January Weather in Castro Daire, Portugal

Last updated: August 27, 2025

In January, the average temperature in Castro Daire, Portugal hovers around 6°C (43°F), with temperatures dipping as low as -5°C (23°F) and reaching a maximum of 18°C (65°F). Be prepared for some rain, as 84 mm (3.3 in) of precipitation is expected over the course of 8 days, coupled with an average humidity of 87%, creating a distinctly chilly and damp atmosphere.

January Temperature in Castro Daire

In January in Castro Daire, the average temperature is 6°C (43°F), with maximums reaching up to 18°C (65°F) and minimums dropping as low as -5°C (23°F). Be prepared for a mix of chilly and mild weather, making it essential to pack layers for your travels.

January Weather in Castro Daire: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Castro Daire, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castro Daire, January typically has an average temperature of 6°C (43°F), with highs reaching up to 18°C (65°F) and lows dropping to around -5°C (23°F).

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

January Precipitation in Castro Daire

In Castro Daire in January, the precipitation amount is 84 mm (3.3 in) spread over 8 days.

January Precipitation Trends in Castro Daire

The chart displays monthly precipitation patterns in Castro Daire, 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 Castro Daire, January typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 8 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 Castro Daire

In Castro Daire in January, humidity is 87%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and necessitating warm, breathable layers for traveling.

January Average Humidity in Castro Daire

This chart illustrates the average monthly humidity levels in Castro Daire, 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 Castro Daire 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 Castro Daire

In Castro Daire 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 Castro Daire, you can check the information here.

Maximum UV Index Levels in Castro Daire for January

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

Data source: Castro Daire 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 Castro Daire Compares to Other Months

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

This table compares monthly weather conditions in Castro Daire, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	84 mm (3.3 inches)	87%	moderate
February Weather	8°C (47°F)	137 mm (5.4 inches)	81%	moderate
March Weather	10°C (49°F)	153 mm (6.0 inches)	78%	high
April Weather	12°C (53°F)	153 mm (6.0 inches)	79%	very high
May Weather	15°C (59°F)	76 mm (3.0 inches)	78%	very high
June Weather	17°C (63°F)	57 mm (2.3 inches)	71%	extreme
July Weather	20°C (68°F)	27 mm (1.1 inches)	63%	very high
August Weather	20°C (68°F)	22 mm (0.9 inches)	64%	very high
September Weather	18°C (65°F)	51 mm (2.0 inches)	71%	very high
October Weather	14°C (58°F)	108 mm (4.3 inches)	79%	high
November Weather	9°C (49°F)	151 mm (5.9 inches)	86%	moderate
December Weather	8°C (46°F)	182 mm (7.2 inches)	87%	low