December Weather in Monte Siao, Brazil

Last updated: August 22, 2025

In December, the average temperature in Monte Siao, Brazil hovers around 23°C (73°F), offering a delightful climate for any activity. Be prepared for a range of temperatures, where the minimum can drop to 13°C (56°F) and the maximum can soar to 33°C (91°F). With an average humidity of 80%, the atmosphere feels quite tropical. However, do expect some rain, as precipitation averages 163 mm (6.4 in) over 17 days.

December Temperature in Monte Siao

In December in Monte Siao, the average temperature is 23°C (73°F). Maximums can reach 33°C (91°F), and minimums can be as low as 13°C (56°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

December Weather in Monte Siao: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Monte Siao, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Monte Siao, December typically has an average temperature of 23°C (73°F), with highs reaching up to 33°C (91°F) and lows dropping to around 13°C (56°F).

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

December Precipitation in Monte Siao

In Monte Siao in December, the precipitation amount is 163 mm (6.4 in) over the course of 17 days.

December Precipitation Trends in Monte Siao

The chart displays monthly precipitation patterns in Monte Siao, 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 Monte Siao, December typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 17 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 Monte Siao

In Monte Siao in December humidity is 80%. With an average temperature of 23°C (73°F), this humidity feels like a warm blanket enveloping you, making outdoor activities slightly sticky and requiring frequent breaks in shaded areas to stay comfortable while exploring.

December Average Humidity in Monte Siao

This chart illustrates the average monthly humidity levels in Monte Siao, 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 Monte Siao is approximately 80%, 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 Monte Siao

In Monte Siao in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in Monte Siao.

Maximum UV Index Levels in Monte Siao for December

The chart shows the monthly maximum UV Index (UVI) for Monte Siao 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 Monte Siao typically reaches 16, which falls under the extreme exposure category.

Data source: Monte Siao 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 Monte Siao Compares to Other Months

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

This table compares monthly weather conditions in Monte Siao, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	23°C (74°F)	175 mm (6.9 inches)	88%	extreme
February Weather	23°C (73°F)	153 mm (6.0 inches)	88%	extreme
March Weather	22°C (73°F)	107 mm (4.2 inches)	87%	extreme
April Weather	21°C (69°F)	43 mm (1.7 inches)	84%	extreme
May Weather	18°C (65°F)	39 mm (1.5 inches)	79%	very high
June Weather	18°C (64°F)	17 mm (0.6 inches)	77%	high
July Weather	17°C (62°F)	10 mm (0.4 inches)	72%	very high
August Weather	18°C (65°F)	36 mm (1.4 inches)	65%	very high
September Weather	22°C (72°F)	38 mm (1.5 inches)	58%	extreme
October Weather	22°C (72°F)	117 mm (4.6 inches)	50%	extreme
November Weather	22°C (72°F)	126 mm (5.0 inches)	75%	extreme
December Weather	23°C (73°F)	163 mm (6.4 inches)	80%	extreme