Last updated: August 27, 2025
September in Onitsha, Nigeria is characterized by warm temperatures and high humidity, making it a time of notable weather patterns. The maximum temperature can soar to a sweltering 34°C (93°F), while the average temperature rests comfortably at 26°C (79°F), with cooler minimums around 23°C (73°F). This month experiences substantial precipitation, accumulating 249 mm (9.8 in) over 26 days, resulting in a humidity level of 91% that permeates the air. The consistent rainfall and warmth create a lush, vibrant atmosphere, typical of the region's tropical climate, inviting both challenges and beauty in daily life.
In September, Onitsha experiences a blend of warmth and comfort, with minimum temperatures around 23°C (73°F) and an average soaring to 26°C (79°F). This month typically sees a slight uptick in temperature, peaking at 34°C (93°F), which aligns closely with the warmer trends of the preceding months. While the humidity remains palpable, September maintains a cozy vibe, reminiscent of the wetter months ahead. As the city transitions from the cooler days of August, residents enjoy some of the most pleasant weather before the rains intensify in October, marking a gentle shift toward the end of the dry season.
September marks a significant peak in precipitation in Onitsha, Nigeria, with an impressive 249 mm (9.8 in) of rainfall, making it the month with the highest rainfall in the year. This surge in precipitation aligns with the onset of the northern rainy season, characterized by an increase in rainfall days, as Onitsha experiences 26 days of rain in September. Following a pattern established in preceding months, where June, July, and August also recorded substantial rainfall, September concludes a wet season that showcases the region's lush landscapes. As the skies often open up during this month, the transition to slightly drier October engages residents in preparations for the coming shift, while the lush greenery from the rains continues to thrive.
In Onitsha, Nigeria, September marks the peak of humidity, reaching a notable 91%. This high level of moisture in the air continues the trend of increasingly humid months, which begins in March with a moderate 60% and escalates through the year, particularly in the rainy season from June to August. After August's 90%, September solidifies the city's reputation for a sultry atmosphere just before the humidity begins its gradual decline. As the year progresses towards October, humidity slightly decreases to 90%, followed by a more significant drop in the coming months, indicating a shift towards drier conditions as the year transitions into the cooler season. This cyclical change not only highlights the distinct wet and dry seasons in Onitsha but also enhances the vibrant and lush environment characteristic of the region during these humid months.
In September, Onitsha, Nigeria, experiences an UV Index of 12, placing it firmly in the extreme exposure category. This means that within just 10 minutes, individuals can begin to face the risk of sunburn, a trend that has remained consistent throughout the peak months of the year. Following a series of high UV readings from January through August, where indices reached as high as 13 in April, September maintains this intensity before transitioning into slightly lower values in November and December. As the sun continues to shine brightly, it's crucial to take precautions and protect your skin. For more details on UV trends, visit Onitsha UV Index.
UV Risk Categories
September in Onitsha, Nigeria, brings with it 252 hours of sunshine, marking a slight dip from the vibrant summer months. This reduction signifies the transition into the rainy season, reflecting a broader trend of fluctuating sunlight hours throughout the year. Interestingly, despite this decline, September remains a part of a generally sunny climate that peaks in May with an impressive 297 hours. Following the pattern of diminishing hours, October begins on a cautious note with 264 hours, hinting at a gradual return to sunnier days. Overall, while September's sunshine may be less abundant, it embodies the natural ebb and flow of the region's climatic rhythm, setting the stage for the promising warmth of the months to follow.
In September, Onitsha, Nigeria, experiences a notably low likelihood of sunny weather, with only an 11% chance of sunshine. This figure is consistent with the trend observed during the preceding months, where precipitation often dominates the landscape. As the rainy season peaks, September marks one of the cloudiest months of the year, following August's meager 9% chance of sun. While the dry season begins to reemerge in October, bringing a 19% chance of sunshine, September remains entrenched in a period where conditions are predominantly overcast, making it less favorable for sun-seekers.
In Onitsha, Nigeria, the month of September offers a delightful continuation of the summer’s long daylight, boasting a consistent 12 hours of sunshine each day. This trend follows a prolonged stretch of months—from March through September—where daylight remains relatively stable, providing ample opportunities for outdoor activities and community events. As the year transitions into October, daylight begins to wane, dropping back to 11 hours, signaling a gradual shift towards shorter days. This rhythm of daylight duration not only highlights the region's tropical climate but also enhances the vibrant lifestyle characteristic of Onitsha throughout the peak months of the year.
As September unfolds in Onitsha, the city experiences a gentle breeze with an average wind speed of 1.8 m/s (4 mph), marking a subtle decline from the slightly livelier months of summer. This decrease in wind speed follows a trend seen since the peak in April, where the winds reached 2.5 m/s (6 mph). Throughout the year, the wind speeds show a gradual decline as the months transition from the vibrant gusts of March and April to the more tranquil breezes of late summer and early autumn. The soft whispers of September winds serve as a reminder of the approaching dry season, setting the scene for a more serene and mellow atmosphere as the year advances.
Weather in Onitsha varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Onitsha, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather in Onitsha is characterized by consistently warm temperatures, with averages around 26°C (79°F) and highs reaching up to 34°C (93°F). This month experiences significant rainfall, with 249 mm (9.8 in) of precipitation spread over 26 days and high humidity levels at 91%. In stark contrast, January provides a different climate experience, with a lower minimum temperature of 19°C (66°F) and an average of 29°C (85°F), peaking at a scorching 40°C (104°F). This month is notably dry, receiving only 5 mm (0.2 in) of rain in just one day and experiencing a much lower humidity level at 31%. For more detailed information, you can check Onitsha weather in January.
September and February present notably contrasting weather patterns. In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 34°C (93°F), with an average temperature of 26°C (79°F). The month is characterized by high humidity at 91% and substantial rainfall measuring 249 mm (9.8 in) over 26 days, making it a rather wet month. In stark contrast, February sees higher maximum temperatures reaching up to 40°C (105°F) and a more comfortable average of 30°C (87°F). The humidity drops significantly to 36%, and precipitation is scarce, totaling just 16 mm (0.6 in) over only 3 days. For more information, visit Onitsha weather in February.
September and March present contrasting weather conditions. In September, temperatures range from a minimum of 23°C (73°F) to a maximum of 34°C (93°F), with an average of 26°C (79°F). This month experiences high humidity at 91% and significant rainfall of 249 mm (9.8 in) over 26 days, indicating a wet and humid atmosphere. In contrast, March boasts warmer temperatures, with a minimum of 23°C (75°F) and a maximum reaching 40°C (104°F), along with a higher average temperature of 30°C (86°F). The rainfall drops sharply to 47 mm (1.9 in) over just 10 days, and the humidity decreases to 60%, resulting in a drier and hotter climate. For more details, visit Onitsha weather in March.
When comparing the weather in September and April, we notice distinct differences in temperature and precipitation. September features a moderate temperature range, with a minimum of 23°C (73°F) and an average of 26°C (79°F), culminating in a maximum of 34°C (93°F). In contrast, April experiences warmer conditions, boasting a higher average temperature of 29°C (84°F) and potential highs reaching 40°C (103°F). Precipitation levels also diverge significantly; September sees substantial rainfall of 249 mm (9.8 in) across 26 days, while April records only 86 mm (3.4 in) over 15 days. Additionally, humidity levels are higher in September at 91%, compared to April's 73%. For more specific details about the weather in April, you can refer to Onitsha weather in April.
When comparing the weather in September and May, we can observe some notable differences. September features a slightly lower average temperature of 26°C (79°F) compared to May's warmer 28°C (83°F), with May experiencing higher maximum temperatures that can reach 37°C (98°F). In terms of precipitation, September is significantly wetter, recording 249 mm (9.8 in) over 26 days, while May has only 128 mm (5.0 in) across 20 days. Additionally, September's humidity is higher at 91%, compared to May's 84%. For more detailed information, you can check Onitsha weather in May.
In comparing the weather of September and June, both months exhibit similar temperature ranges, with minimums around 23°C (73°F) and maximums peaking at 34°C (93-94°F). However, September tends to be slightly cooler on average, with an average temperature of 26°C (79°F) compared to June's 27°C (81°F). Precipitation is more frequent in September, with 249 mm (9.8 in) of rainfall over 26 days, while June experiences 193 mm (7.6 in) of rain over just 23 days. Additionally, September's humidity is higher at 91%, compared to June's 86%. For a more detailed look at June weather, you can refer to Onitsha weather in June.
In comparing the weather of September and July, we observe that both months have similar average temperatures, with September ranging from a minimum of 23°C (73°F) to a maximum of 34°C (93°F), while July has a comparable minimum of 22°C (72°F) and a maximum of 33°C (92°F). However, September is characterized by significantly higher precipitation, totaling 249 mm (9.8 in) over 26 days, compared to July's 201 mm (7.9 in) over the same number of days. Additionally, humidity levels in September reach 91%, slightly higher than July's 87%. For a more detailed look at July's weather, you can check Onitsha weather in July.
In comparing the weather between August and September, we notice a slight increase in temperature during September, with minimums reaching 23°C (73°F) and maximums peaking at 34°C (93°F), compared to August's range of 22°C (73°F) to 33°C (91°F). Precipitation levels in September are notably higher, totaling 249 mm (9.8 in) over 26 days, whereas August saw 181 mm (7.1 in) over 23 days. Both months maintain high humidity levels, with September slightly higher at 91% compared to August's 90%. For a more detailed overview of August's weather, visit Onitsha weather in August.
In September, the weather is characterized by a minimum temperature of 23°C (73°F) and an average of 26°C (79°F), peaking at a maximum of 34°C (93°F). The month experiences considerable rainfall with a total of 249 mm (9.8 in) spread over 26 days and high humidity levels reaching 91%. In contrast, October shows a slight uptick in average temperature at 27°C (81°F), while maintaining the same minimum and maximum temperatures as September. Rainfall decreases to 173 mm (6.8 in) over 24 days, and humidity also slightly lowers to 90%. These changes create a subtle transition in the weather as the season progresses. For more details, you can visit Onitsha weather in October.
In September, the weather tends to be quite humid and wet, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 34°C (93°F) and an average of 26°C (79°F). The month sees substantial rainfall, with 249 mm (9.8 in) spread over 26 days, maintaining a high humidity level of 91%.
In contrast, November offers a warmer average of 28°C (82°F) and a higher maximum temperature of 35°C (96°F), while the minimum remains at 23°C (73°F). The rainfall drastically decreases to just 30 mm (1.2 in) over 8 days, resulting in a lower humidity of 82%. For a more detailed look at the weather patterns in November, you can refer to Onitsha weather in November.
In September, the weather is characterized by high humidity and significant rainfall, with temperatures ranging from a minimum of 23°C (73°F) to a maximum of 34°C (93°F). With 249 mm (9.8 in) of precipitation over 26 days, the month is quite wet and humid, making it feel hotter than it is. In contrast, December experiences a drier climate with much lower precipitation of just 5 mm (0.2 in), and not a single rainy day. The temperatures in December vary from a minimum of 18°C (65°F) to a maximum of 38°C (100°F), with an average of 29°C (84°F). This transition brings a noticeable drop in humidity to 63%, making December a more comfortable time compared to the muggy September weather. For more details, check Onitsha weather in December.
September in Onitsha is characterized by high humidity levels and significant rainfall, setting it apart from other months. With an average temperature hovering at a comfortable 26°C (79°F), this month often feels warmer due to the prevailing 91% humidity. Frequent showers and thunderstorms lead to an impressive total of 249 mm of precipitation over nearly every day of the month. Consequently, the lush greenery and vibrant landscapes emerge, offering a stunning contrast to the dryer months earlier in the year. For a more detailed look at Onitsha's overall climate patterns, visit Onitsha Climate.