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December Weather in Sant Joan, Spain

Last updated: August 27, 2025

In December, the average temperature in Sant Joan, Spain hovers around 13°C (56°F), with a minimum of 4°C (39°F) and a maximum reaching up to 21°C (70°F). Expect 33 mm (1.3 in) of precipitation over approximately 6 days, with humidity levels averaging around 73%.

December Temperature in Sant Joan

In December in Sant Joan, the average temperature is 13°C (56°F). Maximums can reach 21°C (70°F), while minimums can be as low as 4°C (39°F). Overall, it's a great time to explore Sant Joan with mild temperatures and a mix of cool and warm days.

December Weather in Sant Joan: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sant Joan, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sant Joan, December typically has an average temperature of 13°C (56°F), with highs reaching up to 21°C (70°F) and lows dropping to around 4°C (39°F).
JanFebMarAprMayJunJulAugSepOctNovDec535457606775808176686056
Data source: Temperature data for Sant Joan 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.

December Precipitation in Sant Joan

In Sant Joan, in December, the precipitation amount is 33 mm (1.3 in) over the course of 6 days.

December Precipitation Trends in Sant Joan

The chart displays monthly precipitation patterns in Sant Joan, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Sant Joan, December typically receives around 33 mm (1.3 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec43293342312151559616633
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sant Joan

In Sant Joan in December humidity is 73%. With an average temperature of 13°C (56°F), this humidity feels like a cool, damp embrace that can be quite refreshing yet may require a light jacket for comfort while exploring the outdoors.

December Average Humidity in Sant Joan

This chart illustrates the average monthly humidity levels in Sant Joan, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Sant Joan is approximately 73%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%73%76%79%79%82%84%81%77%78%73%73%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sant Joan

In Sant Joan in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Sant Joan, you can visit Hourly UV Index in Sant Joan.

Maximum UV Index Levels in Sant Joan for December

The chart shows the monthly maximum UV Index (UVI) for Sant Joan in December, 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 December, the maximum UV index in Sant Joan typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec34689101098642
Data source: Sant Joan December 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 December Weather in Sant Joan Compares to Other Months

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

This table compares monthly weather conditions in Sant Joan, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (53°F)43 mm (1.7 inches)76%moderate
February Weather12°C (55°F)29 mm (1.1 inches)73%moderate
March Weather14°C (57°F)33 mm (1.3 inches)76%high
April Weather16°C (60°F)42 mm (1.6 inches)79%very high
May Weather19°C (67°F)30 mm (1.2 inches)79%very high
June Weather24°C (75°F)21 mm (0.8 inches)82%very high
July Weather27°C (80°F)5 mm (0.2 inches)84%very high
August Weather27°C (81°F)15 mm (0.6 inches)81%very high
September Weather24°C (76°F)59 mm (2.3 inches)77%very high
October Weather20°C (68°F)61 mm (2.4 inches)78%high
November Weather16°C (60°F)66 mm (2.6 inches)73%moderate
December Weather13°C (56°F)33 mm (1.3 inches)73%low

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