Last updated: August 21, 2025
In Mombasa, Kenya, September welcomes visitors with warm temperatures averaging 25°C (78°F), peaking at a comfortable 29°C (84°F) and dipping to a mild 22°C (72°F) at night. This month also experiences moderate rainfall, accumulating around 74 mm (2.9 in) over 21 days, leading to a humidity level of 74%. The combination of warmth and occasional showers creates a lush, vibrant environment, making September an inviting time for travelers to explore the coastal beauty of Mombasa.
In September, Mombasa, Kenya, welcomes visitors with pleasantly warm temperatures that evoke a sense of tropical bliss. The average temperature settles around 25°C (78°F), providing a comfortable backdrop for beach activities and explorations. With nightly lows of 22°C (72°F) and daytime highs reaching 29°C (84°F), this month marks a gentle transition as the weather remains consistently mild. As the last days of winter fade, September offers a perfect blend of sun and sea, inviting travelers to indulge in the vibrant coastal lifestyle that this iconic city is known for.
In September, Mombasa experiences a noticeable uptick in precipitation, with 74 mm (about 2.9 in) of rain falling over 21 days. This marks a shift from the drier months of July and August, where rainfall was significantly lower. The increase in moisture hints at the transition towards the peak of the rainy season, which typically unfolds in the following months. As the city moves into October, rainfall intensifies, but September's blend of occasional showers and warm temperatures creates a lush environment, ideal for both flora and fauna. This gradual rise in precipitation not only refreshes the landscape but also underscores Mombasa's climatic rhythm as it prepares for the more robust rainfall that defines this coastal region.
In Mombasa, Kenya, September brings a relative calm in humidity, maintaining a level of 74% that mirrors the more temperate months of January and August. This slight dip follows the peak of the rainy season in May and June, where humidity levels soared to 83% and 86%, respectively. As the coastal city transitions into October, humidity rises again to 78%, hinting at the approaching wet season. Overall, September stands out as a month of balance, where the humidity remains comfortably high but not overwhelming, offering a pleasant experience for both residents and visitors alike.
In September, Mombasa, Kenya, experiences a UV Index of 13, categorized as extreme, where unprotected skin can burn in just 10 minutes. This reflects a slight dip from the peak of 15 seen in March but maintains a consistent warning throughout much of the year. The UV levels in September continue to emphasize the importance of sun safety, aligning with the overall trend of high exposure in Mombasa, where intense sun conditions prevail from January through April. As the season transitions into October, the UV Index remains at 13, signaling that vigilance is crucial for outdoor activities. For more detailed insights on the UV Index throughout the year, visit Mombasa UV Index.
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As the vibrant hues of September settle over Mombasa, the city basks in a generous 339 hours of sunshine, marking the tail end of a captivating dry spell. This month, like its predecessors, continues a delightful trend seen since mid-year, where sunshine hours peak from July's 345 hours to August's impressive 349 hours. September's radiance serves as a perfect prelude to the gradual onset of cloudier October, which still boasts a commendable 342 hours. This consistent availability of sunlight not only brightens the scenery but also invites both locals and tourists to revel in the coastal charm, making it a delightful time to enjoy the beaches and vibrant culture.
September in Mombasa, Kenya, stands out as a month with a remarkable 57% chance of sunny weather, making it one of the sunniest times of the year. This surge in sunshine follows the slightly cooler and cloudier months of April through August, where the likelihood of sun hovered just above the 39% mark. As the region transitions into the dry spell leading into the end of the year, both September and October maintain this high potential for clear skies, further emphasized by the slight increase in sunny days leading into November, which peaks at 59%. This trend indicates that as the month progresses, visitors can expect a vibrant blend of warmth and sunshine, perfect for enjoying Mombasa's stunning beaches and rich cultural offerings.
In Mombasa, Kenya, September stands out as a month of equal daylight, offering 12 hours of sunshine that perfectly sets the tone for the transition into the latter part of the year. Following a series of months with 11 hours from May to August, September marks a return to the consistent 12-hour daylight cycle that characterizes most of the year, alongside January through April and October through December. This rhythmic pattern reflects the region's stable equatorial climate, allowing residents and visitors alike to enjoy the sun's warm embrace, whether for beach adventures or exploring vibrant local culture. As the days begin to shift ever so slightly, September invites a sense of balance amidst the tropical vibrancy.
In September, Mombasa experiences a moderate breeze, with average wind speeds of 5.1 m/s (11 mph). As the transition from the drier months of August to the wetter seasons approaches, the winds hold steady, reflecting a decline from the peak of 6.7 m/s (15 mph) during July. This consistent wind pattern not only provides a refreshing reprieve from the city's tropical warmth but also indicates a gradual slowdown as the year progresses. As September unfolds, the winds signal a shift in the landscape, preparing for the upcoming rains while still maintaining a pleasant atmosphere for both locals and visitors alike. The steady airflow in September embodies Mombasa's unique charm, offering a balance of tranquility amidst its bustling coastal life.
Weather in Mombasa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mombasa, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is characterized by warm temperatures, with a minimum of 22°C (72°F), an average of 25°C (78°F), and a maximum of 29°C (84°F). This month sees considerable rainfall, with 74 mm (2.9 in) of precipitation spread over 21 days, maintaining a humidity level of 74%. In contrast, January experiences slightly warmer temperatures, with a minimum of 23°C (74°F), an average of 28°C (82°F), and a maximum of 32°C (90°F). This month is much drier, with only 14 mm (0.6 in) of precipitation occurring over just 3 days, while humidity remains consistent at 74%. For a detailed perspective on January's weather, visit Mombasa weather in January.
September and February present distinct weather patterns, with September generally being cooler and wetter. In September, temperatures range from a minimum of 22°C (72°F) to a maximum of 29°C (84°F), with an average of 25°C (78°F). This month experiences more rainfall, with a total of 74 mm (2.9 in) spread across 21 days, contributing to a humidity level of 74%. In contrast, February is warmer, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 33°C (92°F), averaging 28°C (83°F). Additionally, precipitation is significantly lower in February, totaling just 18 mm (0.7 in) over about 4 days, and humidity is slightly reduced at 71%. For more detailed information, you can check Mombasa weather in February.
September weather features milder temperatures, with a minimum of 22°C (72°F), an average of 25°C (78°F), and a maximum of 29°C (84°F). The humidity is higher at 74%, and there is more frequent rainfall, totaling 74 mm (2.9 in) over 21 days. In contrast, March brings warmer temperatures, with a minimum of 24°C (76°F), an average of 28°C (83°F), and a peak of 34°C (93°F). Although March has less overall precipitation at 59 mm (2.3 in) over 12 days, it has lower humidity at 69%. For more detailed insights, check out Mombasa weather in March.
In comparing the weather of September and April, September tends to have slightly cooler temperatures, with averages around 25°C (78°F) and maximums reaching 29°C (84°F), while April is warmer, boasting an average of 28°C (82°F) and highs of 33°C (91°F). Precipitation levels also differ significantly; September receives 74 mm (2.9 in) of rain across 21 days, whereas April sees a much higher total of 164 mm (6.4 in) over 27 days. Additionally, humidity is relatively consistent, measuring 74% in September and slightly lower at 70% in April. For more detailed insights, you can explore Mombasa weather in April.
In comparing the weather of September and May, we observe a few notable differences. September features milder temperatures, with a minimum of 22°C (72°F), an average of 25°C (78°F), and a maximum of 29°C (84°F), while May is slightly warmer, with a minimum of 23°C (73°F), an average of 26°C (80°F), and a maximum of 31°C (87°F). In terms of precipitation, September experiences significantly less rainfall with 74 mm (2.9 in) over 21 days, compared to May's heavy downpour of 358 mm (14.1 in) spread across 26 days. Additionally, May's humidity levels are higher, averaging at 83%, compared to September's 74%. For more detailed insights on May weather, you can visit Mombasa weather in May.
In comparing the weather of September and June, both months display similar temperature ranges with minimums around 22°C (72°F) and maximums peaking at 29°C (84°F in September and 85°F in June). However, June tends to be slightly warmer on average, with an average temperature of 26°C (79°F) compared to September's 25°C (78°F). Rainfall also differs notably; September receives 74 mm (2.9 in) of precipitation over 21 days, while June has a higher total of 107 mm (4.2 in) across the same number of days. Additionally, June's humidity level is at 86%, making it feel more humid than September's 74%. For more details on June weather, check out Mombasa weather in June.
In comparison to July, September experiences similar temperature ranges, with both months recording a minimum of 22°C (72°F), an average of 25°C (78°F), and a maximum of 29°C (84°F). However, September sees slightly more precipitation, totaling 74 mm (2.9 in) over 21 days, compared to July's 67 mm (2.7 in) over 22 days. Additionally, humidity levels are lower in September at 74%, while July has a higher humidity of 82%. To learn more about July weather specifics, check Mombasa weather in July.
In comparing the weather of September to that of August, both months share similar temperature ranges, with September maintaining a minimum of 22°C (72°F) and an average of 25°C (78°F), identical to August. However, September experiences slightly higher humidity at 74% compared to August's 75%. Precipitation increases in September with 74 mm (2.9 in) across 21 days, whereas August sees 61 mm (2.4 in) over 19 days. This indicates that September is not only a bit more humid, but also wetter overall. For those interested in more details, you can check out Mombasa weather in August.
In comparing the weather between September and October, both months display warm temperatures with September averaging 25°C (78°F) and October slightly warmer at 26°C (79°F). The minimum temperatures remain consistent at 22°C (72°F), while October sees a peak of 30°C (87°F), surpassing September's maximum of 29°C (84°F). However, October is characterized by significantly higher precipitation, with 126 mm (4.9 in) spread over 19 days, compared to September's 74 mm (2.9 in) over 21 days. The humidity also rises slightly in October to 78%, compared to 74% in September, contributing to a more humid atmosphere. For more details on October weather in Mombasa, you can visit Mombasa weather in October.
In comparing the weather of September and November, we see a noticeable increase in temperatures and humidity. September typically features a minimum temperature of 22°C (72°F) and an average of 25°C (78°F), peaking at 29°C (84°F), with a total rainfall of 74 mm (2.9 in) spread over 21 days and a humidity level of 74%. In contrast, November experiences warmer conditions, with a minimum temperature of 24°C (75°F) and an average of 27°C (81°F), reaching a maximum of 32°C (89°F). Additionally, November brings slightly more precipitation at 86 mm (3.4 in) over 19 days, along with a higher humidity level of 85%. For more details, you can refer to Mombasa weather in November.
In September, Mombasa experiences a warm climate with temperatures ranging from a minimum of 22°C (72°F) to a maximum of 29°C (84°F), averaging around 25°C (78°F). The month is marked by significant precipitation, with 74 mm (2.9 in) spread over 21 days, contributing to a humidity level of 74%.
In contrast, December sees slightly higher temperatures, with a minimum of 24°C (76°F) and a maximum reaching 32°C (90°F), resulting in an average of 28°C (82°F). The precipitation decreases to 65 mm (2.5 in) over 17 days, while humidity rises to 83%, creating a more humid atmosphere. For a closer look at the weather specifics, you can check Mombasa weather in December.
As September unfolds in Mombasa, it brings a unique blend of warmth and moisture, distinguishing it from the typically drier months. With temperatures averaging a comfortable 25°C (78°F), this month sees remarkable humidity levels at 74%, creating a tropical atmosphere that many visitors find invigorating. September is also notable for its frequent rain, with 21 days experiencing precipitation, accumulating to 74 mm (2.9 in). This contrasts sharply with the drier spells of neighboring months, adding a lush vibrancy to the coastal landscape. For a more in-depth understanding of what to expect, be sure to check out Mombasa Climate.