Saint Martin Weather in September

Saint Martin in September sees high temperatures, with highs around 30°C (86°F) and overnight lows of 27°C (81°F). Rainfall is fairly high at around 134 mm (5.3 in) on average, so pack waterproofs just in case.

Rainfall in Saint Martin in September

Expect around 19 days of rain based on historical data, with 134 mm (5.3 in) average. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.

Temperature in Saint Martin in September

Daytime temperatures in Saint Martin reach 30°C (86°F) in September, dropping to 27°C (81°F) at night. This kind of day-to-night contrast is typical for this time of year. Nights are warm at 27°C (81°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.

Sunshine in Saint Martin in September

Enjoy a sunny month with about 232 hours of sunshine, the clear skies make Saint Martin even more beautiful.

Wind Speed in Saint Martin in September

Average wind conditions reach 5 m/s (10 knots) in September. This creates lively weather with fresh winds that make small trees sway noticeably. Remember this is an average: some days are less windy while others have particularly active windy conditions.

Average water temperature in September

At 29°C (84°F), the water is very warm, more like a heated pool than the sea. Great for those who like warm water, though some may find it less refreshing on a hot day.

September in Saint Martin can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.