The 5 most beautiful lakes in Canada
Explore Canada's stunning lakes: Lake Louise, Lake Superior, Maligne Lake, Emerald Lake, and Lake Okanagan, each offering unique beauty and activities.
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.
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
*
* Data from: Guadeloupe, Guadeloupe (41 KM, 25 Miles).
Saint-Louis Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Saint-Louis - and find the best time to visit.
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 records 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 36 years of weather records for Saint-Louis, the following extremes were recorded between 1990 and 2026.
- 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 →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
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.
-
Swimming8/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Saint-Louis 3-Day Forecast
More climate data for Saint-Louis
Temperature Rainfall Sunshine Humidity
See the full Saint-Louis climate overview or explore weather in Guadeloupe.
Popular in September
Where to go in September - average daytime high across popular destinations.
Bouillante
30°C (86°F) Sainte-Rose
30°C (86°F) Capesterre-Belle-Eau29°C (84°F) Le Moule
29°C (84°F) Deshaies30°C (86°F) Sainte-Anne29°C (84°F) Le Gosier29°C (84°F) Saint-François29°C (84°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
The 5 most beautiful lakes in Canada
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Lake Atitlan: the most beautiful lake in the world
At Lake Atitlan you will be enchanted by beautiful volcanoes, amazing sunsets and the serene tranquility. Mix this with the vibrant Mayan community and you'll understand why Atitlan has something magical.