The nice thing about St Barts weather is how it stays about the same all year around, with average highs in the coastal areas around 85°F (29.4°C) and the average coastal lows are around 73°F (22.8°C). The inland and higher elevation areas experience average highs around 81 degrees and the average lows are approximately 66°F (18.9°C). The warm coastal water temperatures are usually between 68°F (20°C) and 74°F (23.2°C).
St Barts dry season is from December to May. June brings the wet season, which is not really that wet but it does get quite humid. Rain showers can pass through at anytime of the year but are usually very brief, and during the late summer and fall wet season, evening showers are more common.
St Barts endures hurricane season from July to November, and a lot of the tourists come to enjoy the weather in St Barts after the hurricane season is over (and before it starts again). Historically, most hurricanes happen there in September and this Caribbean island has only experiences a hurricane once or twice on average every 10 years. As a result, the chances of being there as a tourist when one passes through are very slim, making anytime of year a great time to visit.
To summarize it all, St Barts has really nice tropical island weather all year around.
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