St. Croix has a tropical savanna climate, which means we do experience quite a bit of rainfall during certain months of the year. Rainfall is most likely around November, typically occurring on almost half of the days that month, and is least likely around mid-April 6. Throughout the year, the most common forms of precipitation are light rain, moderate rain, and heavy rain. During hurricane season however, officially June 1 through November 30 each year, the likelihood of heavy rain and thunderstorms increases drastically. The good news is, most of the year rain showers only last 10 or 15 minutes and leave behind blue skies and colorful rainbows.

During the warm season, which lasts from early June to mid-October, there is a 39% average chance that it will rain at some point during the day. When rainfall does occur it is most often in the form of light rain, with 48% of days with precipitation have at worst light rain. Since the warm season also spans most of the hurricane season, there are also chances of heavy rain (23%), moderate rain (22%), and occasionally thunderstorms (8%).

During the cool season, which lasts from mid-December to mid-March, there is a 38% average chance that it will rain at some point during the day. When rainfall does occur it is most often in the form of light rain, with 59% of days with precipitation have at worst light rain. Throughout the cool season there are also days with moderate rain (27%) and heavy rain (14%).