January Weather in Castro Marim, Portugal

Last updated: August 27, 2025

In January, the average temperature in Castro Marim, Portugal hovers around 11°C (52°F), with a minimum dip to 2°C (35°F) and a comfortable maximum reaching up to 21°C (69°F). This period also sees 22 mm (0.9 in) of precipitation spread over approximately 3 days, contributing to the area's 80% average humidity. Whether you're exploring or relaxing, be prepared for a mix of mild temperatures and occasional showers!

January Temperature in Castro Marim

In January in Castro Marim, the average temperature is 11°C (52°F). Maximums can reach 21°C (69°F) and minimums can be as low as 2°C (35°F). This mild climate makes Castro Marim an ideal destination for travelers looking to explore comfortably.

January Weather in Castro Marim: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Castro Marim, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castro Marim, January typically has an average temperature of 11°C (52°F), with highs reaching up to 21°C (69°F) and lows dropping to around 2°C (35°F).

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

January Precipitation in Castro Marim

In Castro Marim in January, the precipitation amount is 22 mm (0.9 in) over a span of 3 days.

January Precipitation Trends in Castro Marim

The chart displays monthly precipitation patterns in Castro Marim, 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 Castro Marim, January typically receives around 22 mm (0.9 inches) of precipitation spread over approximately 3 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 Castro Marim

In Castro Marim in January, humidity is 80%. With an average temperature of 11°C (52°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable as you navigate through the thick, languid air.

January Average Humidity in Castro Marim

This chart illustrates the average monthly humidity levels in Castro Marim, 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 Castro Marim is approximately 80%, 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 Castro Marim

In Castro Marim in January, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Castro Marim, you can check the information here.

Maximum UV Index Levels in Castro Marim for January

The chart shows the monthly maximum UV Index (UVI) for Castro Marim 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 Castro Marim typically reaches 3, which falls under the moderate exposure category.

Data source: Castro Marim 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 Castro Marim Compares to Other Months

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

This table compares monthly weather conditions in Castro Marim, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	22 mm (0.9 inches)	80%	moderate
February Weather	13°C (55°F)	38 mm (1.5 inches)	73%	moderate
March Weather	14°C (58°F)	54 mm (2.1 inches)	71%	high
April Weather	16°C (61°F)	55 mm (2.2 inches)	69%	very high
May Weather	20°C (68°F)	19 mm (0.8 inches)	69%	very high
June Weather	22°C (73°F)	5 mm (0.2 inches)	67%	extreme
July Weather	25°C (78°F)	2 mm (0.1 inches)	69%	very high
August Weather	26°C (79°F)	1 mm (0.0 inches)	68%	very high
September Weather	24°C (75°F)	19 mm (0.8 inches)	71%	very high
October Weather	20°C (68°F)	25 mm (1.0 inches)	75%	high
November Weather	15°C (59°F)	54 mm (2.1 inches)	78%	moderate
December Weather	13°C (55°F)	37 mm (1.4 inches)	81%	moderate