Last updated: August 27, 2025
September in Eti-Osa, Nigeria is characterized by a warm and humid climate, with average temperatures hovering around 26°C (79°F). The month sees maximum temperatures reaching 29°C (85°F) during the day, while nighttime lows dip to a comfortable 23°C (74°F). This period is notably marked by significant rainfall, accumulating to about 243 mm (9.6 in) over 28 rainy days, contributing to a high humidity level of 91%. Travelers and residents alike can expect a lush green landscape, while also preparing for frequent showers throughout the month.
In September, temperatures in Eti-Osa, Nigeria continue the trend of mild warmth, with daily minimums settling at 23°C (74°F) and maximums reaching 29°C (85°F). This marks a slight cooling from the peak heat of the earlier months, providing a comfortable average of 26°C (79°F). The transition from the more humid conditions of August is palpable, as the weather starts to prepare for the upcoming drier months. Consequently, September offers a pleasant escape, balancing warmth with a touch of relief before temperatures rise again in October. Ideal for outdoor activities, it's a month that invites both locals and visitors to enjoy the vibrant surroundings of this coastal paradise.
In September, Eti-Osa experiences a notable increase in precipitation, with 243 mm (9.6 in) of rain recorded across 28 days. This substantial rainfall contributes to the peak of the wet season, following a trend that sees rising precipitation from the drier months of January through to May, which gradually leads to heavier downpours in the latter half of the year. The rains in September are crucial for local agriculture, nourishing crops in preparation for harvest, while also hinting at the continuation of the wet season, as the area transitions into October with similarly high rainfall levels. The frequency of rain days, persisting at nearly the maximum of the month, reinforces the intense wet conditions typical for this period, establishing September as a pivotal month in the climatic calendar of Eti-Osa, Nigeria.
In Eti-Osa, Nigeria, the transition from the dry to the wet season is vividly illustrated by the rising humidity levels throughout the year. September marks the peak of this trend, with humidity reaching a notable 91%, making it the most humid month. This increase follows a steady climb from 61% in March to a staggering 90% in August. As the year progresses, the air becomes increasingly saturated, peaking in September before gradually declining to 82% in November. The contrast between the dry season—characterized by low humidity levels in January at just 37%—and the rainy season highlights the dramatic changes in the atmosphere that define Eti-Osa's climate. As the humidity begins to drop post-September, it paves the way for the cooler and drier months ahead.
In September, Eti-Osa, Nigeria experiences a UV Index of 12, falling into the extreme exposure category with a burn time of just 10 minutes. This uptick in UV intensity follows a summer marked by consistently high levels, with the index hovering around 11 since July. The trend indicates that as the year progresses into the fall, UV exposure remains perilously high, urging residents and visitors alike to take necessary precautions. The intensity is reminiscent of the earlier months, suggesting that the sun’s rays are potent enough to cause harm with minimal exposure. It's essential to remain vigilant and protect your skin, even as we transition into the latter part of the year. For more detailed information, check out the full report on the Eti-Osa UV Index.
UV Risk Categories
In September, Eti-Osa experiences a brief dip in sunshine, recording 284 hours of bright, sunny days. This month follows the high summer months of August, which boasted 309 hours of sunshine, and sets the stage for a gradual increase leading into the more sun-drenched months of October and November. Overall, it’s notable that the year begins with fewer hours of sunshine, peaking in the lushness of May with an impressive 320 hours before transitioning into a more stable late-year pattern. As the seasons shift, the sun’s prominence remains a hallmark of life in Eti-Osa, resiliently illuminating the region through the ever-changing months.
In Eti-Osa, Nigeria, the likelihood of sunny weather in September is relatively low, with only a 14% chance of sunshine. This trend continues a pattern observed from August, where the chances of clear skies plummet to a mere 10%. As the year progresses, a gradual increase in sunlight returns, peaking later in the dry season around January with a more favorable 55% probability. Thus, September stands out as a time when cloud cover dominates, contrasting sharply with the sunnier months that precede and follow it, making it a period marked by increased humidity and rainfall rather than bright, sunny days.
Throughout the year in Eti-Osa, Nigeria, daylight duration exhibits a harmonious rhythm, peaking at 12 hours from March through September. This consistent stretch of daylight contributes to the region's vibrant outdoor life during the spring and summer months. As September arrives, the sunlight remains steadfastly at 12 hours, offering a perfect balance for both residents and visitors to indulge in the scenic beauty and floral abundance. Following this peak, October to December sees a gradual decline in daylight to 11 hours, signaling the transition into the cooler months. This cyclical pattern underscores the region's unique climatic appeal, where extended daylight serves as a key feature of daily life, especially during the lush rainy season.
As September rolls in Eti-Osa, the gentle breeze begins to whisper through the streets, with an average wind speed of 2.8 m/s (6 mph). This month marks a slight decrease from the bustling gusts of July and August, which peaked at around 3.9 m/s (9 mph) and 3.7 m/s (8 mph) respectively. The transition into September signals a shift towards calmer winds, mirroring the trend observed in the earlier part of the year, when wind speeds generally hovered between 3.1 m/s and 3.4 m/s (7-8 mph) from January to April. As the rainy season draws to a close, the more moderate winds provide a refreshing reprieve, setting the stage for a tranquil start to the final months of the year.
Weather in Eti-Osa varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Eti-Osa, focusing on differences in temperature, rainfall, humidity, and UV levels.
In September, the weather tends to be quite humid and wet, with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (85°F). This month experiences significant precipitation, totaling 243 mm (9.6 in) over 28 days, leading to a high humidity level of 91%. In contrast, January is generally warmer and much drier, with temperatures averaging between 22°C (72°F) and 32°C (90°F). Precipitation is minimal, amounting to just 27 mm (1.1 in) across only 8 days, resulting in a much lower humidity level of 37%. For more insights into the climate specifics, you can check Eti-Osa weather in January.
The weather in September and February presents a stark contrast, particularly in terms of temperature and precipitation. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 29°C (85°F), accompanied by high humidity levels of 91% and significant rainfall totaling 243 mm (9.6 in) over 28 days. In comparison, February sees warmer conditions with an average temperature of 28°C (83°F), peaking at 33°C (91°F), but considerably less rainfall of only 61 mm (2.4 in) spread over 15 days. Additionally, February boasts a much lower humidity level at 44%, making it feel less oppressive than the wetter and more humid September. For more details on February's weather, visit Eti-Osa weather in February.
In September, the weather tends to be quite humid and wet, with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (85°F). The month also experiences significant precipitation levels of 243 mm (9.6 in) spread across 28 days, resulting in a humidity level of 91%. In contrast, March offers warmer temperatures, with a minimum of 24°C (76°F) and a maximum of 32°C (90°F), along with lower humidity at 61%. Precipitation in March is significantly less, totaling 116 mm (4.6 in) over 23 days. For more detailed information, you can refer to Eti-Osa weather in March.
In comparing the weather between September and April, it is evident that April tends to be slightly warmer, with average temperatures ranging from a minimum of 24°C (76°F) to a maximum of 32°C (89°F). In contrast, September's temperatures are milder, averaging between 23°C (74°F) and 29°C (85°F). Moreover, April experiences significantly less precipitation, with 112 mm (4.4 in) falling over 21 days, while September is much wetter, receiving 243 mm (9.6 in) over 28 days. Humidity levels also differ, with September being quite humid at 91%, compared to April's more comfortable 72%. For more detailed information, you can visit Eti-Osa weather in April.
In comparing the weather of September and May, September tends to be slightly cooler, with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (85°F), while May enjoys warmer conditions with temperatures from 24°C (76°F) to 32°C (90°F). Additionally, September experiences higher precipitation, totaling 243 mm (9.6 in) over 28 days, compared to May's 193 mm (7.6 in) over 26 days. Humidity levels are also higher in September at 91%, compared to 82% in May. For more specific data on this month's climate, visit Eti-Osa weather in May.
In comparing the weather patterns of September and June, both months experience warm temperatures, with September averaging around 26°C (79°F) and June slightly warmer at 27°C (80°F). However, June tends to have higher maximum temperatures, peaking at 31°C (87°F) compared to September's maximum of 29°C (85°F). Precipitation is notably heavier in June, measuring 338 mm (13.3 in) over 28 days, while September receives 243 mm (9.6 in) across the same number of days. Humidity levels are quite high in both months, with September experiencing 91% humidity versus June's 86%. For more detailed information on June's weather, you can visit Eti-Osa weather in June.
In comparing the weather of September and July, both months exhibit similar average temperatures, hovering around 26°C (79°F), with maximums reaching 29°C (85°F) in September and 29°C (84°F) in July. However, September tends to be slightly drier with 243 mm (9.6 in) of precipitation over 28 days, compared to July's 313 mm (12.3 in) over 30 days. Additionally, humidity levels are slightly higher in September at 91%, compared to 87% in July, making September feel a bit more muggy. For more detailed information about the weather in July, you can visit Eti-Osa weather in July.
In comparing the weather of September and August, it's evident that September experiences slightly higher average temperatures, with a minimum of 23°C (74°F) and an average of 26°C (79°F), compared to August's average of 25°C (78°F). Both months reach similar maximums of 29°C (84°F for August and 85°F for September). However, September sees increased precipitation, totaling 243 mm (9.6 in) over 28 days, compared to 205 mm (8.1 in) over 25 days in August. Humidity remains high in both months, with September at 91% and August slightly lower at 90%. For a more detailed look at the weather conditions, you can check Eti-Osa weather in August.
September and October exhibit similar weather patterns, yet October tends to be slightly warmer and wetter. In September, temperatures range from a minimum of 23°C (74°F) to a maximum of 29°C (85°F) with an average of 26°C (79°F). The month experiences substantial rainfall of 243 mm (9.6 in) over 28 days, alongside high humidity levels at 91%. In contrast, October sees a minimum temperature of 24°C (75°F) and a maximum of 30°C (87°F), with an average of 27°C (80°F). Precipitation increases to 252 mm (9.9 in) over the same 28 days, with a slightly lower humidity of 90%. For more detailed insights, you can check Eti-Osa weather in October.
In September, the weather tends to be quite humid, with average temperatures ranging from 23°C (74°F) to 29°C (85°F) and a high humidity level of 91%. The month also experiences significant rainfall, totaling 243 mm (9.6 in) over 28 days, making it one of the wetter months of the year. In contrast, November sees warmer temperatures, with a minimum of 25°C (76°F) and a maximum of 31°C (88°F), along with a lower average humidity of 82%. Precipitation also decreases significantly in November, with only 102 mm (4.0 in) falling across 24 days. For more details on the weather in November, you can visit this link: Eti-Osa weather in November.
In September, the weather is characterized by a warm and humid climate, with average temperatures ranging from a minimum of 23°C (74°F) to a maximum of 29°C (85°F). The month experiences significant rainfall, totaling 243 mm (9.6 in) over 28 days, contributing to a high humidity level of around 91%. In contrast, December brings a drier and warmer atmosphere, where temperatures can rise from 23°C (74°F) to an average of 32°C (90°F). With only 40 mm (1.6 in) of precipitation over just 13 days and a notable drop in humidity to 63%, December is generally more comfortable. For a detailed look at the weather in December, check Eti-Osa weather in December.
As September arrives in Eti-Osa, residents and visitors alike experience a distinctly humid and wet atmosphere, characterized by consistent rainfall and elevated humidity levels. Compared to other months, the average temperatures hover comfortably, yet the significant precipitation—spreading over nearly the entire month—marks a noticeable shift in the weather pattern. This combination creates a lush landscape, making September a vibrant time of year. For a deeper look into how this month's conditions compare with the rest of the year, visit Eti-Osa Climate.