Saint-Louis (SN) in September
In September, Saint-Louis (SN) averages 31°C (89°F) during the day and 26°C (79°F) at night, with around 9 days of rain (60 mm total).
ShoulderConditions are warm and beach-friendly. Occasional showers are likely but won't dominate.
September in Saint-Louis (SN) is outside the typical sweet spot for sightseeing weather. It can still be a great time to visit if you have specific reasons (festivals, off-season pricing, etc.).
How September compares to the rest of the year in Saint-Louis (SN)
September is in the middle of the year for warmth in Saint-Louis (SN) (4th of 12) and one of the wettest months (1st of 12). Daytime temperature runs 1°C above the annual average (31°C). September runs 1°C warmer than August (30°C) and warms a further 2°C into October (33°C).
September sunrise & sunset in Saint-Louis (SN)
Times shown for Saint-Louis (SN) local time (Africa/Dakar), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Saint-Louis (SN) — September
Golden-hour and blue-hour windows for the 15th of September, in Saint-Louis (SN)'s local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Saint-Louis (SN) in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Saint-Louis (SN)'s popularity.
Crowds & pricing — September in Saint-Louis (SN)
Saint-Louis (SN) is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Sun & mosquito risk — September in Saint-Louis (SN)
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Saint-Louis (SN) in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 30°C / 87°F | 19°C / 66°F | 1 mm | 0 | — |
| February | 30°C / 86°F | 19°C / 67°F | 0 mm | 0 | — |
| March | 30°C / 87°F | 19°C / 67°F | 0 mm | 0 | — |
| April | 30°C / 86°F | 20°C / 68°F | 0 mm | 0 | — |
| May | 29°C / 84°F | 21°C / 69°F | 1 mm | 0 | — |
| June | 30°C / 85°F | 23°C / 73°F | 4 mm | 1 | — |
| July | 30°C / 85°F | 25°C / 76°F | 16 mm | 3 | — |
| August | 30°C / 86°F | 26°C / 78°F | 58 mm | 8 | — |
| September | 31°C / 89°F | 26°C / 79°F | 60 mm | 9 | — |
| October | 33°C / 92°F | 26°C / 78°F | 9 mm | 2 | — |
| November | 34°C / 92°F | 23°C / 73°F | 0 mm | 0 | — |
| December | 32°C / 89°F | 20°C / 68°F | 0 mm | 0 | — |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Saint-Louis (SN) in September →
Frequently asked questions
How hot is Saint-Louis (SN) in September?
In September, Saint-Louis (SN) averages a high of 31°C (89°F) and a low of 26°C (79°F) — generally hot.
Does it rain a lot in Saint-Louis (SN) in September?
September sees occasional rain in Saint-Louis (SN), with about 9 rainy days on average.
Is September a good time to visit Saint-Louis (SN)?
September is hot. It suits travelers who are comfortable with hot weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Saint-Louis (SN) in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen. See the full September packing list for Saint-Louis (SN) for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.