January Weather in Castelo Branco, Portugal

Last updated: August 27, 2025

In January, the average temperature in Castelo Branco, Portugal hovers around 8°C (47°F). Temperatures can vary, with a minimum of -3°C (27°F) and a maximum reaching 19°C (66°F). Expect about 33 mm (1.3 in) of precipitation spread over 5 days, and prepare for a muggy atmosphere with an average humidity of 85%.

January Temperature in Castelo Branco

In January in Castelo Branco, the average temperature is 8°C (47°F), with maximums reaching 19°C (66°F) and minimums dropping to as low as -3°C (27°F). This variation in temperature makes it essential to pack layers for your trip, ensuring you're prepared for both mild and cold conditions.

January Weather in Castelo Branco: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Castelo Branco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelo Branco, January typically has an average temperature of 8°C (47°F), with highs reaching up to 19°C (66°F) and lows dropping to around -3°C (27°F).

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

January Precipitation in Castelo Branco

In Castelo Branco in January, the precipitation amount is 33 mm (1.3 in) over the course of 5 days.

January Precipitation Trends in Castelo Branco

The chart displays monthly precipitation patterns in Castelo Branco, 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 Castelo Branco, January typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 5 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 Castelo Branco

In Castelo Branco in January humidity is 85%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities feel less refreshing and more uncomfortable for traveling.

January Average Humidity in Castelo Branco

This chart illustrates the average monthly humidity levels in Castelo Branco, 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 Castelo Branco 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 Castelo Branco

In Castelo Branco 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 Castelo Branco, you can check the information here.

Maximum UV Index Levels in Castelo Branco for January

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

Data source: Castelo Branco 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 Castelo Branco Compares to Other Months

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

This table compares monthly weather conditions in Castelo Branco, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	33 mm (1.3 inches)	85%	moderate
February Weather	11°C (52°F)	50 mm (2.0 inches)	75%	moderate
March Weather	12°C (54°F)	78 mm (3.1 inches)	72%	high
April Weather	15°C (58°F)	75 mm (2.9 inches)	70%	very high
May Weather	19°C (67°F)	29 mm (1.2 inches)	70%	very high
June Weather	22°C (72°F)	12 mm (0.5 inches)	63%	extreme
July Weather	25°C (77°F)	3 mm (0.1 inches)	60%	very high
August Weather	25°C (78°F)	3 mm (0.1 inches)	60%	very high
September Weather	23°C (73°F)	33 mm (1.3 inches)	67%	very high
October Weather	18°C (65°F)	53 mm (2.1 inches)	74%	high
November Weather	12°C (54°F)	76 mm (3.0 inches)	83%	moderate
December Weather	10°C (50°F)	65 mm (2.6 inches)	85%	moderate