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January Weather in Arenas de San Juan, Spain

Last updated: August 27, 2025

In January, the average temperature in Arenas de San Juan, Spain hovers around 5°C (42°F), with the mercury dipping as low as -9°C (17°F) and peaking at 18°C (65°F). Expect about 30 mm (1.2 in) of precipitation spread over 5 days, complemented by a notably high average humidity of 85%.

January Temperature in Arenas de San Juan

In January in Arenas de San Juan, the average temperature is 5°C (42°F), with a maximum that can reach 18°C (65°F) and a minimum that can drop to -9°C (17°F). Be prepared for a wide range of temperatures, making layered clothing essential for your travels.

January Weather in Arenas de San Juan: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Arenas de San Juan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Arenas de San Juan, January typically has an average temperature of 5°C (42°F), with highs reaching up to 18°C (65°F) and lows dropping to around -9°C (17°F).
JanFebMarAprMayJunJulAugSepOctNovDec414851566675828172625045
Data source: Temperature data for Arenas de San Juan generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

January Precipitation in Arenas de San Juan

In Arenas de San Juan in January, the precipitation amount is 30 mm (1.2 in) over the course of 5 days.

January Precipitation Trends in Arenas de San Juan

The chart displays monthly precipitation patterns in Arenas de San Juan, 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 Arenas de San Juan, January typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec302546632812101322445036
Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.
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January Humidity in Arenas de San Juan

In Arenas de San Juan in January, humidity is 85%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that clings to your skin, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

January Average Humidity in Arenas de San Juan

This chart illustrates the average monthly humidity levels in Arenas de San Juan, 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 Arenas de San Juan is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%78%66%60%56%44%44%42%53%70%83%86%
Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Arenas de San Juan

In Arenas de San Juan 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 Arenas de San Juan, you can check the information here.

Maximum UV Index Levels in Arenas de San Juan for January

The chart shows the monthly maximum UV Index (UVI) for Arenas de San Juan 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 Arenas de San Juan typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3469101211109743
Data source: Arenas de San Juan 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 Arenas de San Juan Compares to Other Months

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

This table compares monthly weather conditions in Arenas de San Juan, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)30 mm (1.2 inches)85%moderate
February Weather9°C (48°F)25 mm (1.0 inches)78%moderate
March Weather11°C (51°F)46 mm (1.8 inches)66%high
April Weather13°C (56°F)63 mm (2.5 inches)60%very high
May Weather19°C (67°F)28 mm (1.1 inches)56%very high
June Weather24°C (76°F)12 mm (0.5 inches)44%extreme
July Weather28°C (82°F)10 mm (0.4 inches)44%extreme
August Weather27°C (82°F)13 mm (0.5 inches)42%very high
September Weather22°C (72°F)22 mm (0.9 inches)53%very high
October Weather17°C (62°F)44 mm (1.7 inches)70%high
November Weather10°C (50°F)50 mm (2.0 inches)83%moderate
December Weather7°C (45°F)36 mm (1.4 inches)86%moderate

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