Last updated: August 28, 2025
August in Saint Croix, Virgin Islands (U.S.) offers a tropical experience marked by warm temperatures and high humidity. During this month, the maximum temperature reaches a pleasant 29°C (85°F), while the average hovers around 28°C (82°F) and the minimum dips to 25°C (77°F). However, travelers should be prepared for a moist atmosphere, as the island receives 123 mm (4.8 in) of precipitation over 17 days. With an average humidity level of 82%, August in Saint Croix combines warmth and occasional rain, creating a lush and vibrant environment ideal for both relaxation and exploration.
In August, Saint Croix, Virgin Islands, enjoys warm and inviting temperatures, with minimums around 25°C (77°F) and maximums reaching up to 29°C (85°F). The month features an average temperature of 28°C (82°F), mirroring the high summer warmth that July brings. This marks a slight rise compared to previous months, signaling the peak of the season where both locals and visitors revel in the tropical sun. As summer transitions toward autumn, the consistent heat makes August an ideal time for beach activities and outdoor adventures, with conditions remaining comfortably warm even as the sun sets.
August in Saint Croix, U.S. Virgin Islands, marks a notable peak in precipitation, with 123 mm (4.8 in) of rain falling across 17 days. This is distinctly higher than the preceding months, contributing to the overall wet season's intensity. Following July's significant rainfall of 92 mm (3.6 in), August escalates moisture levels, paving the way for an even wetter September, which averages 156 mm (6.2 in) over 20 days. This trend showcases a marked increase in both precipitation amounts and rainy days as summer transitions to fall, emphasizing the region's tropical climate and the onset of its most humid months. Such downpours not only refresh the lush landscapes but also highlight the rhythmic cycle of wet weather that characterizes life in this beautiful Caribbean paradise.
In August, humidity in Saint Croix, Virgin Islands, remains elevated at 82%, a slight dip from the 83% peak experienced in July. This month continues a trend of increasing humidity that starts in the earlier summer months, where levels have steadily risen from 77% in January to the 81% mark in June. As the summer progresses, the warm tropical air keeps the island’s atmosphere thick and sultry, though humidity starts to slightly wane in September, dropping to 80%. The overall pattern indicates a warm and humid climate typical of the region, inviting visitors to bask in the lush scenery while staying prepared for the tropical conditions.
August in Saint Croix, Virgin Islands, sees a consistent UV Index of 13, categorized as extreme, with a burn time of just 10 minutes. This level of exposure underscores the region's ongoing trend of high UV intensity during the summer months, aligning with the highs experienced from March through July. As summer transitions into fall, the UV Index slightly increases to 14 in September, yet the extreme caution remains essential in August. Travelers and locals alike should prioritize sun protection to safely enjoy the beautiful Caribbean sun. For more detailed information, check out Saint Croix UV Index.
UV Risk Categories
August in Saint Croix, Virgin Islands, basks in 349 hours of glorious sunshine, making it a perfect time for beachgoers and outdoor enthusiasts to soak up the vibrant tropical atmosphere. As summer reaches its peak, sunshine hours remain strong, closely mirroring the warmth of July's 356 hours. This slight dip subtly hints at the transition towards fall, yet the abundance of sun invites visitors to partake in the island's myriad activities. The sunny trend throughout the summer months showcases Saint Croix's allure, where each day beckons with opportunities for adventure and relaxation under a radiant sky.
In August, Saint Croix, Virgin Islands, experiences a 46% chance of sunny weather, showing a slight dip from the preceding months of June and July. This summer period reflects a larger trend where the likelihood of sunshine begins to decline post-June, peaking in the earlier months of the year, like February and March, which boast chances as high as 72% and 71% respectively. As the year progresses, especially towards the fall, the chances start to rebound; September sees an increase back to 61%. Thus, while August may not be the sunniest month, it still holds promise for beachgoers and sun-seekers, especially as sunny days soon become more frequent again in the following months.
In Saint Croix, U.S. Virgin Islands, August marks a transition point in daylight duration, with the sun gracing the island with 12 hours of light each day. This period follows the peak of summer in July, when daylight reaches its maximum at 13 hours. As the months progress from January's steady 11 hours of daylight, we see a gradual climb to June's brightest days, before experiencing a gentle decline as autumn approaches. Interestingly, both August and September maintain this 12-hour rhythm, providing a perfect balance of sunlight for outdoor activities and Caribbean relaxation. This consistency highlights the tropical charm of Saint Croix, where daylight remains abundant throughout the year.
In August, the winds in Saint Croix, Virgin Islands, tend to be gentle yet refreshing, with an average speed of 7.4 m/s (17 mph). This represents a slight decline compared to the slightly breezier months of June and July, which enjoy average speeds of 8.1 m/s (18 mph) and 8.5 m/s (19 mph) respectively. As the summer progresses, the winds soften, transitioning into the quieter conditions of September, which sees a notable drop to 5.5 m/s (12 mph). Nonetheless, August's breezes still provide a pleasant atmosphere ideal for both relaxing on the beach and engaging in water sports, making it a delightful month amid the ever-changing winds of the island.
Weather in Saint Croix varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Saint Croix, focusing on differences in temperature, rainfall, humidity, and UV levels.
In August, the weather is typically warmer with average temperatures reaching 28°C (82°F) and high humidity levels at 82%. Rain is more frequent during this month, with 123 mm (4.8 in) of precipitation over approximately 17 days. In contrast, January offers slightly cooler temperatures, with averages around 25°C (78°F) and reduced humidity at 77%. Precipitation is also significantly lower in January, with only 34 mm (1.3 in) falling over 13 days. For more detailed information on January weather, you can check Saint Croix weather in January.
When comparing the weather in August and February, August tends to be warmer and more humid. With average temperatures around 28°C (82°F) and high humidity at 82%, August experiences frequent rain, totaling about 123 mm (4.8 inches) over 17 days. In contrast, February comes with milder temperatures, averaging 25°C (77°F), lower humidity at 77%, and significantly less rainfall, with only 31 mm (1.2 inches) over 11 days. For more detailed information on February weather, you can check Saint Croix weather in February.
In comparing the weather of August and March, August generally presents warmer temperatures, with an average of 28°C (82°F) and a maximum reaching 29°C (85°F). In contrast, March offers milder conditions, averaging 25°C (77°F) with a peak temperature of 26°C (80°F). Additionally, August sees significantly higher precipitation levels at 123 mm (4.8 in) over 17 days, compared to March's 34 mm (1.3 in) across 11 days. Humidity is also higher in August at 82%, while March features a relatively lower humidity of 77%. For a more detailed look at the weather specifics in March, you can visit Saint Croix weather in March.
In August, the weather is typically warmer, with minimum temperatures around 25°C (77°F) and average highs reaching approximately 29°C (85°F). The month also experiences significantly more rainfall, averaging 123 mm (4.8 in) over 17 days, contributing to a humidity level of 82%. In contrast, April tends to be slightly cooler, with temperatures ranging from a minimum of 23°C (74°F) to a maximum of 28°C (82°F). April sees less precipitation as well, with an average of only 41 mm (1.6 in) spread over 10 days, resulting in a lower humidity of 78%. For a detailed look at the weather conditions in April, you can visit Saint Croix weather in April.
When comparing the weather in August and May, we can see some notable differences. August tends to be warmer with an average temperature of 28°C (82°F) and a maximum of 29°C (85°F), while May features slightly cooler averages at 26°C (80°F) and a maximum of 28°C (83°F). Additionally, August experiences significantly more rainfall, receiving 123 mm (4.8 in) over 17 days compared to May’s 57 mm (2.2 in) over 13 days. Humidity is also higher in August at 82%, compared to 79% in May, making August feel a bit more oppressive. For more detailed information about Saint Croix's weather in May, you can explore Saint Croix weather in May.
When comparing the weather in August and June, both months maintain similar temperatures, with average highs around 29°C (84-85°F). However, August tends to be slightly warmer, with a minimum temperature of 25°C (77°F) and an average of 28°C (82°F). In contrast, June has a marginally lower average temperature of 27°C (81°F) while also starting at the same minimum of 25°C (77°F). Notably, August experiences considerably higher precipitation, with 123 mm (4.8 in) over 17 days, compared to June's 59 mm (2.3 in) over the same number of days. Humidity levels are fairly comparable, with August at 82% and June at 81%. For more detailed insights, you can check the weather specifics for June using this link: Saint Croix weather in June.
In August, the weather in Saint Croix is characterized by slightly warmer temperatures compared to July, with a minimum temperature of 25°C (77°F) and an average of 28°C (82°F), while July's minimum also starts at 25°C (78°F) but has a slightly lower average of 27°C (82°F). The maximum temperatures remain consistent, peaking at 29°C (85°F) in August and 29°C (84°F) in July. When it comes to precipitation, August sees an increase to 123 mm (4.8 in) over 17 days, compared to July's 92 mm (3.6 in) over 19 days, indicating that while August is wetter, it has fewer rainy days. Humidity levels are relatively similar, with August at 82% and July at 83%. For more detailed information about July weather, you can check Saint Croix weather in July.
In August, the weather typically features a minimum temperature of 25°C (77°F) and averages around 28°C (82°F), with a maximum also reaching 29°C (85°F). However, it is a wetter month, with 123 mm (4.8 in) of precipitation spread over 17 days and a high humidity level of 82%.
As we transition into September, the temperatures remain consistent with similar minimum, average, and maximum figures—25°C (78°F), 28°C (82°F), and 29°C (85°F), respectively. Nonetheless, September experiences an increase in precipitation, totaling 156 mm (6.2 in) over 20 days, while humidity slightly decreases to 80%.
For more details on the weather in September, you can visit Saint Croix weather in September.
The weather in August and October shows some similarities, but also distinct differences. Both months experience warm temperatures, with October averaging slightly lower (27°C or 82°F) compared to August (28°C or 82°F). Humidity levels are also quite close, with October at 79% and August peaking at 82%. However, October receives marginally more rainfall, with 130 mm (5.1 in) over 18 days, while August sees 123 mm (4.8 in) over 17 days. For more detailed insights into the climate in October, check out Saint Croix weather in October.
In August, the weather is characterized by warmer temperatures, with a minimum of 25°C (77°F) and an average temperature of 28°C (82°F), reaching a maximum of 29°C (85°F). However, this month also experiences higher precipitation, with 123 mm (4.8 in) falling over 17 days, and humidity levels peaking at 82%. In contrast, November brings a slight reduction in temperature, with an average of 27°C (81°F) and maximums close to 28°C (83°F), while precipitation decreases to 98 mm (3.9 in), still spanning 17 days. Humidity also drops slightly to 79%, making November feel a bit more comfortable overall. For more detailed information on November weather, visit Saint Croix weather in November.
August generally features warmer and wetter conditions compared to December. With an average temperature of 28°C (82°F) and significant humidity at 82%, August experiences more precipitation, totaling 123 mm (4.8 in) over 17 days. In contrast, December offers slightly cooler temperatures, with an average of 26°C (79°F) and lower humidity at 78%. Additionally, rainfall is reduced to 50 mm (2.0 in) over just 16 days, making it a drier month overall. For more detailed information, you can refer to Saint Croix weather in December.
August in Saint Croix brings a vibrant, tropical warmth, with temperatures peaking at around 29°C (85°F), making it one of the hottest months of the year. This time of year, humidity levels rise to a steamy 82%, creating that characteristic Caribbean feel. Unlike the drier months, August experiences an uptick in precipitation, with rain gracing the island on roughly half the days of the month. Visitors can expect a lush, green landscape but should be prepared for occasional showers. Whether you're lounging on the beach or exploring, the August weather adds a unique twist to your Saint Croix experience. For a deeper dive into what to expect throughout the year, check out Saint Croix Climate.