January Weather in Mertola, Portugal

Last updated: August 27, 2025

In January, the average temperature in Mertola, Portugal is a cool 9°C (49°F). While you might experience a brisk minimum of -3°C (27°F), the mercury can climb to a pleasant 22°C (71°F) on warmer days. With an average humidity of 80% and 23 mm (0.9 in) of precipitation over 3 days, be prepared for both the chill and the occasional drizzle!

January Temperature in Mertola

In January in Mertola, the average temperature is 9°C (49°F). Maximum temperatures can reach 22°C (71°F), while minimums can drop to as low as -3°C (27°F). This varied climate makes Mertola an ideal destination for travelers looking to experience a mix of cool and mild weather.

January Weather in Mertola: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Mertola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mertola, January typically has an average temperature of 9°C (49°F), with highs reaching up to 22°C (71°F) and lows dropping to around -3°C (27°F).

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

January Precipitation in Mertola

In Mertola in January, the precipitation amount is 23 mm (0.9 in) over the course of 3 days.

January Precipitation Trends in Mertola

The chart displays monthly precipitation patterns in Mertola, 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 Mertola, January typically receives around 23 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 Mertola

In Mertola in January, humidity is 80%. With an average temperature of 9°C (49°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and prompting a need for layered clothing to stay comfortable while traveling.

January Average Humidity in Mertola

This chart illustrates the average monthly humidity levels in Mertola, 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 Mertola 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 Mertola

In Mertola 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 Mertola, you can check the information here.

Maximum UV Index Levels in Mertola for January

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

Data source: Mertola 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 Mertola Compares to Other Months

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

This table compares monthly weather conditions in Mertola, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	23 mm (0.9 inches)	80%	moderate
February Weather	12°C (54°F)	37 mm (1.5 inches)	73%	moderate
March Weather	13°C (56°F)	67 mm (2.7 inches)	71%	high
April Weather	15°C (60°F)	55 mm (2.2 inches)	69%	very high
May Weather	20°C (68°F)	26 mm (1.0 inches)	69%	very high
June Weather	22°C (72°F)	9 mm (0.4 inches)	67%	extreme
July Weather	24°C (76°F)	2 mm (0.1 inches)	69%	extreme
August Weather	26°C (78°F)	2 mm (0.1 inches)	68%	very high
September Weather	23°C (74°F)	22 mm (0.8 inches)	71%	very high
October Weather	19°C (67°F)	38 mm (1.5 inches)	75%	high
November Weather	14°C (57°F)	48 mm (1.9 inches)	78%	moderate
December Weather	11°C (53°F)	40 mm (1.6 inches)	81%	moderate