
Weather
St Thomas Island weather is slightly cooler than other Caribbean island groups owing to the proximity to the continental North American cold air systems. Clothing adequate for St Thomas Island weather includes lightweight or tropical, cottons all year round. Light raincoats are useful, since St Thomas Island weather has a wet season. St Thomas Island weather temperatures average around 20°C (68°F) during the winter season, and 30°C (86°F) during the summer. St Thomas Island weather presents a fairly high humidity, particularly in the summer.