Index in Cruz Bay, Virgin Islands, reaches a notable 14, placing it firmly in the extreme exposure category with a quick burn time of just 10 minutes. This trend reflects the consistent intensity of UV radiation throughout the summer months, where the index peaked at 13 from June to August. As summer transitions into fall, sun-seekers should remain vigilant, as the risk for sunburn grows even higher at this time of year. With autumn’s arrival in October, the UV Index slightly decreases to 12, but the need for sun protection remains essential. For the most up-to-date information on UV levels, visit Cruz Bay UV Index.
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As September unfolds in Cruz Bay, Virgin Islands (U.S.), the island basks in an impressive 320 hours of sunshine, offering a delightful transition from the high summer months. This sunshine bounty reflects a seasonal trend characterized by robust daylight during the warmer months, peaking in May with 358 hours before gradually tapering off. While September sees a slight decrease compared to earlier summer months, it still stands strong, showcasing a vibrant blend of tropical warmth and refreshing breezes that make the island irresistible. As the year progresses, the sunshine hours remain generous, particularly leading into the final months, ensuring that visitors can relish the beauty of this paradise, even as October brings a modest dip to 316 hours.
In Cruz Bay, Virgin Islands, September boasts a 58% chance of sunny weather, placing it on the higher end of the spectrum compared to the summer months, where sunshine probabilities dip to the low 50s. As summer transitions into fall, the likelihood of sun increases, reflecting a trend seen through the months—September features more favorable conditions than the preceding July and August. While June shows the lowest probability of sunshine at just 23%, the shift toward autumn brings a subtle lift in brightness, making September a delightful time for visitors seeking sunny skies and vibrant island scenery. As the year progresses, the chances of sunny weather steadily rise again in October and November, reaffirming that late summer and early fall is not just a beautiful period, but also offers a solid chance for sunshine.
As summer transitions to fall, Cruz Bay, Virgin Islands experiences a delightful rhythm in daylight duration. Starting the year with a steady 11 hours of daylight in January and February, the island begins to bask in 12 hours of sunlight from March through August. This sunny peak culminates in June and July, where residents and visitors alike can enjoy 13 hours of daylight, perfectly suited for beach outings and sunset views. However, by September, the days begin to shorten slightly, settling back to 12 hours—a gentle reminder of the approaching autumn. This consistent daylight pattern highlights the Caribbean's relatively stable climate while offering a wonderful blend of long summer days and cozy fall vibes as the year progresses.
In Cruz Bay, Virgin Islands, September marks a notable dip in the prevailing winds, with average speeds dropping to a gentle 5.6 m/s (12 mph). This decrease stands in contrast to the preceding summer months, where the winds hovered around 8.2 m/s to 8.5 m/s (18 to 19 mph). As the humidity begins to rise and the serene waters invite tranquility, September offers a calmer ambiance compared to the breezier months of June and July. This shift towards milder winds continues into October, maintaining the serene vibe of early autumn while setting the stage for the lively gusts that will return later in the year. Overall, the September winds in Cruz Bay provide a soothing retreat, perfect for those seeking relaxation amidst beautiful Caribbean surroundings.
Weather in Cruz Bay varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Cruz Bay, focusing on differences in temperature, rainfall, humidity, and UV levels.
In comparing the weather of September and January, September tends to be warmer and wetter. With average temperatures reaching around 28°C (82°F) and high humidity levels at 80%, it is a lively month with significant rainfall totaling 157 mm (6.2 in) over approximately 18 days. In contrast, January offers a slightly cooler climate, with average temperatures around 25°C (78°F) and lower humidity at 77%. Rainfall is also markedly less, with only 33 mm (1.3 in) spread over 13 days. For those looking for detailed insights on January weather, you can check out Cruz Bay weather in January.
When comparing the weather in September and February, it is evident that September is generally warmer and wetter. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 29°C (85°F), with an average of 28°C (82°F). In contrast, February's temperatures are slightly cooler, with a minimum of 22°C (72°F) and a maximum of 27°C (80°F), averaging 25°C (77°F). Additionally, September experiences significantly more rainfall, with 157 mm (6.2 in) spread over 18 days, while February sees only 32 mm (1.2 in) of precipitation over 12 days. Humidity levels are also similar, with September at 80% and February at 76%, making February slightly less humid. For more detailed weather insights, check out Cruz Bay weather in February.
September and March present notably different weather patterns. In September, temperatures are warmer, with a minimum of 25°C (77°F) and an average of 28°C (82°F), peaking at 29°C (85°F). This month experiences significant rainfall, totaling 157 mm (6.2 in) over approximately 18 days, coupled with high humidity at 80%. In contrast, March features slightly cooler temperatures, with a minimum of 23°C (73°F) and an average of 25°C (77°F), reaching a maximum of 26°C (79°F). The precipitation in March is much lighter at 37 mm (1.5 in) over 12 days, and humidity is lower at 75%. For more detailed information about the weather during March, you can refer to this link: Cruz Bay weather in March.
September and April exhibit distinct weather patterns, with September typically warmer and much wetter than April. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 29°C (85°F), accompanied by high humidity levels of 80% and significant rainfall of 157 mm (6.2 in) over 18 days. In contrast, April experiences milder temperatures, with a minimum of 23°C (74°F) and a maximum of 27°C (81°F), along with much less precipitation at 39 mm (1.5 in) spread over just 8 days and slightly lower humidity at 77%. For a more detailed look at the weather specifics, you can check out Cruz Bay weather in April.
September and May exhibit relatively similar temperatures, with September slightly warmer, showcasing a minimum of 25°C (77°F) and an average of 28°C (82°F), compared to May’s minimum of 24°C (75°F) and average of 26°C (79°F). However, September is notably wetter, receiving 157 mm (6.2 in) of precipitation over 18 days, whereas May has only 60 mm (2.4 in) across 14 days. The humidity levels are comparable, with September at 80% and May at 78%, contributing to the tropical feel in both months. For more detailed information on May weather, you can visit Cruz Bay weather in May.
In comparing the weather of September and June, both months exhibit similar temperatures, with minimums around 25°C (77°F) and maximums peaking at 29°C (85°F). However, September tends to be slightly warmer on average with temperatures reaching 28°C (82°F), compared to June's average of 27°C (81°F). Notably, September experiences significantly higher precipitation, averaging 157 mm (6.2 in) over 18 days, in contrast to June's 61 mm (2.4 in) over 16 days. Humidity levels are also comparable, with September at 80% and June slightly lower at 79%. For a detailed look at June weather, you can visit Cruz Bay weather in June.
In comparing the weather between September and July, both months experience similar warm temperatures, with September slightly edging out with an average of 28°C (82°F) compared to July's average of 27°C (81°F). Notably, September sees higher precipitation levels, totaling 157 mm (6.2 in) over 18 days, while July has 93 mm (3.7 in) spread across 19 days. Additionally, humidity remains relatively high in both months, with September at 80% and July at 82%. For a more detailed look at the July weather, you can check Cruz Bay weather in July.
September and August share similar temperature ranges, with minimums around 25°C (77°F), averages of 28°C (82°F), and maximums reaching 29°C (85°F). However, September sees a notable increase in precipitation, totaling 157 mm (6.2 in) over 18 days, compared to August's 113 mm (4.4 in) across 17 days. Additionally, while humidity levels remain high in both months, September has a slightly lower average at 80% compared to August's 82%. For more details on August's weather, you can check Cruz Bay weather in August.
In September, the weather remains warm with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 29°C (85°F) and an average of 28°C (82°F). It experiences higher precipitation, totaling 157 mm (6.2 in) over 18 days, and a humidity level around 80%. In contrast, October shows a slight decrease in average temperature to 27°C (82°F), while maintaining a similar range, with the same minimum and maximum temperatures as September. Precipitation also decreases to 133 mm (5.2 in), still spread over 18 days, and humidity dips slightly to 79%. For more detailed weather information, you can check Cruz Bay weather in October.
In comparing the weather between September and November, it is notable that both months experience warm temperatures, with September showing a slightly higher average temperature of 28°C (82°F) compared to November's 27°C (80°F). The maximum temperatures are also marginally higher in September at 29°C (85°F) versus November's 28°C (83°F). September tends to be more humid, with humidity levels around 80%, while November sees a slight decrease to 79%. Additionally, September receives more rainfall, totaling 157 mm (6.2 in) over 18 days, whereas November has less precipitation at 106 mm (4.2 in) across 16 days. For more details on the weather during November, you can check Cruz Bay weather in November.
September and December weather shows noticeable differences in both temperature and precipitation. In September, the average temperature is slightly warmer, ranging from a minimum of 25°C (77°F) to a maximum of 29°C (85°F), accompanied by significant rainfall totaling 157 mm (6.2 in) over 18 days, with a high humidity level of 80%. In contrast, December offers cooler temperatures, with averages between 24°C (75°F) and 28°C (83°F), and considerably less precipitation, totaling only 51 mm (2.0 in) across 16 days, alongside a slightly lower humidity of 77%. For a more detailed overview of December weather in this region, you can check Cruz Bay weather in December.
As September rolls in, Cruz Bay experiences a blend of warmth and humidity that sets it apart from other months. With temperatures typically hovering around a comfortable 28°C (82°F), this month leans towards a distinctively wetter pattern, recording significant rainfall over numerous days. The high humidity level, nearing 80%, adds a tropical feel, making the atmosphere lush and vibrant. This combination can lead to brief, yet refreshing, downpours that rejuvenate the landscape. For a deeper understanding of how September weather compares to other months, you can explore more at Cruz Bay Climate.