January Weather in Sao Martinho do Porto, Portugal

Last updated: August 27, 2025

In January, the average temperature in Sao Martinho do Porto, Portugal hovers around 12°C (54°F). Expect minimums to dip to 4°C (40°F) and climb to a pleasant 19°C (67°F). During this period, you can anticipate 50 mm (2.0 in) of precipitation spread over 7 days, with an average humidity level of 85%.

January Temperature in Sao Martinho do Porto

In January in Sao Martinho do Porto, the average temperature is 12°C (54°F), with a maximum that can reach 19°C (67°F) and a minimum that can dip as low as 4°C (40°F). This mild climate makes it a great time for travelers to explore Sao Martinho do Porto comfortably.

January Weather in Sao Martinho do Porto: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Sao Martinho do Porto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sao Martinho do Porto, January typically has an average temperature of 12°C (54°F), with highs reaching up to 19°C (67°F) and lows dropping to around 4°C (40°F).

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

January Precipitation in Sao Martinho do Porto

In Sao Martinho do Porto in January, the precipitation amount is 50 mm (2.0 in) over a span of 7 days.

January Precipitation Trends in Sao Martinho do Porto

The chart displays monthly precipitation patterns in Sao Martinho do Porto, 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 Sao Martinho do Porto, January typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 7 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Sao Martinho do Porto

In Sao Martinho do Porto in January, humidity is 85%. With an average temperature of 12°C (54°F), this humidity feels like a heavy blanket wrapping around you, making traveling not only uncomfortable but also exhausting as the damp air clings to your skin and slows your movements.

January Average Humidity in Sao Martinho do Porto

This chart illustrates the average monthly humidity levels in Sao Martinho do Porto, 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 Sao Martinho do Porto is approximately 85%, 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 Sao Martinho do Porto

In Sao Martinho do Porto 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 Sao Martinho do Porto, you can check the information here.

Maximum UV Index Levels in Sao Martinho do Porto for January

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

Data source: Sao Martinho do Porto 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 Sao Martinho do Porto Compares to Other Months

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

This table compares monthly weather conditions in Sao Martinho do Porto, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	50 mm (2.0 inches)	85%	moderate
February Weather	13°C (56°F)	55 mm (2.1 inches)	75%	moderate
March Weather	13°C (57°F)	73 mm (2.9 inches)	72%	high
April Weather	15°C (59°F)	80 mm (3.1 inches)	70%	very high
May Weather	17°C (63°F)	39 mm (1.5 inches)	70%	very high
June Weather	18°C (65°F)	24 mm (1.0 inches)	63%	extreme
July Weather	19°C (67°F)	12 mm (0.5 inches)	60%	very high
August Weather	20°C (68°F)	7 mm (0.3 inches)	60%	very high
September Weather	19°C (67°F)	24 mm (1.0 inches)	67%	very high
October Weather	18°C (64°F)	69 mm (2.7 inches)	74%	high
November Weather	15°C (59°F)	91 mm (3.6 inches)	83%	moderate
December Weather	13°C (56°F)	73 mm (2.9 inches)	85%	moderate