Last updated: August 21, 2025
September in Addis Ababa, Ethiopia, showcases a unique weather profile characterized by mild temperatures and significant rainfall. The maximum temperature reaches a comfortable 23°C (74°F), while the average settles at a refreshing 15°C (60°F). Nights can get cool, with minimum temperatures dropping to 9°C (48°F). This month witnesses substantial precipitation, totaling 305 mm (12.0 in) over approximately 27 days, contributing to a high humidity level of 81%. As the city transitions into the rainy season, the lush surroundings and cool, damp air create a vibrant atmosphere, perfect for experiencing the lush landscapes and cultural richness of Ethiopia’s capital.
In September, Addis Ababa experiences a gentle transition as the rainy season begins to wind down. The temperatures reflect this shift, with a minimum of 9°C (48°F) and a comfortable average of 15°C (60°F), reaching a pleasant maximum of 23°C (74°F). This month marks a slight rise from the cooler averages of July and August, which hovered around 15°C (59°F), while maximum temperatures now begin to climb towards the more inviting mid-20s. With the city's elevation and unique climate, September offers a refreshing atmosphere perfect for exploring the vibrant culture and stunning landscapes of Ethiopia’s capital.
September marks a significant transition in precipitation for Addis Ababa, showcasing a notable rainfall of 305 mm (12.0 in) spread over 27 days. This month, characterized by the tail end of the heavy rainy season, sees a decrease from the peak rainfall of August, which recorded an impressive 407 mm (16.0 in). Despite this decline, September remains considerably wetter than the earlier months, where rainfall was scarce, with January's mere 3 mm barely making an impact. The distribution of rain days reveals a dynamic weather pattern, as the city basks in the vitality brought by nearly a month of consistent precipitation, preparing for the drier months ahead in October and November. Overall, September serves as a pivotal bridge, linking the intense wet season to the gradual transition towards the drier part of the year.
As September rolls into Addis Ababa, the city experiences a notable shift in humidity, with levels reaching 81%—a slight decrease from the sweltering highs of 88% witnessed in August. This gradual decline marks the end of the peak rainy season and reflects a general trend toward more moderate humidity as the months transition into October. Compared to earlier months, September’s humidity remains significantly higher than the drier periods from January to April, when levels hovered around the 30s to 50s. As the year progresses, residents can expect a comfortable yet humid environment, setting the stage for the upcoming months where humidity will continue to recede, providing a reprieve from the oppressive dampness of mid-year.
As summer transitions into autumn, September's UV Index in Addis Ababa remains notably high at 14, categorized as extreme, with a burn time of just 10 minutes. This trend of elevated UV levels is consistent throughout the year, with the index peaking in the earlier months—recording a stunning 16 in both March and August. Despite a slight dip in the early autumn, September's UV readings illustrate the persistent need for caution against sun exposure in this vibrant city. As the sunlight remains fierce, it’s crucial for residents and visitors alike to stay informed and protect themselves. For more details on monthly UV levels, visit Addis Ababa UV Index.
UV Risk Categories
September in Addis Ababa enjoys a generous 321 hours of sunshine, maintaining the city’s reputation for ample sunlight as it transitions from the lively August days. While the sunlight slightly dips from the previous month, this pattern is consistent with the city's weather trends, where sunshine hours linger around the 320s throughout the late dry season. Following a peak in March—with a remarkable 349 hours—there’s a gradual decrease as the year progresses, yet September remains radiant, promising bright days ahead. As the year shifts toward October, Addis Ababa continues to experience a rich tapestry of sunlight, making it a captivating destination for sun-seekers and adventurers alike.
In September, Addis Ababa experiences a notable drop in sunshine, with a mere 30% chance of sunny days, making it one of the cloudier months of the year. Following the drier months of February and March, where the chances of sunshine peak at 56% and 68% respectively, there is a significant decline as the city transitions from the dry season into the wetter part of the year. This pattern continues into the rainy months of June and July, where the likelihood of sun plummets to as low as 16%. Due to this trend, visitors and locals alike might want to prepare for less predictable weather, often accompanied by the refreshing embrace of rain, throughout September. As the month progresses, the sun does start to peek through again, with possibilities improving as October approaches with a 55% chance of brightening up the landscape.
In September, Addis Ababa continues to bask in a generous 12 hours of daylight, a trend that's consistent throughout the rainy season from March to August. This equable daylight duration offers a harmonious balance, promoting an active lifestyle and enhancing the rich cultural experiences the city has to offer. As the month transitions into October, daylight begins a gradual decline, mirroring the city's shift from the lush greenery of the wet season to the drier months ahead. The stability of light during September not only underlines the city’s unique positioning on the equator but also exemplifies Ethiopia's vibrant rhythm of life, anchored in nature's cycles.
As September graces Addis Ababa with its presence, the city's wind speed tends to mellow, averaging 1.3 m/s (3 mph), making it one of the calmest months of the year. This gentle breeze contrasts sharply with the more dynamic winds of earlier months, peaking in March at 2.9 m/s (6 mph) before gradually tapering off. Following a pattern of decreasing wind speeds from August's 1.4 m/s (3 mph) to September, the city welcomes the onset of its dry season, characterized by tranquility in the air. As October approaches, however, the winds pick up slightly, suggesting a renewed vibrancy just around the corner. This ebb and flow of wind reflects the city's transition through the seasons, offering a serene backdrop for everyday life in Ethiopia's bustling capital.
Weather in Addis Ababa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Addis Ababa, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in September and January, notable contrasts emerge. September experiences cooler temperatures with a minimum of 9°C (48°F) and an average of 15°C (60°F), peaking at 23°C (74°F). This month also sees substantial rainfall, accumulating 305 mm (12.0 in) over 27 days, and boasts high humidity levels at 81%. In contrast, January offers a much drier climate with negligible precipitation of just 3 mm (0.1 in) and no rainy days. The temperatures in January vary from a chilly 0°C (32°F) at night to a warm maximum of 27°C (81°F), with a lower humidity of 50%. For more detailed weather insights, you can check Addis Ababa weather in January.
September and February present quite a contrast in weather conditions. In September, temperatures range from a cooler 9°C (48°F) at night to a pleasant maximum of 23°C (74°F) during the day, but the month is also characterized by heavy rainfall, with 305 mm (12.0 in) of precipitation spread over 27 days and high humidity at 81%. In stark contrast, February showcases milder temperatures, with a minimum of 5°C (41°F) and a maximum reaching 27°C (81°F). Moreover, February is notably drier, featuring just 22 mm (0.9 in) of rainfall over a mere 4 days, accompanied by significantly lower humidity at 41%. For more detailed insights, visit Addis Ababa weather in February.
When comparing the weather in September and March, notable differences emerge. September typically experiences cooler temperatures, with a minimum of 9°C (48°F) and a maximum of 23°C (74°F), while March boasts a higher average temperature of 18°C (64°F) and peaks at 29°C (84°F). Precipitation is another key contrast; September is significantly wetter, receiving 305 mm (12.0 in) over 27 days, while March sees much lighter rainfall of only 37 mm (1.4 in) across just 8 days. Additionally, March has a much lower humidity level of 34% compared to September's high humidity of 81%. For more detailed information on the weather during March, you can check Addis Ababa weather in March.
September and April in Addis Ababa present contrasting weather patterns. September typically features cooler temperatures, with an average of 15°C (60°F) and a maximum of 23°C (74°F), alongside significant precipitation of 305 mm (12.0 in) spread over 27 days, leading to high humidity at 81%. In contrast, April boasts warmer weather, with an average temperature of 18°C (65°F) and highs reaching 29°C (85°F). Additionally, April experiences considerably less rainfall at 161 mm (6.3 in) over just 15 days and lower humidity at 43%. For more detailed information, you can check Addis Ababa weather in April.
In September, temperatures in Addis Ababa range from a cool minimum of 9°C (48°F) to a comfortable maximum of 23°C (74°F), with an average temperature of 15°C (60°F). The month also experiences significant rainfall, with a total precipitation of 305 mm (12.0 in) over 27 days, resulting in high humidity levels around 81%. In contrast, May features milder weather, with temperatures ranging from 8°C (47°F) to a warmer high of 28°C (84°F) and an average of 18°C (64°F). Precipitation in May is considerably lower at 221 mm (8.7 in) over just 16 days, leading to lower humidity levels of 66%. For more detailed insights, you can visit Addis Ababa weather in May.
September and June exhibit distinct weather patterns in terms of temperature and precipitation. September experiences cooler average temperatures, ranging from a minimum of 9°C (48°F) to a maximum of 23°C (74°F), while June offers warmer conditions with temperatures spanning from 9°C (49°F) to 28°C (83°F). Both months see significant rainfall, but September has slightly less precipitation at 305 mm (12.0 in) over 27 days compared to June's 329 mm (13.0 in) over 24 days. Furthermore, September tends to feel more humid, with a humidity level of 81%, whereas June maintains a lower humidity of 60%. For more detailed insights, check out Addis Ababa weather in June.
In comparing the weather patterns of September and July, we observe that both months have similar average temperatures, hovering around 15°C (59°F). However, September experiences a slightly lower maximum temperature of 23°C (74°F) compared to July's 22°C (73°F). Precipitation is notably higher in July, with 386 mm (15.2 in) over 31 days, while September sees 305 mm (12.0 in) across 27 days, indicating a wetter month overall in July despite having just two more days of rain. Humidity levels are comparable, with September at 81% and July slightly higher at 83%. For a more detailed look at July's weather, you can visit Addis Ababa weather in July.
In comparing the weather of September and August, September shows a slight decrease in average temperature, with a minimum of 9°C (48°F) and a maximum of 23°C (74°F), compared to August, which ranges from a minimum of 10°C (50°F) to a maximum of 22°C (72°F). While the average temperature remains relatively stable, September experiences a notable decrease in precipitation, with 305 mm (12.0 in) over 27 days, compared to August's 407 mm (16.0 in) over 31 days. Humidity levels are also somewhat lower in September at 81%, compared to August's 88%. For further details, you can check Addis Ababa weather in August.
In September, the weather showcases a mild range of temperatures, with a minimum of 9°C (48°F) and a maximum of 23°C (74°F), averaging around 15°C (60°F). However, it also experiences significant precipitation, totaling 305 mm (12.0 in) over 27 days, combined with high humidity at 81%. In contrast, October brings slightly cooler temperatures, starting at a minimum of 5°C (41°F) and reaching up to 25°C (77°F), while maintaining the same average of 15°C (60°F). Notably, the rainfall decreases considerably to 65 mm (2.5 in) over just 7 days, and humidity gently drops to 78%. For more detailed insights, you can check the link: Addis Ababa weather in October.
September and November exhibit notable differences in weather patterns. In September, temperatures range from a minimum of 9°C (48°F) to a maximum of 23°C (74°F), with an average of 15°C (60°F). This month also experiences substantial precipitation, totaling 305 mm (12.0 in) over 27 days, leading to a high humidity level of 81%. In contrast, November sees lower minimum temperatures at 3°C (38°F), while the maximum temperature rises slightly to 25°C (77°F), maintaining the same average of 15°C (60°F). Notably, November is much drier, with only 15 mm (0.6 in) of rain over just 3 days, resulting in a slightly lower humidity of 79%. For more details, you can check Addis Ababa weather in November.
In September, the weather tends to be quite damp and variable, with temperatures ranging from a mild 9°C (48°F) at night to a comfortable maximum of 23°C (74°F) during the day. This month experiences significant rainfall, averaging 305 mm over 27 days, contributing to a high humidity level of 81%.
Conversely, December offers a notable shift in climate, with temperatures maintaining a similar average of 15°C (59°F), yet ranging from a cooler minimum of 3°C (37°F) to a warmer maximum of 26°C (78°F). The contrast is stark in terms of precipitation, as December remains dry with only 3 mm of rain and no rainy days at all, leading to a lower humidity of 67%. For more specifics on the weather in December, you can check Addis Ababa weather in December.
In September, Addis Ababa experiences a noticeable shift in its weather, characterized by a higher humidity level and a significant amount of rainfall compared to other months. While temperatures remain mild, with highs averaging around 23°C, the relentless drizzle on about 27 days brings a lushness to the landscape, setting this month apart from the drier seasons. With an average temperature hovering around 15°C, September is often perceived as one of the wetter months, making it essential for visitors and locals alike to prepare for the frequent showers. For those interested in understanding the broader climate patterns of this vibrant city, more details can be found here: Addis Ababa Climate.