January Weather in Castelo do Piaui, Brazil

Last updated: August 22, 2025

In January, the average temperature in Castelo do Piaui, Brazil hovers around 28°C (83°F), with minimums dipping to 21°C (71°F) and maximums soaring to 39°C (102°F). Expect a precipitation amount of 116 mm (4.6 in) spread across about 15 days, contributing to a high average humidity of 90%. Whether you're exploring or relaxing, be prepared for a humid atmosphere!

January Temperature in Castelo do Piaui

In January in Castelo do Piaui, the average temperature is 28°C (83°F). Maximum temperatures can reach 39°C (102°F), while minimums can dip as low as 21°C (71°F). This warm climate makes Castelo do Piaui an ideal destination for travelers seeking sunny and pleasant weather.

January Weather in Castelo do Piaui: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Castelo do Piaui, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelo do Piaui, January typically has an average temperature of 28°C (83°F), with highs reaching up to 39°C (102°F) and lows dropping to around 21°C (71°F).

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

January Precipitation in Castelo do Piaui

In Castelo do Piaui in January, the total precipitation amount is 116 mm (4.6 in), occurring over a span of 15 days.

January Precipitation Trends in Castelo do Piaui

The chart displays monthly precipitation patterns in Castelo do Piaui, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Castelo do Piaui, January typically receives around 116 mm (4.6 inches) of precipitation spread over approximately 15 days.

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

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Millimeters (mm) Inches (in)

January Humidity in Castelo do Piaui

In Castelo do Piaui in January humidity is 90%. With an average temperature of 28°C (83°F), this humidity feels like walking through a warm, damp blanket, making travel strenuous and uncomfortable as sweat clings to your skin, and the air feels thick and heavy with moisture.

January Average Humidity in Castelo do Piaui

This chart illustrates the average monthly humidity levels in Castelo do Piaui, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Castelo do Piaui is approximately 90%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Castelo do Piaui

In Castelo do Piaui in January, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Castelo do Piaui, you can check here.

Maximum UV Index Levels in Castelo do Piaui for January

The chart shows the monthly maximum UV Index (UVI) for Castelo do Piaui in January, 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 January, the maximum UV index in Castelo do Piaui typically reaches 14, which falls under the extreme exposure category.

Data source: Castelo do Piaui January 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 January Weather in Castelo do Piaui Compares to Other Months

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

This table compares monthly weather conditions in Castelo do Piaui, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	28°C (83°F)	116 mm (4.6 inches)	90%	extreme
February Weather	27°C (81°F)	263 mm (10.4 inches)	91%	extreme
March Weather	27°C (80°F)	298 mm (11.7 inches)	93%	extreme
April Weather	27°C (80°F)	177 mm (7.0 inches)	93%	extreme
May Weather	27°C (82°F)	42 mm (1.7 inches)	88%	extreme
June Weather	28°C (83°F)	3 mm (0.1 inches)	75%	extreme
July Weather	28°C (83°F)	7 mm (0.3 inches)	55%	extreme
August Weather	30°C (86°F)	1 mm (0.0 inches)	46%	extreme
September Weather	31°C (88°F)	1 mm (0.0 inches)	41%	extreme
October Weather	31°C (89°F)	7 mm (0.3 inches)	38%	extreme
November Weather	31°C (88°F)	20 mm (0.8 inches)	43%	extreme
December Weather	30°C (86°F)	38 mm (1.5 inches)	67%	extreme