Saint-Louis Weather in September
September in Saint-Louis averages 29°C (84°F) during the day and 26°C (79°F) at night. Quite a bit of rainfall is typical this month, with around 159 mm (6.3 in) on average. An umbrella is a good idea.
Rainfall in Saint-Louis in September
Climate statistics over the past 30 years suggest around 20 days of rain, with 159 mm (6.3 in) average for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.
Temperature in Saint-Louis in September
September in Saint-Louis brings high temperatures, with highs of 29°C (84°F) and nights around 26°C (79°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights remain warm at around 26°C (79°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.
Sunshine in Saint-Louis in September
The city usually sees around 218 hours of sunlight, indicating many sunny days — a great month for sightseeing.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Saint-Louis. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Guadeloupe, check out our Saint-Louis's climate page.
Saint-Louis Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Chance of Rain
66%
Precipitation
159 mm (6.3 in)
Rainy days
20 days
Humidity
82% *
Sunshine
218 hours *
Percentage Sunshine
*
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Saint-Louis typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather for Saint-Louis in September
Browse day-by-day weather records for Saint-Louis spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Saint-Louis historical weather extremes in September
According to our 35 years of weather records for Saint-Louis, the following extremes were recorded between 1990 and 2025.
- The warmest day in September was on September 1, 2005, with a maximum of 34°C (93°F).
- The lowest daytime temperature in September was 25°C (77°F), recorded on September 14, 2004.
- The coldest night in September in Saint-Louis was on September 8, 2023, with a minimum of 10°C (50°F).
Best Places in Guadeloupe in September
Find out more about the weather in Guadeloupe and which places have the best travel conditions in this month. See all of Guadeloupe in September →
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What to Wear in Saint-Louis in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Saint-Louis in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Guadeloupe, check out our Saint-Louis's climate page.
Temperature Rainfall Sunshine Humidity
See the full Saint-Louis climate overview or explore weather in Guadeloupe.
