Last updated: August 21, 2025
In September, Bamako, Mali experiences a blend of warmth and humidity, with maximum temperatures reaching 34°C (94°F) and an average of 26°C (80°F), while nighttime lows settle around 21°C (70°F). The month is marked by considerable precipitation, totaling 162 mm (6.4 in) across 19 rain-soaked days, which contributes to a high humidity level of 85%. This combination of heat and moisture creates a lush atmosphere, characteristic of the city's transition from the dry season to the rains, inviting both challenges and vibrant life to the region's landscape.
September in Bamako, Mali, marks a transition into the milder end of the year, as temperatures begin to cool slightly after the intense heat of summer. With minimums around 21°C (70°F) and an average of 26°C (80°F), the city enjoys a more comfortable climate compared to the sweltering months prior. The maximum temperature peaks at 34°C (94°F), indicating that while the weather is still warm, it offers a respite from the extreme highs of the earlier months. This gradual drop in temperature, alongside the onset of the rainy season, sets the stage for a refreshing change, making September an inviting time to experience Bamako's vibrant culture and outdoor life.
September marks a significant transition in Bamako's weather patterns, with precipitation totaling 162 mm (6.4 in) over 19 days, contributing to the region's rich rainy season. Following the peak rainfall months of July and August, where precipitation soared to 240 mm (9.4 in) and 299 mm (11.8 in) respectively, September experiences a noticeable decline; however, it remains a vital contributor to the annual totals. This month serves as a bridge, gradually reducing moisture levels while still providing ample rainfall that supports the lush greenery in the aftermath of the intense rainy season. As the wet season wraps up, the decline in precipitation signals the onset of drier months ahead, with October bringing a further reduction to 54 mm (2.1 in). The rhythm of rainfall in September illustrates Bamako's unique climate dynamics, ripe for agricultural growth yet hinting at the dry season to come.
In Bamako, Mali, September marks the peak of humidity, maintaining a stifling 85%, a trend that begins in June and continues through August. This period of elevated humidity serves as a stark contrast to the arid air of the earlier months, where January and February boast humidity levels as low as 11%. As the rainy season unfolds, humidity surges dramatically, especially from May onward, reflecting the moisture-laden winds that sweep across the region. Following September, a notable decline occurs, with October witnessing a drop to 75%, signaling a gradual shift toward the dryer months of November and December. This cyclical pattern of humidity in Bamako intricately weaves the region's climatic rhythm, emphasizing the intensity of the wet season.
In September, Bamako, Mali experiences an intense UV Index of 14, categorizing this period as extreme for sun exposure. This marks the peak of the year's UV ratings, which have steadily escalated since the beginning of the year. With a consistent burn time of just 10 minutes, it's crucial for residents and visitors alike to take precautions against sun damage. The trend from January to September showcases a relentless rise in UV levels, peaking in the late summer months before slightly declining in October. As the sun remains fierce, staying informed and protected is essential; for more details, check out the Bamako UV Index.
UV Risk Categories
September in Bamako, Mali, brings a delightful warmth as the city basks in approximately 301 hours of sunshine. This month marks a subtle shift from the summer peak, where May shines the brightest with 339 hours. As the rainy season begins to wane, the sun’s embrace steadily tames, creating a comforting atmosphere perfect for outdoor adventures. Following the vibrant days of August, which saw 280 hours of sunlight, September’s rays encourage exploration while hinting at the approaching cooler months of October and November, both offering an average of over 310 hours. This gradual transition not only signifies a moderation in intensity but also a characteristically vibrant period for both residents and visitors to experience the dynamic beauty of Bamako.
In Bamako, Mali, the likelihood of enjoying sunny weather sees a notable decline throughout the summer months, with August experiencing a mere 20% chance of sunshine. This trend begins to shift as September rolls in, offering a significantly improved 46% chance of sun, making it a more favorable time for outdoor activities compared to the previous months. Although this percentage is still modest in comparison to the sun-drenched early months of the year, such as January with an impressive 81%, it marks a transition toward more stable weather. As the rainy season recedes, residents and visitors can look forward to more opportunities to bask in the sun during this month, even as October shows a slight dip back to 42%.
In Bamako, Mali, the rhythm of daylight reveals a captivating trend throughout the year. Starting with around 11 hours of daylight in January and February, the days gradually lengthen as spring approaches, reaching a peak of 12 hours from March through September. This steady illumination reflects the sun’s consistent presence during the warmer months, allowing for vibrant outdoor activity and exploration. As summer fades into autumn, daylight begins to taper off again, returning to 11 hours in October, reinforcing the cyclical nature of the seasons. Overall, September stands as a transition month, where the equatorial sun continues to bathe the city in warmth and light, setting the stage for the shift that follows.
As the sweltering summer months transition into the cooler embrace of autumn in Bamako, Mali, September marks a distinct shift in wind patterns. With an average wind speed of 2.0 m/s (4 mph), the breezes become noticeably gentler compared to the preceding months. This decline in wind intensity is part of a broader trend observed from June through September, where the gusts progressively weaken, culminating in the softest winds of the year. In contrast to the lively breezes of December and January, which reach 3.1 m/s (7 mph), September's whispers of wind create a tranquil atmosphere, inviting residents to savor the lingering warmth as they anticipate the cooler conditions of the months ahead. The calming winds set the stage for the vibrant life that thrums in the bustling streets of Bamako, signaling both a change in season and a time for reflection amidst the gentle rustle of leaves.
Weather in Bamako varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Bamako, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present stark contrasts in weather. In September, temperatures range from a minimum of 21°C (70°F) to a maximum of 34°C (94°F), with an average temperature of 26°C (80°F). This month is notably humid, with 85% humidity and significant precipitation of 162 mm (6.4 in) over 19 days. In contrast, January features cooler temperatures, ranging from a minimum of 12°C (53°F) to a maximum of 38°C (100°F), with an average of 24°C (76°F). Uniquely, January experiences no rainfall, humidity dropping dramatically to only 12%. For more specifics about January weather, check out Bamako weather in January.
September typically presents a warm and humid climate, with daily temperatures ranging from a minimum of 21°C (70°F) to a maximum of 34°C (94°F) and an average of 26°C (80°F). The month is characterized by significant rainfall, totaling 162 mm (6.4 in) over about 19 days, contributing to high humidity levels around 85%. In contrast, February enjoys a much drier and hotter atmosphere, featuring temperatures that range from a minimum of 15°C (60°F) to a peak of 39°C (103°F), with an average temperature of 27°C (82°F). Notably, February experiences no rainfall, maintaining a low humidity level of 11%. For more detailed insights, you can explore Bamako weather in February.
September and March present strikingly different weather conditions. September typically sees milder temperatures with a minimum of 21°C (70°F) and an average of 26°C (80°F), peaking at 34°C (94°F). This month is characterized by significant rainfall, averaging 162 mm (6.4 in) over 19 days, accompanied by high humidity levels of 85%. In contrast, March experiences much warmer temperatures, with a minimum of 13°C (56°F) and an impressive average high of 31°C (88°F), reaching scorching maximums of 42°C (107°F). Notably, March is extremely dry, with only 2 mm (0.1 in) of precipitation recorded, and no rainy days, resulting in a low humidity level of 13%. These differences highlight the transition from the humid, rainy season of September to the dry heat of March. For more details, check out Bamako weather in March.
In comparing the weather between September and April, we find significant differences. September features cooler temperatures with a minimum of 21°C (70°F) and an average of 26°C (80°F), peaking at 34°C (94°F). Additionally, it is a much wetter month, receiving 162 mm (6.4 in) of precipitation over 19 days, resulting in high humidity levels of 85%. In contrast, April experiences much hotter temperatures, with a minimum of 21°C (69°F), an average of 33°C (91°F), and soaring to a maximum of 42°C (108°F). Moreover, April is characterized by its dryness, receiving only 9 mm (0.4 in) of rainfall over just one day and maintaining a much lower humidity of 22%. For more details, you can check Bamako weather in April.
When comparing the weather in September and May, distinct differences emerge. September tends to be cooler, with average temperatures ranging from a minimum of 21°C (70°F) to a maximum of 34°C (94°F), while May experiences higher temperatures, with a minimum of 23°C (73°F) and maxing out at a scorching 43°C (110°F). Additionally, September is significantly wetter, with 162 mm (6.4 in) of precipitation over 19 days, in contrast to May, which sees only 21 mm (0.8 in) over just 5 days. Humidity levels also differ, as September boasts a high humidity of 85%, while May's humidity is much lower at 42%. For a closer look at the weather specifics in May, you can check Bamako weather in May.
September and June showcase distinct weather characteristics. In September, temperatures range from a pleasant minimum of 21°C (70°F) to a maximum of 34°C (94°F), with an average of 26°C (80°F). However, this month experiences significantly more rainfall, totaling 162 mm (6.4 in) over 19 days and maintaining high humidity at 85%. In contrast, June presents higher temperatures, with a minimum of 21°C (71°F), an average of 30°C (86°F), and peaks at a scorching 41°C (105°F). Rainfall is much lighter in June, totaling 66 mm (2.6 in) across just 12 days, and the humidity is relatively lower at 75%. For a more detailed look at June weather, you can visit the following link: Bamako weather in June.
In comparing the weather between July and September, both months exhibit warm temperatures, but July tends to be hotter overall, with average highs reaching up to 36°C (96°F) compared to September's maximum of 34°C (94°F). Both months start with a minimum temperature around 21°C (70°F), but September's average temperature slightly cools to 26°C (80°F) from July's 27°C (81°F). Rainfall is more prevalent in July, with 240 mm (9.4 in) over 25 days, compared to September's 162 mm (6.4 in) across 19 days, contributing to a more humid environment in September at 85% relative humidity compared to July's 78%. For more detailed insights, you can explore Bamako weather in July.
In comparing the weather between August and September, both months experience similar average temperatures, hovering around 26°C (79°F to 80°F). However, September stands out with slightly higher minimum temperatures of 21°C (70°F) compared to August's 20°C (69°F). Despite the similar maximum temperatures, September sees a significant decrease in rainfall, receiving only 162 mm (6.4 in) over 19 days, while August is notably wetter with 299 mm (11.8 in) across 25 days. Both months maintain a high humidity level of 85%. For more detailed information on August weather patterns, you can check Bamako weather in August.
In September, the weather is characterized by higher humidity levels at 85% and significant rainfall, totaling 162 mm over 19 days, with temperatures ranging from a minimum of 21°C (70°F) to a maximum of 34°C (94°F). In contrast, October sees a decrease in both humidity and precipitation, with levels dropping to 75% and 54 mm over just 11 days. The average temperature in October is slightly higher at 28°C (82°F), and the maximum can reach up to 37°C (100°F). For more detailed insights, you can check Bamako weather in October.
September and November present contrasting weather patterns. In September, the temperature ranges from a minimum of 21°C (70°F) to a maximum of 34°C (94°F), with an average temperature of 26°C (80°F). This month experiences significant rainfall, with a total of 162 mm (6.4 in) spread over 19 days, resulting in high humidity levels of 85%. In contrast, November sees a more extreme temperature range, with a minimum of 13°C (56°F) and a maximum soaring to 38°C (100°F), while the average remains at a warm 28°C (82°F). Remarkably, November enjoys completely dry conditions, recording no precipitation and lower humidity at just 33%. For more insights into November weather, check out Bamako weather in November.
In September, the weather features a warm and humid atmosphere, with temperatures ranging from a minimum of 21°C (70°F) to a maximum of 34°C (94°F) and an average of 26°C (80°F). This month is marked by significant rainfall, totaling 162 mm (6.4 in) over 19 days, resulting in an humidity level of 85%. In contrast, December presents a much drier and cooler climate, as temperatures can reach a maximum of 38°C (100°F), although the minimum drops to 13°C (55°F) with a comfortable average of 25°C (78°F). Remarkably, December sees no precipitation at all, with a humidity level of just 15%. For more details on December weather, check out this link: Bamako weather in December.
As September unfolds in Bamako, the weather transitions into a more humid phase, setting it apart from the drier months. With average temperatures hovering around 26°C (80°F), the days can feel quite warm, particularly with highs reaching up to 34°C (94°F). This increase in warmth is accompanied by significant precipitation, as residents experience about 19 rainy days throughout the month, totaling 162 mm (6.4 in) of rain. The heightened humidity, often around 85%, adds an additional layer of weather complexity, making it feel more tropical compared to the preceding dry season. For more in-depth information on what to expect throughout the year, check out Bamako Climate.