Last updated: August 21, 2025
September in Kisumu, Kenya offers a warm and humid climate, with temperatures peaking at a comfortable 29°C (85°F) and averaging 22°C (71°F) during the day. The weather can be described as a blend of mild warmth and lushness, as the region experiences significant precipitation, amounting to 141 mm (5.5 in) over 22 days. With an average humidity level of 73%, the air carries a refreshing yet humid quality, perfect for exploring the beauty of this vibrant city. Prepare for the possibility of rain while enjoying the lush landscapes that thrive in this tropical environment.
In September, Kisumu, Kenya experiences a subtle transition in temperatures, with minimums around 17°C (62°F) and average highs reaching approximately 29°C (85°F). As the last month of the dry season, this period showcases a slight increase in warmth, especially in comparison to the cooler months of July and August, which lingered with maximums of 27°C (81°F). The consistent average temperature of 22°C (71°F) indicates a stable climate throughout the month, encouraging outdoor activities and vibrant local life. As the region prepares for the impending rains, the pleasant warmth of September serves as a gentle reminder of the coming seasonal shift.
In September, Kisumu experiences a notable increase in rainfall, accumulating 141 mm (5.5 in) over 22 days—a significant rise from the drier months of July and August. This uptick marks a transition into the wetter season, with precipitation steadily climbing as the year progresses towards October, which typically sees even higher totals of 234 mm (9.2 in). The frequency of rain during September mirrors the pattern established in earlier months, sustaining a rhythm of moderate to heavy showers that not only rejuvenate the local ecosystems but also underline the region's climatic shift. With each passing month, the shift towards increased rainfall highlights the seasonal ebb and flow intrinsic to Kisumu’s climate, as it balances between dry spells and lush, rainy periods.
September in Kisumu, Kenya, brings a moderate level of humidity at 73%, maintaining the trend of fluctuating moisture levels throughout the year. Following the cooler and slightly drier months of August, which recorded a lower 69%, September sees a slight uptick as it transitions into the more humid months ahead. This slight increase marks a prelude to the high humidity levels typically experienced in October and November, which soar to 80% and 85%, respectively. The pattern reflects Kisumu's tropical climate, where humidity tends to rise significantly towards the end of the year, creating a lush and vibrant environment. Overall, September is a month where air moisture begins to build again, setting the stage for the wetter conditions that follow.
September in Kisumu, Kenya, features a UV Index of 14, maintaining an extreme exposure category that requires vigilance against sunburn, with a burn time of just 10 minutes. Following a series of consistently high UV readings throughout the year—peaking at 16 in March—September’s index reflects a slight dip, yet it remains a month where sun safety is paramount. As the seasons transition, the UV levels indicate that Kisumu continues to experience intense sunlight, encouraging locals and visitors alike to stay informed and protected. For more information on UV patterns, check out the detailed insights at Kisumu UV Index.
UV Risk Categories
September in Kisumu, Kenya, continues a remarkable trend of abundant sunshine that characterizes the region throughout the year. With 327 hours of sunshine, this month showcases a slight dip from August's impressive tally of 335 hours, yet it remains robust compared to the earlier months. The sunshine hours in September reflect a consistent pattern, as the year progresses from a post-rainy season high in March to the steady warmth of early spring. As the days grow slightly shorter, Kisumu still basks in a generous amount of sunlight, making it an inviting destination for outdoor activities and exploration. The warmth and brightness of September encapsulate the vibrant essence of the region, setting the stage for the radiant days ahead.
In Kisumu, Kenya, the likelihood of enjoying sunny weather in September stands at 36%, a figure that mirrors the previous month, August. This places September in a middle tier of sunlight opportunity compared to other months throughout the year. Notably, this period of the year is sandwiched between June's brighter skies at 46% and April's cloudier days at just 23%. While September’s chances are less favorable than the sun-drenched months of June and January, it offers a decent chance to bask in the sun, making it a pleasant choice for travelers and locals alike seeking a balance between sunshine and the lingering moisture characteristic of East Africa's transitional climate.
In Kisumu, Kenya, the daylight duration remains remarkably consistent throughout the year, with a steady 12 hours of daylight in September, just like every other month. This uniformity underscores the region's equatorial location, where the sun rises and sets at similar times year-round. As September unfolds, residents and visitors alike can enjoy the beauty of the long days, ideal for various outdoor activities and community gatherings. This reliable rhythm of daylight not only supports a vibrant lifestyle but also enhances the natural charm of Kisumu, making it a delightful place to experience the gentle progression of seasons.
As September sweeps in Kisumu, Kenya, the average wind speed gently hovers around 1.7 m/s (4 mph), maintaining a consistent breeze reminiscent of the preceding months. This slight uptick from the lower winds of May, at 1.4 m/s, highlights a subtle resurgence in airflow as the year transitions towards its final quarter. Overall, Kisumu's wind patterns reveal a stable environment, with most months averaging around 1.6 to 1.9 m/s. The gentle pushes of September winds create a refreshing atmosphere, embracing the local landscape while inviting residents to engage in outdoor activities, making it a perfect time to enjoy the serene beauty of the lakeside city.
Weather in Kisumu varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Kisumu, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather is characterized by milder temperatures with a minimum of 17°C (62°F) and an average of 22°C (71°F), peaking at a maximum of 29°C (85°F). However, the month also experiences significant rainfall, with 141 mm (5.5 in) of precipitation spread over 22 days and a higher humidity level of 73%. In contrast, January typically sees slightly warmer conditions, with temperatures ranging from a minimum of 17°C (62°F) to a maximum of 31°C (88°F), while maintaining a similar average of 22°C (72°F). Precipitation decreases notably, totaling 89 mm (3.5 in) over just 11 days, and the humidity remains comparable at 72%. For a deeper look into January weather specifics, visit Kisumu weather in January.
September and February present distinct weather patterns, despite their similar average temperatures. In September, the temperatures range from a minimum of 17°C (62°F) to a maximum of 29°C (85°F), accompanied by higher precipitation levels at 141 mm (5.5 in) spread over 22 days. The humidity remains relatively high at 73%. In contrast, February boasts slightly warmer conditions, with temperatures varying from a minimum of 16°C (62°F) to a maximum of 32°C (89°F) and lower precipitation at 104 mm (4.1 in) over just 15 days. Humidity levels in February are slightly lower at 72%. For a detailed look at February's climate, visit Kisumu weather in February.
In comparing the weather of September and March, both months feature a minimum temperature of around 17°C (62°F to 63°F) and an average temperature of 22°C (71°F to 73°F). However, March tends to be warmer overall, with a maximum temperature reaching 33°C (91°F), compared to September's peak of 29°C (85°F). Precipitation is notably higher in March, with 218 mm (8.6 in) falling over 22 days, while September has 141 mm (5.5 in) of rainfall during the same number of days. Additionally, March has a slightly lower humidity level at 69% compared to September's 73%. For more detailed weather information, check out Kisumu weather in March.
Comparing the weather in September and April reveals some interesting contrasts. Both months boast a similar average temperature of around 22°C (72°F), but April typically experiences higher maximum temperatures, reaching up to 32°C (89°F), compared to September's maximum of 29°C (85°F). Precipitation also differs significantly, with April receiving 285 mm (11.2 in) over 26 days, making it notably wetter than September's 141 mm (5.5 in) across 22 days. Humidity remains consistent in both months at 73%, contributing to a similar muggy feel. For more details, you can check out Kisumu weather in April.
When comparing the weather in September and May, both months exhibit warm temperatures, with September featuring a minimum of 17°C (62°F), an average of 22°C (71°F), and a maximum of 29°C (85°F). May, while slightly cooler on average at 21°C (71°F), has a similar minimum temperature but slightly lower maximum temperatures at 28°C (82°F). However, May is significantly wetter, receiving 252 mm (9.9 in) of precipitation over 28 days, compared to September's 141 mm (5.5 in) over 22 days. Additionally, May experiences a higher humidity level at 81%, which is more than the 73% humidity seen in September. For more detailed insights into May's climate, you can check out Kisumu weather in May.
In comparing the weather of September and June, both months exhibit similar temperature ranges, with September having a slightly warmer feel, with averages reaching up to 22°C (71°F) compared to June's 21°C (71°F). Notably, September experiences a higher maximum temperature of 29°C (85°F) compared to June's 28°C (82°F). Precipitation is more pronounced in September, with 141 mm (5.5 in) spread across 22 days, compared to June's 110 mm (4.3 in) over 21 days. Humidity levels are also comparable, with September at 73% and June slightly higher at 75%. For a more detailed look at June weather, you can visit Kisumu weather in June.
In comparing the weather between July and September, September tends to be slightly warmer, with average temperatures reaching 22°C (71°F) compared to July's 21°C (70°F). Both months experience similar minimum temperatures, but September enjoys higher maximum temperatures of up to 29°C (85°F) while July peaks at 27°C (81°F). Additionally, September sees more precipitation, with 141 mm (5.5 in) spread over 22 days, making it wetter than July, which records 103 mm (4.1 in) over 18 days. Humidity levels are also slightly higher in September at 73%, compared to 71% in July. For more detailed weather insights on July, check Kisumu weather in July.
September generally experiences warmer temperatures compared to August, with average highs reaching 29°C (85°F), compared to August's maximum of 27°C (82°F). While both months have a similar average temperature of around 22°C (71°F), September sees a slight increase in nighttime lows, averaging 17°C (62°F) versus August's 16°C (61°F). In terms of precipitation, September is wetter, with 141 mm (5.5 in) recorded over 22 days, compared to 114 mm (4.5 in) over 20 days in August. The humidity also rises slightly in September to 73%, compared to 69% in August. For more details on the weather in August, you can visit Kisumu weather in August.
In comparing the weather between September and October, we see some notable similarities and differences. Both months maintain a minimum temperature of around 17°C (62°F) and an average of 22°C (71°F), while the maximum temperatures are quite close, reaching 29°C (85°F) in September and slightly lower at 29°C (84°F) in October. However, October experiences significantly more precipitation, with 234 mm (9.2 in) over 26 days compared to September's 141 mm (5.5 in) over 22 days. This increase in rainfall contributes to a higher humidity level in October, averaging 80% compared to September's 73%. For a more detailed look at the climate in October, check out Kisumu weather in October.
Comparing the weather in September and November reveals some notable differences. Both months share similar temperature ranges, with minimums around 17°C (62°F), averages of 22°C (71°F), and maximums peaking at 29°C (85°F in September) and 29°C (84°F in November). However, November experiences significantly more precipitation, receiving 230 mm (9.1 in) over 24 days, compared to September's 141 mm (5.5 in) over 22 days. Additionally, November is characterized by higher humidity, reaching 85% compared to September's 73%. These factors contribute to a wetter and more humid atmosphere in November, making it a distinctly different month in terms of weather. For detailed insights, you can check Kisumu weather in November.
In comparing September and December weather, both months experience similar average temperatures, with a minimum of 17°C (62°F) and an average of 22°C (71°F). However, December sees a slightly higher maximum temperature of 30°C (86°F), compared to September's maximum of 29°C (85°F). Additionally, December tends to be wetter, recording 171 mm (6.7 in) of precipitation over 21 days, whereas September has 141 mm (5.5 in) over 22 days. The humidity also rises in December, reaching 80%, compared to September's 73%. For more detailed information, you can visit Kisumu weather in December.
September in Kisumu offers a distinctive weather experience, characterized by relatively mild temperatures and frequent rainfall, setting it apart from the drier months. With maximum temperatures reaching a comfortable 29°C (85°F) and an average of 22°C (71°F), the warmth is often accompanied by a high humidity level of 73%, creating a lush and vibrant atmosphere. The month sees significant precipitation, averaging 141 mm (5.5 in) over 22 days, making it one of the wetter times of the year. This blend of warmth and moisture fosters a thriving environment, perfect for exploring the natural beauty of the region. For a deeper understanding of the weather patterns throughout the year, visit Kisumu Climate.