Grand Case weather in September (Saint Martin)

Planning a trip to Grand Case in September? Check out this comprehensive weather guide.

In September, Grand Case generally has high temperatures and high rainfall. Throughout the daytime, temperatures often hover around 30°C. However, as the sun sets and evening approaches, there's a noticeable cool-down, with temperatures gently dropping to a more temperate 27°C.

Keep in mind that while these are the average temperatures, there can be days that are even hotter. It's essential to be prepared for such heat. Wearing light, breathable fabrics and protecting yourself from the sun's intensity with hats or shades can make a difference. Hydration is key, so remember to drink plenty of water, especially if you find yourself outdoors for extended periods.

Grand Case in September usually receives high rainfall, averaging around 134 mm for the month. Based on our climate data of the past 30 years, about 19 days of rain are anticipated.

With around 232 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Grand Case. January, February, March, April, May, June, July and December generally stand out with the best circumstances. While September tends to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Grand Case climate page with graphs.

 

Grand Case, monthly averages in September

Min TemperatureMin Temperature 27°C  
Max TemperatureMax Temperature 30°C  
Water TemperatureWater Temperature 29°C *  
Chance of RainChance of Rain 62%  
PrecipitationPrecipitation 134 mm  
Rainy daysRainy days 19 days  
HumidityHumidity 78% *  
WindspeedWindspeed 18 km/h *  
SunshineSunshine 232 hours *  
Percentage SunshinePercentage Sunshine 61% *  
* Data from: Sint Maarten, Sint Maarten (8 KM, 5 Miles).

Where to go in Saint Martin in September

Find out more about the weather in Saint Martin in September and which places have the best weather conditions in this month.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Grand Case in September?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case. With a water temperature of around 29°C this is a great month to swim so bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do in September.

Swimming
9/10
Cycling
7/10
Walking
7/10
Camping
7/10
Outdoor sports
7/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Grand Case.

Our site offers climate and forecast data for every country in the world. Are you going to Saint Martin? On this website you can find historical weather averages for many cities in Saint Martin. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.