January Weather in Castelnou, Spain

Last updated: August 27, 2025

In January, the average temperature in Castelnou, Spain hovers around 7°C (46°F), with extremes ranging from a chilly -4°C (24°F) to a pleasant 22°C (72°F). Precipitation is expected at about 38 mm (1.5 in) over 5 days, while the air feels consistently humid at 85%.

January Temperature in Castelnou

In January in Castelnou, the average temperature is 7°C (46°F). The maximum can reach 22°C (72°F), and the minimum can be as low as -4°C (24°F). This range offers a unique climate that requires visitors to pack accordingly for both warm and cool conditions while exploring the area.

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

The chart illustrates January temperature patterns in Castelnou, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castelnou, January typically has an average temperature of 7°C (46°F), with highs reaching up to 22°C (72°F) and lows dropping to around -4°C (24°F).

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

January Precipitation in Castelnou

In Castelnou in January, the total precipitation amount is 38 mm (1.5 in) spread over a duration of 5 days.

January Precipitation Trends in Castelnou

The chart displays monthly precipitation patterns in Castelnou, 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 Castelnou, January typically receives around 38 mm (1.5 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 Castelnou

In Castelnou in January humidity is 85%. With an average temperature of 7°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much colder than it actually is.

January Average Humidity in Castelnou

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

In Castelnou 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 Castelnou, you can check the information here.

Maximum UV Index Levels in Castelnou for January

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

Data source: Castelnou 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 Castelnou Compares to Other Months

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

This table compares monthly weather conditions in Castelnou, 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 (46°F)	38 mm (1.5 inches)	85%	moderate
February Weather	11°C (51°F)	16 mm (0.6 inches)	80%	moderate
March Weather	12°C (55°F)	29 mm (1.1 inches)	73%	high
April Weather	15°C (59°F)	60 mm (2.4 inches)	69%	very high
May Weather	20°C (68°F)	34 mm (1.3 inches)	64%	very high
June Weather	24°C (76°F)	28 mm (1.1 inches)	59%	extreme
July Weather	27°C (81°F)	12 mm (0.5 inches)	58%	extreme
August Weather	27°C (81°F)	13 mm (0.5 inches)	58%	very high
September Weather	22°C (73°F)	21 mm (0.8 inches)	64%	very high
October Weather	17°C (63°F)	36 mm (1.4 inches)	76%	high
November Weather	11°C (53°F)	50 mm (2.0 inches)	82%	moderate
December Weather	9°C (49°F)	25 mm (1.0 inches)	84%	low