December Weather in Sao Tome, Sao Tome and Principe

Last updated: August 31, 2025

In December, the average temperature in Sao Tome, Sao Tome and Principe is a delightful 26°C (80°F). Expect a minimum of 25°C (76°F) and a maximum of 28°C (82°F), making it a warm month overall. However, be prepared for some rain, as 257 mm (10.1 in) of precipitation can fall over 28 days. With an average humidity of 76%, the air will feel quite humid, so stay hydrated and enjoy the warm weather!

December Temperature in Sao Tome

In December in Sao Tome, the average temperature is 26°C (80°F), with maximums reaching up to 28°C (82°F) and minimums dipping to 25°C (76°F). This pleasant climate makes it an ideal destination for travelers seeking warm weather.

December Weather in Sao Tome: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sao Tome, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sao Tome, December typically has an average temperature of 26°C (80°F), with highs reaching up to 28°C (82°F) and lows dropping to around 25°C (76°F).

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

December Precipitation in Sao Tome

In Sao Tome in December, the precipitation amount is 257 mm (10.1 in) over a span of 28 days.

December Precipitation Trends in Sao Tome

The chart displays monthly precipitation patterns in Sao Tome, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Sao Tome, December typically receives around 257 mm (10.1 inches) of precipitation spread over approximately 28 days.

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

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Millimeters (mm) Inches (in)

December Humidity in Sao Tome

In Sao Tome in December humidity is 76%. With an average temperature of 26°C (80°F), this humidity feels like a heavy blanket enveloping you, making travel feel stifling and exhausting as you navigate the sticky air and sweat-drenched clothes.

December Average Humidity in Sao Tome

This chart illustrates the average monthly humidity levels in Sao Tome, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Sao Tome is approximately 76%, offering insight into how humid the weather typically is during this month.

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

December UV Index in Sao Tome

In Sao Tome in December, 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 Sao Tome.

Maximum UV Index Levels in Sao Tome for December

The chart shows the monthly maximum UV Index (UVI) for Sao Tome in December, 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 December, the maximum UV index in Sao Tome typically reaches 12, which falls under the extreme exposure category.

Data source: Sao Tome December 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 December Weather in Sao Tome Compares to Other Months

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

This table compares monthly weather conditions in Sao Tome, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	27°C (80°F)	129 mm (5.1 inches)	75%	extreme
February Weather	27°C (81°F)	130 mm (5.1 inches)	75%	extreme
March Weather	27°C (81°F)	148 mm (5.8 inches)	73%	extreme
April Weather	27°C (81°F)	158 mm (6.2 inches)	74%	extreme
May Weather	27°C (80°F)	154 mm (6.1 inches)	75%	extreme
June Weather	25°C (78°F)	39 mm (1.5 inches)	76%	very high
July Weather	24°C (76°F)	17 mm (0.7 inches)	76%	very high
August Weather	24°C (76°F)	26 mm (1.0 inches)	83%	extreme
September Weather	25°C (77°F)	53 mm (2.1 inches)	86%	extreme
October Weather	26°C (79°F)	171 mm (6.7 inches)	85%	extreme
November Weather	26°C (79°F)	229 mm (9.0 inches)	81%	extreme
December Weather	26°C (80°F)	257 mm (10.1 inches)	76%	extreme