January Weather in Seixal, Portugal

Last updated: August 27, 2025

In January, the average temperature in Seixal, Portugal hovers around 11°C (51°F), with minimums dipping to 0°C (31°F) and maximums reaching up to 20°C (69°F). Expect an average precipitation of 33 mm (1.3 in) spread over 4 days, accompanied by a high humidity level of 85%. Make sure to prepare accordingly!

January Temperature in Seixal

In January in Seixal, the average temperature is 11°C (51°F). The maximum can reach 20°C (69°F), and the minimum can drop as low as 0°C (31°F). This mild climate makes Seixal a great destination for outdoor activities and sightseeing.

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

The chart illustrates January temperature patterns in Seixal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Seixal, January typically has an average temperature of 11°C (51°F), with highs reaching up to 20°C (69°F) and lows dropping to around 0°C (31°F).

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

January Precipitation in Seixal

In Seixal in January, the precipitation amount is 33 mm (1.3 in) over a span of 4 days.

January Precipitation Trends in Seixal

The chart displays monthly precipitation patterns in Seixal, 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 Seixal, January typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 4 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 Seixal

In Seixal in January humidity is 85%. With an average temperature of 11°C (51°F), this humidity feels like a chilly embrace that seeps into your bones, making outdoor activities a bit uncomfortable and encouraging a more relaxed, slow-paced exploration of the area.

January Average Humidity in Seixal

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

In Seixal 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 Seixal, you can check the information here.

Maximum UV Index Levels in Seixal for January

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

Data source: Seixal 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 Seixal Compares to Other Months

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

This table compares monthly weather conditions in Seixal, 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 (51°F)	33 mm (1.3 inches)	85%	moderate
February Weather	12°C (55°F)	50 mm (2.0 inches)	75%	moderate
March Weather	14°C (57°F)	68 mm (2.7 inches)	72%	high
April Weather	15°C (59°F)	72 mm (2.8 inches)	70%	very high
May Weather	18°C (65°F)	38 mm (1.5 inches)	70%	very high
June Weather	20°C (68°F)	10 mm (0.4 inches)	63%	extreme
July Weather	22°C (71°F)	5 mm (0.2 inches)	60%	very high
August Weather	22°C (72°F)	3 mm (0.1 inches)	60%	very high
September Weather	21°C (71°F)	24 mm (0.9 inches)	67%	very high
October Weather	19°C (66°F)	42 mm (1.7 inches)	74%	high
November Weather	14°C (58°F)	74 mm (2.9 inches)	83%	moderate
December Weather	12°C (54°F)	55 mm (2.2 inches)	85%	moderate