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September Weather in Grand-Popo, Benin

Last updated: August 22, 2025

In September, the average temperature in Grand-Popo, Benin is a pleasant 26°C (79°F). You'll experience a minimum of 23°C (74°F) and peak temperatures reaching up to 30°C (86°F). However, be prepared for the likelihood of rain, as 162 mm (6.4 in) of precipitation is expected over 24 days. With an average humidity of 91%, the weather can feel quite tropical, so don’t forget to stay hydrated!

September Temperature in Grand-Popo

In September in Grand-Popo, the average temperature is 26°C (79°F). Maximums can reach 30°C (86°F), while minimums can dip as low as 23°C (74°F). This mild climate makes it an ideal destination for travelers seeking warm and comfortable conditions.

September Weather in Grand-Popo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Grand-Popo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grand-Popo, September typically has an average temperature of 26°C (79°F), with highs reaching up to 30°C (86°F) and lows dropping to around 23°C (74°F).
JanFebMarAprMayJunJulAugSepOctNovDec828484838381797879818283
Data source: Temperature data for Grand-Popo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Grand-Popo

In Grand-Popo in September, the precipitation amount is 162 mm (6.4 in) over a span of 24 days.

September Precipitation Trends in Grand-Popo

The chart displays monthly precipitation patterns in Grand-Popo, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Grand-Popo, September typically receives around 162 mm (6.4 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec21548310016423311811216221810555
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Grand-Popo

In Grand-Popo in September, humidity is 91%. With an average temperature of 26°C (79°F), this humidity feels like navigating through an invisible blanket, making even short strolls feel laborious and leaving a sticky sheen on your skin, which can be overwhelming for travelers.

September Average Humidity in Grand-Popo

This chart illustrates the average monthly humidity levels in Grand-Popo, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Grand-Popo is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec36%45%60%75%83%86%87%90%91%89%82%68%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Grand-Popo

In Grand-Popo in September, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in Grand-Popo.

Maximum UV Index Levels in Grand-Popo for September

The chart shows the monthly maximum UV Index (UVI) for Grand-Popo in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Grand-Popo typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1111121413121212121299
Data source: Grand-Popo September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in Grand-Popo Compares to Other Months

Weather in Grand-Popo varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Grand-Popo, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Grand-Popo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather28°C (83°F)21 mm (0.8 inches)36%extreme
February Weather29°C (84°F)54 mm (2.1 inches)45%extreme
March Weather29°C (84°F)83 mm (3.3 inches)60%extreme
April Weather29°C (84°F)100 mm (3.9 inches)75%extreme
May Weather28°C (83°F)164 mm (6.5 inches)83%extreme
June Weather27°C (81°F)233 mm (9.2 inches)86%extreme
July Weather26°C (79°F)118 mm (4.7 inches)87%extreme
August Weather26°C (78°F)112 mm (4.4 inches)90%extreme
September Weather26°C (79°F)162 mm (6.4 inches)91%extreme
October Weather27°C (81°F)218 mm (8.6 inches)89%extreme
November Weather28°C (83°F)105 mm (4.1 inches)82%very high
December Weather28°C (83°F)55 mm (2.2 inches)68%very high

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