January Weather in Viseu, Portugal

Last updated: August 27, 2025

In Viseu, Portugal, the average temperature in January is a cool 7°C (44°F). Expect chilly nights with a minimum dip to -4°C (25°F), while daytime highs can reach up to 18°C (65°F). Be prepared for a precipitation amount of 85 mm (3.3 in) spread over about 7 days, and enjoy the high humidity of 87% that adds to the season's atmosphere.

January Temperature in Viseu

In January in Viseu, the average temperature is 7°C (44°F). Maximum temperatures can reach 18°C (65°F), while minimums can drop as low as -4°C (25°F). Be prepared for a range of weather conditions when traveling to Viseu during this month.

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

The chart illustrates January temperature patterns in Viseu, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Viseu, January typically has an average temperature of 7°C (44°F), with highs reaching up to 18°C (65°F) and lows dropping to around -4°C (25°F).

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

January Precipitation in Viseu

In Viseu in January, the total precipitation amount is 85 mm (3.3 in) over the course of 7 days.

January Precipitation Trends in Viseu

The chart displays monthly precipitation patterns in Viseu, 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 Viseu, January typically receives around 85 mm (3.3 inches) of precipitation spread over approximately 7 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 Viseu

In Viseu in January, humidity is 87%. With an average temperature of 7°C (44°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and requiring travelers to layer up to stay warm and dry.

January Average Humidity in Viseu

This chart illustrates the average monthly humidity levels in Viseu, 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 Viseu is approximately 87%, 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 Viseu

In Viseu 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 Viseu, you can check the information here.

Maximum UV Index Levels in Viseu for January

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

Data source: Viseu 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 Viseu Compares to Other Months

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

This table compares monthly weather conditions in Viseu, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	85 mm (3.3 inches)	87%	moderate
February Weather	9°C (48°F)	134 mm (5.3 inches)	81%	moderate
March Weather	10°C (50°F)	152 mm (6.0 inches)	78%	high
April Weather	12°C (54°F)	145 mm (5.7 inches)	79%	very high
May Weather	16°C (60°F)	68 mm (2.7 inches)	78%	very high
June Weather	18°C (64°F)	49 mm (1.9 inches)	71%	extreme
July Weather	20°C (69°F)	19 mm (0.7 inches)	63%	very high
August Weather	21°C (69°F)	19 mm (0.8 inches)	64%	very high
September Weather	19°C (66°F)	47 mm (1.8 inches)	71%	very high
October Weather	15°C (59°F)	108 mm (4.3 inches)	79%	high
November Weather	10°C (50°F)	149 mm (5.9 inches)	86%	moderate
December Weather	8°C (47°F)	174 mm (6.8 inches)	87%	low