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September Weather in Porto-Novo, Benin

Last updated: August 22, 2025

In Porto-Novo, Benin, the average temperature in September soars to a warm 26°C (79°F), with daily highs reaching up to 30°C (85°F) and lows dipping to a cozy 23°C (73°F). Be prepared for the possibility of rain, as 196 mm (7.7 in) of precipitation falls across 24 days. Plus, the atmosphere is quite humid, with average humidity levels at a staggering 91%.

September Temperature in Porto-Novo

In September in Porto-Novo, the average temperature is 26°C (79°F). The maximum can reach 30°C (85°F), while the minimum can be as low as 23°C (73°F). This pleasant and warm climate makes it an ideal destination for travelers seeking sunny days and outdoor adventures.

September Weather in Porto-Novo: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Porto-Novo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Porto-Novo, September typically has an average temperature of 26°C (79°F), with highs reaching up to 30°C (85°F) and lows dropping to around 23°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec818383838280787879808182
Data source: Temperature data for Porto-Novo 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 Porto-Novo

In Porto-Novo in September, the precipitation amount is 196 mm (7.7 in) over a period of 24 days.

September Precipitation Trends in Porto-Novo

The chart displays monthly precipitation patterns in Porto-Novo, 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 Porto-Novo, September typically receives around 196 mm (7.7 inches) of precipitation spread over approximately 24 days.
JanFebMarAprMayJunJulAugSepOctNovDec215179821442491661461962309443
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Porto-Novo

In Porto-Novo 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 Porto-Novo

This chart illustrates the average monthly humidity levels in Porto-Novo, 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 Porto-Novo 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 Porto-Novo

In Porto-Novo 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 Porto-Novo.

Maximum UV Index Levels in Porto-Novo for September

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

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

This table compares monthly weather conditions in Porto-Novo, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (82°F)21 mm (0.8 inches)36%extreme
February Weather28°C (83°F)51 mm (2.0 inches)45%extreme
March Weather28°C (83°F)79 mm (3.1 inches)60%extreme
April Weather28°C (83°F)82 mm (3.2 inches)75%extreme
May Weather28°C (82°F)144 mm (5.7 inches)83%extreme
June Weather27°C (80°F)249 mm (9.8 inches)86%extreme
July Weather26°C (79°F)166 mm (6.5 inches)87%extreme
August Weather25°C (78°F)146 mm (5.7 inches)90%extreme
September Weather26°C (79°F)196 mm (7.7 inches)91%extreme
October Weather27°C (80°F)230 mm (9.1 inches)89%extreme
November Weather27°C (82°F)94 mm (3.7 inches)82%very high
December Weather28°C (82°F)43 mm (1.7 inches)68%very high

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