Last updated: August 21, 2025
In Jimma, Ethiopia, September heralds a transition marked by cool temperatures and significant rainfall. The average temperature hovers around 17°C (64°F), while daytime highs can reach a comfortable 26°C (79°F), dipping to a cool 12°C (54°F) at night. This month witnesses abundant precipitation, accumulating to 268 mm (10.5 in) over the course of 29 days, leading to a lush and vibrant landscape. With a humidity level soaring to 88%, the air feels refreshingly dense, creating a unique atmosphere that characterizes September in this captivating region.
In September, Jimma, Ethiopia experiences a gentle transition in temperatures, with minimums around 12°C (54°F) and maximums peaking at 26°C (79°F). The average temperature hovers around 17°C (64°F), reflecting a slight upward trend from the cooler, rainy months of July and August. This month strikes a balance between the lingering coolness of winter and the warmer weeks approaching October, inviting comfortable days ideal for exploring the lush landscapes. As Jimma continues to shake off the cooler rains, September offers a refreshing climate that perfectly encapsulates the beauty of the Ethiopian highlands, making it an appealing time for visitors and locals alike.
In September, Jimma, Ethiopia, experiences a remarkable surge in precipitation, with an impressive total of 268 mm (10.5 in) of rain recorded over 29 days. This month marks the pinnacle of the wet season, building on the substantial rainfall of previous months, particularly August, which also delivered a hefty 255 mm (10.0 in). As the year progresses, one can observe a clear trend of increasing rainfall from the earlier months, where January starts with a mere 6 mm. September's torrential downpours not only underscore the region's climatic patterns but also energize the lush landscapes that characterize the area. This consistent rainfall, peaking just before the dryer October, signifies the crucial role September plays in sustaining the local ecology and agriculture.
In Jimma, Ethiopia, September marks a notable peak in humidity, rising to 88%, which is a slight increase from August's already high 87%. As the year progresses, there's a clear trend of escalating humidity levels, particularly noticeable from May onwards, when it surges to 84% and continues to climb through the latter half of the year. The escalation indicates a significant transition into a wetter climate, culminating in October and November, where humidity remains consistently high at 89%. This increase creates a lush, green landscape characteristic of the region during these months, while also highlighting a stark contrast to the drier winter months at the start of the year.
In September, Jimma experiences a UV Index of 14, maintaining its position in the extreme exposure category with a remarkably consistent burn time of just 10 minutes. This is emblematic of a broader trend observed throughout the year, where the UV Index frequently hovers around 13 to 15 from January to August, illustrating an unwavering intensity of sunlight. Following September, the Index slightly dips in October to 12, yet the overall pattern reveals that vigilance against sun exposure remains essential throughout the year. Whether you're enjoying the vibrant landscapes or engaging in outdoor activities, it's crucial to take protective measures during these sun-soaked months. For more detailed information, explore the Jimma UV Index.
UV Risk Categories
September in Jimma, Ethiopia, offers a delightful 306 hours of sunshine, contributing to a sustained trend of abundant daylight that characterizes the region. Following the peak of summer in March with 340 hours, the hours gradually taper off, yet September maintains a comfortable brightness, perfectly bridging the end of the rainy season. The slight dip from August’s 317 hours to September’s tally indicates a subtle shift as the days begin to shorten, but the overall sunshine remains robust, ensuring continued warmth and vibrancy. As autumn approaches, Jimma enjoys a pleasant mix of sunshine that is sure to energize both residents and visitors alike, hinting at a promising transition into October's 323 hours of golden rays.
In Jimma, Ethiopia, September brings a notable decline in sunny weather, with only a 15% chance of sunshine, making it one of the cloudier months of the year. This trend reflects a gradual decrease in sunlight, beginning in the dry season from January to March, where the chances of clear skies hover around 60%. As the year progresses into the rainy season, particularly from May through August, the likelihood of sunny days plunges to the lowest points of 25% and below. Interestingly, a rebound occurs as October approaches, with sunny prospects climbing to 41%, but September remains a time when overcast skies are far more likely to dominate the horizon.
In September, Jimma, Ethiopia, enjoys a consistent 12 hours of daylight, a pattern it shares with the summer months of June through August. This period of extended daylight not only enhances the vibrant greenery that characterizes the region but also fosters a sense of communal activity as days stretch longer. As the calendar turns to October, daylight begins to taper off, transitioning back to 11 hours, signaling the onset of the dry season. Overall, Jimma experiences minimal variation in daylight throughout much of the year, with only slight fluctuations that create a stable rhythm for both nature and daily life.
As September arrives in Jimma, Ethiopia, the wind takes on a gentle demeanor, with an average speed of just 0.9 m/s (2 mph), mirroring the tranquility of the preceding months. This slight dip in wind speed is part of a broader trend observed throughout the year, where winter months typically see higher averages compared to the calmer summer season. From January to April, wind speeds pulse steadily above 1 m/s, but as the year progresses into the warmest months, we witness a gradual decline, culminating in the soft breezes of late summer. The September winds, while mild, set the stage for a subtle shift as the region transitions into the slightly brisker months of October and November, hinting at the revitalizing gusts that characterize the Ethiopian highlands.
Weather in Jimma varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Jimma, focusing on differences in temperature, rainfall, humidity, and UV levels.
September and January present contrasting weather conditions. In September, temperatures range from a minimum of 12°C (54°F) to a maximum of 26°C (79°F), with an average temperature of 17°C (64°F). This month is characterized by high humidity of 88% and substantial precipitation, averaging 268 mm (10.5 in) over 29 days. In stark contrast, January experiences a wider temperature range, with a minimum of 7°C (45°F) and a maximum of 29°C (85°F), yielding an average of 19°C (66°F). This month is much drier, receiving only 6 mm (0.2 in) of rainfall over just one day, and the humidity drops to 60%. For more insights on the January weather, you can visit Jimma weather in January.
When comparing the weather in September and February, there are notable differences in temperature and precipitation. September sees a minimum temperature of 12°C (54°F) and can reach up to 26°C (79°F), with an average of 17°C (64°F). However, it is characterized by heavy rainfall, accumulating around 268 mm (10.5 in) over 29 days, resulting in high humidity levels of 88%. In contrast, February offers a milder climate with a minimum of 10°C (49°F) and a maximum of 30°C (86°F), averaging 19°C (67°F). Precipitation is significantly lower in February, with only 42 mm (1.6 in) over 7 days and a humidity level of 52%. For more detailed information, you can check Jimma weather in February.
In comparing the weather between September and March, we see distinct differences in temperature and precipitation patterns. September experiences cooler temperatures with a minimum of 12°C (54°F) and an average of 17°C (64°F), while March offers a milder climate, with a minimum of 11°C (51°F) but a higher average of 20°C (68°F) and a maximum reaching 30°C (87°F). Additionally, September is characterized by substantial rainfall, accumulating 268 mm (10.5 in) over 29 days, making it quite wet and humid at 88%. In contrast, March has significantly less precipitation, totaling only 58 mm (2.3 in) across 9 days and lower humidity levels at 45%. For more detailed information, check Jimma weather in March.
In comparing September and April weather, we see notable differences in temperature, precipitation, and humidity. September experiences a cooler range with average temperatures around 17°C (64°F), while April enjoys warmer averages of 20°C (68°F) and can reach highs of up to 30°C (86°F). In terms of precipitation, September is much wetter, receiving 268 mm (10.5 in) over 29 days, compared to April's 136 mm (5.3 in) across just 17 days. Additionally, humidity levels are higher in September at 88%, while April maintains a more comfortable 58%. For more detailed insights, you can check Jimma weather in April.
In comparing the weather of September and May, both months share a similar minimum temperature of around 12°C (54°F), but May typically sees a warmer average temperature of 19°C (66°F) compared to September's average of 17°C (64°F). While September experiences slightly higher precipitation at 268 mm (10.5 in) over 29 days, May is not far behind with 251 mm (9.9 in) over 26 days. Additionally, humidity levels in September are slightly higher at 88%, compared to May's 84%. For more detailed insights into the weather in May, you can check Jimma weather in May.
In comparing the weather of September and June, both months exhibit relatively mild temperatures with average highs around 17°C (64°F), but September tends to see slightly warmer maximum temperatures reaching up to 26°C (79°F) compared to June's peak of 28°C (82°F). Interestingly, the precipitation levels are higher in September, with 268 mm (10.5 in) of rain over 29 days, compared to 217 mm (8.5 in) over 28 days in June, leading to a more humid atmosphere in September at 88% versus June's 84%. For those looking for more specific insights about June's weather, you can find additional details here: Jimma weather in June.
In comparing the weather between September and July, September tends to be slightly warmer, with average temperatures peaking at 17°C (64°F) and reaching a maximum of 26°C (79°F), while July's average temperature remains at 17°C (62°F) with a maximum of 25°C (77°F). Although both months are characterized by high humidity—88% in September and 84% in July—September experiences significantly more rainfall, totaling 268 mm (10.5 in) over 29 days compared to July's 200 mm (7.9 in) over 30 days. These factors contribute to a more humid and wetter climate in September than in July. For more detailed information on July weather, you can visit Jimma weather in July.
September weather shows a slight increase in maximum temperatures compared to August, peaking at 26°C (79°F) versus August's 25°C (77°F). Both months share the same minimum temperature of 12°C (54°F) and average temperature of 17°C (64°F), indicating a consistent coolness in the mornings and evenings. However, September experiences slightly more precipitation at 268 mm (10.5 in) over 29 days, compared to August's 255 mm (10.0 in) across 30 days. Humidity levels remain comparable, with September at 88% and August at 87%. For more details on August weather, visit Jimma weather in August.
September and October present a subtle transition in weather patterns. In September, temperatures range from a minimum of 12°C (54°F) to a maximum of 26°C (79°F), with an average of 17°C (64°F). The month is notably wet, experiencing high precipitation of 268 mm (10.5 in) over 29 days, coupled with a humidity level of 88%.
In contrast, October shows a slightly cooler minimum temperature of 10°C (50°F) but maintains an average of 18°C (64°F) and a maximum of 27°C (80°F). Precipitation decreases significantly to 185 mm (7.3 in) across 19 days, while humidity remains similar at 89%. This shift highlights a drier October, making it more pleasant despite a modest increase in average maximum temperature. For more detailed insights into October weather, you can visit Jimma weather in October.
In September, temperatures range from a low of 12°C (54°F) to a high of 26°C (79°F), with an average of 17°C (64°F). The month is characterized by significant rainfall, receiving 268 mm (10.5 in) over 29 days, and a high humidity level of 88%. In contrast, November offers slightly cooler temperatures, with a minimum of 9°C (48°F) and a maximum of 27°C (82°F), averaging around 18°C (65°F). Precipitation is substantially lower in November, totaling 70 mm (2.8 in) over just 9 days, while humidity remains comparable at 89%. For a more detailed look at the weather in this month, visit Jimma weather in November.
In September, the weather is characterized by a wide range of temperatures, with minimums around 12°C (54°F) and maximums reaching up to 26°C (79°F). The month is notably wet, experiencing heavy precipitation of 268 mm (10.5 in) over approximately 29 days, which results in high humidity levels at 88%. In contrast, December brings milder conditions, with temperatures ranging from a minimum of 7°C (45°F) to a maximum of 28°C (82°F). However, it is much drier, with only 10 mm (0.4 in) of precipitation recorded over just 2 days, and humidity slightly lower at 80%. For a more detailed look at the climate in December, you can check out Jimma weather in December.
As September rolls in, Jimma experiences a distinct transition marked by higher precipitation and consistent temperatures. With the sky frequently draped in clouds, the average humidity rises to a notable 88%, making this month particularly moist and fresh. Unlike the drier months preceding it, which bask in more sunshine, September pours down nearly 268 mm of rain over 29 days, significantly altering the landscape and atmosphere. If you're looking to explore this captivating change in weather, learn more about the overall patterns in the region at Jimma Climate.