September weather forecast
United States Virgin Islands, USA

September in the United States Virgin Islands is characterized by its place within the climax of the wet season, while also standing at the apex of the hurricane season. Temperatures during this month maintain a range from a tropical 79°F (26.1°C) during the cooler nights to a torrid peak of 90°F (32.2°C) as the day progresses.

In relation to August, September sustains the heat and oppressive humidity that have become synonymous with this period. Rain showers, often accompanied by thunderstorms, are both regular and pronounced, predominantly during the afternoons and evenings. In fact, September often contends for the title of the rainiest month of the year.

The capital, Charlotte Amalie in Saint Thomas, usually experiences weather patterns reflective of the broader archipelago. Nonetheless, its urban sprawl combined with the heat characteristics of its harbor can sometimes intensify the warmth, particularly during mid-day.

Rainfall in September is more than just frequent showers; it can manifest as extended, heavy downpours. This is further complicated by the fact that the surrounding seas, while boasting temperatures from 86°F (30°C) to 88°F (31.1°C), can become turbulent due to weather disturbances. Thus, while the water remains warm, marine activities might be affected by the unstable weather.

The day-to-night duration remains equitably balanced due to the islands' equatorial proximity. Crucially, September is a month of heightened weather vigilance for the United States Virgin Islands. The possibility of encountering tropical storms or even full-fledged hurricanes is considerably amplified, making it imperative for residents and visitors alike to be well-informed and prepared.

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• Charlotte Amalie - September »
  With an average ocean temperature of 84.9°F (29.4°C), September is the month with the warmest seawater in Charlotte Amalie, United States Virgin Islands. September is the month with the warmest seawater in Charlotte Amalie, United States Virgin Islands, with an average ocean temperature of 84.9°F (29.4°C).
• Frederiksted - September »
  In Frederiksted, United States Virgin Islands, during September, the rain falls for 22.8 days and regularly aggregates up to 4.09" (104mm) of precipitation. On the first day of September in Frederiksted, United States Virgin Islands, sunrise is at 6:05 am and sunset at 6:33 pm.
• Saint John - September »
  The months with the highest UV index in Saint John, United States Virgin Islands, are March through September, with an average maximum UV index of 12. September and October, with an average ocean temperature of 84.2°F (29°C), are months with the warmest seawater in Saint John.
• Virgin Islands National Park - September »
  With an average ocean temperature of 84.9°F (29.4°C), September is the month with the warmest seawater in Virgin Islands National Park. In September, the sea temperature reaches a high of 85°F (29.4°C) in the Virgin Islands National Park, maintaining the trend from the previous month.
• Kingshill - September »
  In Kingshill, in September, during 22.8 rainfall days, 4.09" (104mm) of precipitation is typically accumulated. In Kingshill, in September, it is raining for 22.8 days, with typically 4.09" (104mm) of accumulated precipitation.