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December Weather in Cala Sur, Mexico

Last updated: August 27, 2025

In December, the average temperature in Cala Sur, Mexico hovers around 13°C (55°F). Expect to see a minimum drop to -2°C (29°F) and a warm peak at 24°C (76°F). With 40 mm (1.6 in) of precipitation spread across 8 days, don't forget your umbrella! The average humidity is quite high at 88%, adding to that cozy atmosphere.

December Temperature in Cala Sur

In December in Cala Sur, the average temperature is 13°C (55°F). The maximum can reach 24°C (76°F), while the minimum can drop as low as -2°C (29°F). Be prepared for a range of temperatures, making it essential to pack layers for your travels.

December Weather in Cala Sur: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Cala Sur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cala Sur, December typically has an average temperature of 13°C (55°F), with highs reaching up to 24°C (76°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec545760636564636363615755
Data source: Temperature data for Cala Sur 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 Cala Sur

In Cala Sur in December, the precipitation amount is 40 mm (1.6 in), occurring over a span of 8 days.

December Precipitation Trends in Cala Sur

The chart displays monthly precipitation patterns in Cala Sur, 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 Cala Sur, December typically receives around 40 mm (1.6 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec70507911315526424332236323110140
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Cala Sur

In Cala Sur in December humidity is 88%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring, as the moisture in the air can lead to a rather uncomfortable experience for traveling.

December Average Humidity in Cala Sur

This chart illustrates the average monthly humidity levels in Cala Sur, 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 Cala Sur is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%78%75%71%77%76%68%70%82%91%89%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Cala Sur

In Cala Sur in December, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Cala Sur.

Maximum UV Index Levels in Cala Sur for December

The chart shows the monthly maximum UV Index (UVI) for Cala Sur 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 Cala Sur typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121415151515141413109
Data source: Cala Sur 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 Cala Sur Compares to Other Months

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

This table compares monthly weather conditions in Cala Sur, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (54°F)70 mm (2.7 inches)84%very high
February Weather14°C (58°F)50 mm (2.0 inches)78%extreme
March Weather15°C (60°F)79 mm (3.1 inches)75%extreme
April Weather17°C (63°F)113 mm (4.5 inches)70%extreme
May Weather18°C (65°F)155 mm (6.1 inches)77%extreme
June Weather18°C (64°F)264 mm (10.4 inches)76%extreme
July Weather17°C (64°F)243 mm (9.6 inches)68%extreme
August Weather17°C (64°F)322 mm (12.7 inches)70%extreme
September Weather17°C (63°F)363 mm (14.3 inches)82%extreme
October Weather16°C (61°F)230 mm (9.1 inches)91%extreme
November Weather14°C (57°F)101 mm (4.0 inches)89%very high
December Weather13°C (55°F)40 mm (1.6 inches)88%very high

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