September · Senegal
Best time to visit Saint-Louis in September Weather, crowds & prices
Weather in Saint-Louis in September
Average temperature 29°C, 119 mm of rain, about 25 days with 6+ hours of sunshine and 78% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
4.7/10
Ranked #11 of 12 months
- Avg temp
- 29°C
- Rainfall
- 119 mm
- Humidity
- 78%
- Days with 6h+ sun
- 25
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $ · Budget Friendly ($)
September in Saint-Louis scores 4.7/10 for sightseeing and cultural travel - ranked #11 of 12. Expect around 29°C, 119 mm of rain, and roughly 25 days with 6+ hours of sunshine this month.
Saint-Louis spreads across islands at the Senegal River mouth, with colonial houses, a steel bridge and fishing boats.
September in Saint-Louis: expect compromises
September averages 29°C (83°F) and humidity near 78%, so the practical pattern is early mornings, a long midday break, and evenings back outside.
Monthly rainfall reaches 119 mm — wet for this destination — but about 25 days with 6+ hours of sunshine still break through, so keep one indoor fallback in the plan.
It scores 4.7/10 here, 11th of 12 months, against 8.7/10 in the destination's best month.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Plan for low-season pricing, with crowds are light for this destination.
Flexible dates? January scores 4 points higher here — enough to change the trip.
Frequently asked
- What is the weather like in Saint-Louis in September?
- In September, Saint-Louis averages 29°C, 119 mm of rain, and about 25 days with 6+ hours of sunshine. Its climate-comfort score is 4.7/10.
- Is September a good time to visit Saint-Louis?
- September earns a 4.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Saint-Louis in September?
- Expect about 119 mm of rain in September. Average humidity is 78% and there are about 25 days with 6+ hours of sunshine.
Curated in Saint-Louis
Tickets & experiences
Things to do in Saint-Louis
Saint-Louis, Senegal. Live activities and tours from GetYourGuide, matched to this destination.