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December Weather in El Custodio, Mexico

Last updated: August 27, 2025

In December, the average temperature in El Custodio, Mexico is a mild 16°C (61°F). However, be prepared for a range of conditions, with minimum temperatures dipping to -1°C (31°F) and maximums soaring up to 33°C (91°F). Expect some moisture in the air as well, with around 12 mm (0.5 in) of precipitation spread across 3 days, accompanied by an average humidity of 87%.

December Temperature in El Custodio

In December in El Custodio, the average temperature is 16°C (61°F), with maximums reaching 33°C (91°F) and minimums dropping as low as -1°C (31°F). This diverse temperature range makes El Custodio an intriguing destination for travelers seeking both warm days and cooler nights.

December Weather in El Custodio: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in El Custodio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In El Custodio, December typically has an average temperature of 16°C (61°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec596468737776757573706460
Data source: Temperature data for El Custodio 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 El Custodio

In El Custodio in December, the precipitation amount is 12 mm (0.5 in) during a span of 3 days.

December Precipitation Trends in El Custodio

The chart displays monthly precipitation patterns in El Custodio, 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 El Custodio, December typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec141519225175845194612012
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in El Custodio

In El Custodio in December humidity is 87%. With an average temperature of 16°C (61°F), this humidity feels like a heavy blanket wrapping around you, making outdoor exploration sticky and uncomfortable, while also adding a thickness to the air that can sap your energy and enthusiasm for sightseeing.

December Average Humidity in El Custodio

This chart illustrates the average monthly humidity levels in El Custodio, 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 El Custodio is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%69%65%64%75%78%67%64%82%86%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in El Custodio

In El Custodio in December, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in El Custodio.

Maximum UV Index Levels in El Custodio for December

The chart shows the monthly maximum UV Index (UVI) for El Custodio 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 El Custodio typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec810131314131413131297
Data source: El Custodio 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 El Custodio Compares to Other Months

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

This table compares monthly weather conditions in El Custodio, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (59°F)14 mm (0.6 inches)75%very high
February Weather18°C (64°F)15 mm (0.6 inches)69%very high
March Weather20°C (69°F)19 mm (0.8 inches)65%extreme
April Weather23°C (74°F)22 mm (0.9 inches)64%extreme
May Weather25°C (77°F)51 mm (2.0 inches)75%extreme
June Weather24°C (76°F)74 mm (2.9 inches)78%extreme
July Weather24°C (75°F)84 mm (3.3 inches)67%extreme
August Weather24°C (76°F)51 mm (2.0 inches)64%extreme
September Weather23°C (74°F)94 mm (3.7 inches)81%extreme
October Weather21°C (70°F)61 mm (2.4 inches)85%extreme
November Weather18°C (65°F)20 mm (0.8 inches)87%very high
December Weather16°C (61°F)12 mm (0.5 inches)87%high

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