September Weather in Tonga, Cameroon

Last updated: August 22, 2025

In Tonga, Cameroon, the average temperature for September is a pleasant 22°C (72°F). Expect minimums around 18°C (64°F) and maximums soaring up to 30°C (86°F). However, be prepared for frequent showers, as the area receives a noteworthy 232 mm (9.1 in) of precipitation over 28 days. With an average humidity of 92%, it's essential to stay hydrated and embrace the lush, vibrant atmosphere!

September Temperature in Tonga

In September in Tonga, the average temperature is 22°C (72°F). Maximum temperatures can reach 30°C (86°F) and minimums can be as low as 18°C (64°F). This makes it an ideal time for travelers to enjoy pleasant weather and outdoor activities.

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

The chart illustrates September temperature patterns in Tonga, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tonga, September typically has an average temperature of 22°C (72°F), with highs reaching up to 30°C (86°F) and lows dropping to around 18°C (64°F).

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

September Precipitation in Tonga

In Tonga in September, the precipitation amount is 232 mm (9.1 in) over a span of 28 days.

September Precipitation Trends in Tonga

The chart displays monthly precipitation patterns in Tonga, 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 Tonga, September typically receives around 232 mm (9.1 inches) of precipitation spread over approximately 28 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 Tonga

In Tonga in September humidity is 92%. With an average temperature of 22°C (72°F), this humidity feels like a heavy blanket wrapping around you, making every step feel laborious and the air thick and muggy, which can be quite challenging for traveling.

September Average Humidity in Tonga

This chart illustrates the average monthly humidity levels in Tonga, 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 Tonga is approximately 92%, 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 Tonga

In Tonga in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Tonga.

Maximum UV Index Levels in Tonga for September

The chart shows the monthly maximum UV Index (UVI) for Tonga 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 Tonga typically reaches 13, which falls under the extreme exposure category.

Data source: Tonga 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 Tonga Compares to Other Months

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

This table compares monthly weather conditions in Tonga, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (77°F)	9 mm (0.3 inches)	62%	extreme
February Weather	26°C (79°F)	20 mm (0.8 inches)	61%	extreme
March Weather	25°C (77°F)	71 mm (2.8 inches)	73%	extreme
April Weather	24°C (76°F)	128 mm (5.1 inches)	85%	extreme
May Weather	24°C (75°F)	154 mm (6.1 inches)	88%	extreme
June Weather	23°C (74°F)	148 mm (5.8 inches)	89%	extreme
July Weather	22°C (72°F)	158 mm (6.2 inches)	89%	extreme
August Weather	22°C (72°F)	174 mm (6.8 inches)	91%	extreme
September Weather	22°C (72°F)	232 mm (9.1 inches)	92%	extreme
October Weather	23°C (73°F)	196 mm (7.7 inches)	92%	extreme
November Weather	23°C (74°F)	95 mm (3.8 inches)	86%	extreme
December Weather	24°C (76°F)	8 mm (0.3 inches)	75%	very high