December Weather in Sao Mateus do Maranhao, Brazil

Last updated: August 22, 2025

In December, the average temperature in Sao Mateus do Maranhao, Brazil is a warm 28°C (84°F). Temperatures can vary, with a minimum of 22°C (73°F) and soaring to a maximum of 40°C (103°F). Expect about 111 mm (4.4 in) of precipitation spread over 16 days, contributing to an average humidity level of 76%. Stay cool and hydrated during your visit!

December Temperature in Sao Mateus do Maranhao

In December in Sao Mateus do Maranhao, the average temperature is 28°C (84°F). The maximum can reach 40°C (103°F), while the minimum can be as low as 22°C (73°F). It's a great time to enjoy outdoor activities and explore the vibrant culture, but be sure to stay hydrated and seek shade during the hottest parts of the day.

December Weather in Sao Mateus do Maranhao: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sao Mateus do Maranhao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sao Mateus do Maranhao, December typically has an average temperature of 28°C (84°F), with highs reaching up to 40°C (103°F) and lows dropping to around 22°C (73°F).

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

December Precipitation in Sao Mateus do Maranhao

In Sao Mateus do Maranhao in December, the precipitation amount is 111 mm (4.4 in) occurring over the course of 16 days.

December Precipitation Trends in Sao Mateus do Maranhao

The chart displays monthly precipitation patterns in Sao Mateus do Maranhao, 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 Mateus do Maranhao, December typically receives around 111 mm (4.4 inches) of precipitation spread over approximately 16 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 Mateus do Maranhao

In Sao Mateus do Maranhao in December humidity is 76%. With an average temperature of 28°C (84°F), this humidity feels like a warm and sticky embrace, making outdoor activities exhausting and travel less comfortable, as every step seems to pull on your energy.

December Average Humidity in Sao Mateus do Maranhao

This chart illustrates the average monthly humidity levels in Sao Mateus do Maranhao, 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 Mateus do Maranhao 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 Mateus do Maranhao

In Sao Mateus do Maranhao in December, 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 Sao Mateus do Maranhao.

Maximum UV Index Levels in Sao Mateus do Maranhao for December

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

Data source: Sao Mateus do Maranhao 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 Mateus do Maranhao Compares to Other Months

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

This table compares monthly weather conditions in Sao Mateus do Maranhao, 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 (81°F)	243 mm (9.6 inches)	90%	extreme
February Weather	27°C (81°F)	290 mm (11.4 inches)	91%	extreme
March Weather	27°C (80°F)	365 mm (14.4 inches)	92%	extreme
April Weather	27°C (81°F)	279 mm (11.0 inches)	93%	extreme
May Weather	27°C (82°F)	110 mm (4.3 inches)	88%	extreme
June Weather	28°C (82°F)	29 mm (1.1 inches)	75%	extreme
July Weather	28°C (82°F)	17 mm (0.7 inches)	52%	extreme
August Weather	29°C (84°F)	6 mm (0.2 inches)	42%	extreme
September Weather	30°C (86°F)	6 mm (0.2 inches)	36%	extreme
October Weather	30°C (86°F)	20 mm (0.8 inches)	35%	extreme
November Weather	29°C (85°F)	77 mm (3.1 inches)	43%	extreme
December Weather	28°C (84°F)	111 mm (4.4 inches)	76%	extreme