Last updated: August 31, 2025
In September, Saint-Louis, Senegal experiences warm and humid weather, with maximum temperatures soaring to 34°C (94°F) and an average of 28°C (83°F). This month typically sees a minimum temperature of around 25°C (77°F), creating a tropical climate perfect for those who enjoy heat. Despite the warmth, rainfall is common, with an average precipitation amount of 49 mm (1.9 in) falling over approximately 6 days. The humidity level stands at a significant 81%, adding to the lush atmosphere of this vibrant coastal city.
In September, Saint-Louis, Senegal, experiences a warm transition into the fall, marked by a minimum temperature of 25°C (77°F) and an average of 28°C (83°F). This month typically sees highs reaching up to 34°C (94°F), making it one of the hotter periods of the year. Notably, as the temperature rises from August, which averages at 27°C (81°F), September represents a peak in warmth before the cooler months come to play. Coupled with the humidity, these conditions create a vibrant and sultry atmosphere, ideal for experiencing the city's unique culture and beautiful landscapes.
In September, Saint-Louis, Senegal, experiences a noticeable peak in precipitation, with 49 mm (1.9 in) of rain falling across 6 days. This increase follows the marked rise seen in August, where 48 mm of rain is recorded over 7 days, highlighting the late rainy season's intensity. The precipitation levels in September signal a transition as the region approaches the drier months ahead, notably when rainfall plummets to nearly zero from November onwards. The moderate rains of September not only contribute to the lush green landscapes of the region but also play a crucial role in replenishing water resources before the long, dry stretch begins.
September in Saint-Louis, Senegal, marks a notable peak in humidity, reaching 81%, which is the highest level recorded throughout the year. This increase follows a steady rise from 28% in January to 79% in August, signifying a significant shift as the region progresses through the rainy season. As the air becomes heavier and more saturated with moisture, residents experience a palpable change in the atmosphere. The transition from the dryer months to September's humidity sets the stage for a cooler, refreshing period ahead, before the levels gradually decline to 78% in October. Overall, September stands out as a clear indicator of the tropical climate's influence, demonstrating how humidity plays a crucial role in defining the seasons of this vibrant region.
In September, Saint-Louis, Senegal experiences a consistently high UV Index of 13, which falls into the extreme exposure category, indicating a burn time of just 10 minutes. This trend of elevated UV levels has been a hallmark since March, with values peaking at 14 in April before stabilizing at 13 during the warmer months. As summer transitions to fall, the UV intensity remains formidable, underscoring the importance of sun protection for residents and visitors alike. The high UV Index is a reminder to stay vigilant against sunburn, resonating with the broader yearly pattern where several months, particularly from March to October, demonstrate extreme levels of solar radiation. For more insights on UV exposure in the region, check out Saint-Louis UV Index.
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September in Saint-Louis, Senegal, ushers in a delightful blend of warmth and sun, with 310 hours of bright sunshine lighting up the days. This month experiences a subtle decrease from the sun-soaked heights of summer, notably May's peak of 353 hours, yet maintains a strong presence in daylight, promising many opportunities for exploration and relaxation. As the year transitions into autumn, the hours of sunshine gradually decline, echoing the earlier months but still outshining the winter season ahead, where months like November and December see significantly fewer sunlit hours at 294 and 298, respectively. September serves as a vibrant reminder of summer’s lingering charm, inviting both locals and visitors to bask in its golden rays before the cooler months arrive.
In Saint-Louis, Senegal, September marks a transitional period in the weather calendar, with a 51% chance of sunny days. Following the vibrant sunny months of March through May, where the probability peaks at 79%, the outlook shifts as summer fades. As August arrives, the chance of clear skies drops significantly to 41%. However, September stabilizes somewhat, providing a balanced mix of sun and clouds. This trend continues into October, sustaining a 51% likelihood of sunny weather. While the sun is not as dominant during this time, visitors can still expect a blend of sunny spells amidst the transitioning season.
September in Saint-Louis, Senegal brings a consistent 12 hours of daylight, reflecting the region's stable climate as it transitions away from the peak summer months. This duration aligns with the previous months of April to August, where the sun graces the city for the same period, creating a harmonious balance of light and shadow that enhances daily activities. As autumn approaches in October, daylight begins to shorten, tapering down to 11 hours, yet September's abundant sunlight continues to invite both locals and visitors to enjoy the vibrant outdoor experiences that define this captivating coastal city. The gradual shift from summer to autumn marks an intriguing rhythm in daylight duration, showcasing Senegal's unique climatic patterns.
As summer transitions to autumn in Saint-Louis, Senegal, September brings a slight uptick in breeze compared to the languid days of August. With an average wind speed of 4.9 m/s (11 mph), the winds are refreshing yet gentle, offering a subtle relief from the heat. While these speeds are modest in comparison to the gusts seen in the earlier months of the year, they mark the beginning of a gradual increase that will characterize the fall months. Following September, the wind speeds begin to rise modestly again in October and November, suggesting a serene but dynamic shift in the coastal atmosphere. This delicate interplay of wind throughout the year encapsulates the unique climatic rhythm of this vibrant region.
Weather in Saint-Louis varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Saint-Louis, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is characterized by warm temperatures, with a minimum of 25°C (77°F) and an average of 28°C (83°F), peaking at a maximum of 34°C (94°F). This month also sees considerable humidity at 81% and an average of 49 mm (1.9 in) of precipitation over about six days. In contrast, January experiences much cooler conditions with a minimum temperature of 16°C (60°F) and an average of 22°C (73°F), reaching a maximum of 31°C (89°F). January is notably dry, boasting no recorded precipitation and a significantly lower humidity level of 28%. For more details, you can check Saint-Louis weather in January.
The weather in September is characterized by warm temperatures, with a minimum of 25°C (77°F) and an average of 28°C (83°F), reaching a maximum of 34°C (94°F). This month also experiences considerable humidity at 81% and around 49 mm of precipitation over six days. In contrast, February offers a much cooler climate, with temperatures ranging from a minimum of 16°C (60°F) to a comfortable average of 22°C (72°F), peaking at 32°C (90°F). Notably, February boasts dry conditions, with no recorded precipitation and significantly lower humidity at 32%. For more details on February weather, you can visit Saint-Louis weather in February.
September and March showcase distinct weather patterns. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 34°C (94°F), with an average of 28°C (83°F). This month is also characterized by higher humidity at 81% and 49 mm (1.9 in) of precipitation over six days, indicating a more tropical climate. In contrast, March features milder temperatures, with a minimum of 17°C (62°F), an average of 22°C (71°F), and the same maximum of 34°C (93°F). Remarkably, March experiences no precipitation, maintaining a dry atmosphere with only 33% humidity. This stark difference highlights the seasonal transition from the wet to the dry months. For more details, you can refer to Saint-Louis weather in March.
September and April present notably different weather patterns. In September, temperatures range from a minimum of 25°C (77°F) to a maximum of 34°C (94°F), with an average of 28°C (83°F). This month is characterized by higher humidity at 81% and some precipitation, totaling 49 mm over an average of 6 days. In contrast, April showcases a broader temperature range, with a minimum of 17°C (62°F) and a maximum reaching up to 36°C (98°F), yielding an average of 22°C (71°F). Unlike September, April is dry, with no recorded precipitation and significantly lower humidity at 39%. For more specifics on April weather, you can check out Saint-Louis weather in April.
September experiences warmer temperatures, with an average of 28°C (83°F), reaching a maximum of 34°C (94°F) and a high humidity level of 81%. This month also sees some rainfall, with about 49 mm (1.9 in) of precipitation over approximately 6 days. In contrast, May offers slightly cooler temperatures, averaging 22°C (72°F) and peaking at 35°C (95°F), but it boasts a completely dry climate with no recorded precipitation and a humidity level of just 50%. For more specific details on May weather in Saint-Louis, visit Saint-Louis weather in May.
In comparing the weather between September and June, September tends to be warmer with average temperatures reaching 28°C (83°F) and highs up to 34°C (94°F). In contrast, June has a cooler average of 25°C (77°F) and peaks at 32°C (90°F). Additionally, September is much wetter, experiencing 49 mm (1.9 in) of precipitation over six days, while June boasts almost no rainfall, recording just 2 mm (0.1 in) with zero rainy days. The humidity is also higher in September at 81%, compared to June’s more comfortable 66%. For more details, you can check Saint-Louis weather in June.
In comparing the weather of September and July, September generally experiences warmer temperatures, with a minimum of 25°C (77°F), an average of 28°C (83°F), and a maximum of 34°C (94°F). In contrast, July's temperatures are milder, with a minimum of 23°C (73°F), an average of 26°C (79°F), and a maximum of 30°C (87°F). Additionally, September has higher humidity at 81%, compared to July's 72%, which can make the warmth feel more intense. Precipitation also varies significantly; September sees 49 mm (1.9 in) over 6 days, while July is much drier, with only 6 mm (0.2 in) on just 1 day. For a detailed look at July's weather, you can check out Saint-Louis weather in July.
In comparing the weather of September and August, we notice that September experiences slightly higher temperatures, with minimums averaging 25°C (77°F) and maximums reaching 34°C (94°F), compared to August's minimum of 24°C (75°F) and maximum of 32°C (90°F). The average temperature in September is also higher at 28°C (83°F), while August sees an average of 27°C (81°F). Precipitation levels remain quite similar, with both months recording around 48-49 mm (1.9 in), although September has one less rainy day, averaging rain on 6 days compared to August's 7 days. Humidity is slightly higher in September at 81%, compared to August’s 79%. For more detailed insights, you can check Saint-Louis weather in August.
In September, the weather features a minimum temperature of 25°C (77°F) and an average of 28°C (83°F), with highs reaching up to 34°C (94°F). This month experiences more humidity at 81% and sees precipitation on six days, totaling 49 mm (1.9 in). In contrast, October remains quite warm, with a slightly lower minimum temperature of 24°C (75°F) and an increase in maximum temperature to 36°C (96°F). The precipitation significantly drops to just 9 mm (0.4 in) and occurs on no days, contributing to a more pleasant humidity level of 78%. For more information about the weather in October, you can check Saint-Louis weather in October.
In September, the weather is warm and humid, with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 34°C (94°F) and an average of 28°C (83°F). The month experiences about 49 mm (1.9 in) of precipitation over six days, contributing to a high humidity of 81%. In contrast, November sees a significant drop in humidity to 55%, with temperatures cooling slightly, peaking at the same maximum of 34°C (94°F) but averaging lower at 26°C (79°F) and reaching a minimum of 20°C (68°F). Notably, November is dry, recording no rainfall over the month, making it a stark contrast to the rainy September. For more detailed weather information, visit Saint-Louis weather in November.
In September, the weather is notably warmer with temperatures ranging from a minimum of 25°C (77°F) to a maximum of 34°C (94°F) and an average of 28°C (83°F). The month experiences significant humidity at 81% and receives approximately 49 mm (1.9 in) of precipitation over six days. In contrast, December offers a much cooler climate, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 33°C (91°F), averaging 24°C (75°F). The month is characterized by dry conditions, with no recorded precipitation and a much more comfortable humidity level of 35%. For more details on December weather, you can refer to Saint-Louis weather in December.
September in Saint-Louis presents a transition in weather, characterized by warm temperatures and relatively high humidity levels. With an average high of 28°C and an average low around 25°C, the month remains balmy, inviting outdoor activities. However, September stands out due to its notable rainfall, accumulating 49 mm over approximately six days, signaling the end of the dry season and paving the way for a more humid climate. This combination of warmth and increased precipitation makes September distinct from the months preceding it, offering a refreshing atmosphere in comparison. For a deeper understanding of the climate patterns year-round, explore Saint-Louis Climate.