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September Weather in Semi, Benin

Last updated: August 22, 2025

In September, the average temperature in Semi, Benin is a pleasant 26°C (78°F). You can expect a minimum of 24°C (75°F) and a maximum of 27°C (81°F). However, with an average humidity of 91% and 152 mm (6.0 in) of precipitation over 20 days, it's wise to be prepared for a bit of rain while enjoying the warmth!

September Temperature in Semi

In September in Semi, the average temperature is 26°C (78°F), with maximums reaching 27°C (81°F) and minimums dipping to 24°C (75°F). This pleasant climate makes it an ideal destination for travelers looking to enjoy mild and comfortable weather.

September Weather in Semi: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Semi, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Semi, September typically has an average temperature of 26°C (78°F), with highs reaching up to 27°C (81°F) and lows dropping to around 24°C (75°F).
JanFebMarAprMayJunJulAugSepOctNovDec818283838280787778808282
Data source: Temperature data for Semi 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 Semi

In Semi in September, the total precipitation amount is 152 mm (6.0 in) spread over a period of 20 days.

September Precipitation Trends in Semi

The chart displays monthly precipitation patterns in Semi, 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 Semi, September typically receives around 152 mm (6.0 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec184057581382721371061531915929
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Semi

In Semi in September humidity is 91%. With an average temperature of 26°C (78°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities challenging and perspiration inevitable, creating a heavy atmosphere that may lead travelers to seek shade and refreshing drinks more frequently.

September Average Humidity in Semi

This chart illustrates the average monthly humidity levels in Semi, 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 Semi 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 Semi

In Semi 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 Semi.

Maximum UV Index Levels in Semi for September

The chart shows the monthly maximum UV Index (UVI) for Semi 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 Semi typically reaches 12, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1111121412111212121299
Data source: Semi 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 Semi Compares to Other Months

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

This table compares monthly weather conditions in Semi, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (81°F)18 mm (0.7 inches)36%extreme
February Weather28°C (82°F)40 mm (1.6 inches)45%extreme
March Weather28°C (83°F)57 mm (2.2 inches)60%extreme
April Weather28°C (83°F)58 mm (2.3 inches)75%extreme
May Weather28°C (82°F)138 mm (5.4 inches)83%extreme
June Weather27°C (80°F)272 mm (10.7 inches)86%extreme
July Weather25°C (78°F)137 mm (5.4 inches)87%extreme
August Weather25°C (77°F)106 mm (4.2 inches)90%extreme
September Weather26°C (78°F)152 mm (6.0 inches)91%extreme
October Weather27°C (80°F)190 mm (7.5 inches)89%extreme
November Weather28°C (82°F)58 mm (2.3 inches)82%very high
December Weather28°C (82°F)29 mm (1.1 inches)68%very high

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