September Weather in Port-Gentil, Gabon

Last updated: August 23, 2025

In September, the average temperature in Port-Gentil, Gabon is a pleasant 25°C (78°F). Expect a minimum of 24°C (75°F) and a maximum that reaches 27°C (81°F). This month, prepare for 50 mm (2.0 in) of precipitation spread across approximately 11 days, and stay hydrated with an average humidity of 87%.

September Temperature in Port-Gentil

In September in Port-Gentil, the average temperature is 25°C (78°F). Maximums can reach 27°C (81°F) while minimums can drop to 24°C (75°F). This mild climate makes it an ideal destination for travel during this time.

September Weather in Port-Gentil: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Port-Gentil, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port-Gentil, September typically has an average temperature of 25°C (78°F), with highs reaching up to 27°C (81°F) and lows dropping to around 24°C (75°F).

Data source: Temperature data for Port-Gentil generated using information from the Copernicus Climate Change Service.

September Precipitation in Port-Gentil

In Port-Gentil in September, the precipitation amount is 50 mm (2.0 in) over the course of 11 days.

September Precipitation Trends in Port-Gentil

The chart displays monthly precipitation patterns in Port-Gentil, 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 Port-Gentil, September typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 11 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

September Humidity in Port-Gentil

In Port-Gentil in September, humidity is 87%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities particularly strenuous and requiring frequent breaks for hydration and shade.

September Average Humidity in Port-Gentil

This chart illustrates the average monthly humidity levels in Port-Gentil, 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 Port-Gentil is approximately 87%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Port-Gentil

In Port-Gentil 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 Port-Gentil.

Maximum UV Index Levels in Port-Gentil for September

The chart shows the monthly maximum UV Index (UVI) for Port-Gentil 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 Port-Gentil typically reaches 12, which falls under the extreme exposure category.

Data source: Port-Gentil 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 Port-Gentil Compares to Other Months

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

This table compares monthly weather conditions in Port-Gentil, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (80°F)	264 mm (10.4 inches)	82%	extreme
February Weather	27°C (81°F)	199 mm (7.8 inches)	81%	extreme
March Weather	27°C (82°F)	174 mm (6.9 inches)	81%	extreme
April Weather	27°C (81°F)	174 mm (6.9 inches)	82%	extreme
May Weather	27°C (80°F)	152 mm (6.0 inches)	83%	extreme
June Weather	25°C (77°F)	32 mm (1.3 inches)	82%	very high
July Weather	24°C (75°F)	16 mm (0.6 inches)	83%	very high
August Weather	24°C (76°F)	20 mm (0.8 inches)	86%	extreme
September Weather	25°C (78°F)	50 mm (2.0 inches)	87%	extreme
October Weather	26°C (79°F)	196 mm (7.7 inches)	87%	extreme
November Weather	26°C (79°F)	277 mm (10.9 inches)	87%	extreme
December Weather	26°C (80°F)	299 mm (11.8 inches)	84%	extreme