Weather in St. Martin in September

Though St. Martin and Sint Maarten tend to be sunny and dry, September throws a few more thunderstorms into the mix. While this may be related to the tropical storms brewing over the Atlantic this time of year, it's rare that St. Martin experiences dangerous weather. Sunny skies can still be expected most of the day.

Typical Weather in September

During September the temperatures in St. Martin typically vary between a daily high of about 88.0 degrees and a daily low of approximately 80.0 degrees.


St. Martin in September: Key Facts
Monthly Averages
High Low Rainfall
No. of Days
with Rain
88.0° F 80.0° F 4.6 N.A.

On any given day during September in St. Martin, you can expect early morning temperatures to be around 83.1 degrees. In September, temperatures typically rise to around 87.3 degrees by early afternoon. The temperature in St. Martin will typically decline by early evening, to approximately 82.1 degrees. For the month of September as a whole, temperatures in St. Martin average around 84.0 degrees.


September Temperatures in St. Martin by Time of Day
Early Morning Late Morning Early Afternoon Late Afternoon Early Evening Overall
83.1° F 86.7° F 87.3° F 84.9° F 82.1° F 84.0° F



Rain is most likely to occur around 7:00 AM during the month of September, and it is least likely to occur around 4:00 AM. In St. Martin during September, thunderstorms -- when they occur -- are most likely sometime around 10:00 PM.


September Rainfall in St. Martin by Time of Day
  Percent Frequencies of Hourly Observations
Hour Rain
1:00 AM 13.7 % 2.6 %
4:00 AM 12 % 1.7 %
7:00 AM 18.5 % 1.9 %
10:00 AM 16 % 1.3 %
1:00 PM 15.2 % 1.6 %
4:00 PM 16.7 % 1.1 %
7:00 PM 13.9 % 2.4 %
10:00 PM 15.7 % 2.9 %
ALL 15.6 % 1.9 %


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