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December Weather in San Agustin, Mexico

Last updated: August 27, 2025

In San Agustin, Mexico, the average temperature in December hovers around 9°C (48°F), with a minimum that can dip to -5°C (23°F) and a maximum reaching 25°C (77°F). Expect 17 mm (0.7 in) of precipitation over approximately 3 days, and enjoy the modest 87% humidity typical of this season.

December Temperature in San Agustin

In December in San Agustin, the average temperature is 9°C (48°F), with maximums reaching 25°C (77°F) and minimums dropping as low as -5°C (23°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack layers for both warm days and cooler nights.

December Weather in San Agustin: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Agustin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Agustin, December typically has an average temperature of 9°C (48°F), with highs reaching up to 25°C (77°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec465260697785848478685748
Data source: Temperature data for San Agustin 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 San Agustin

In San Agustin in December, the precipitation amount is 17 mm (0.7 in) over the course of 3 days.

December Precipitation Trends in San Agustin

The chart displays monthly precipitation patterns in San Agustin, 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 San Agustin, December typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec1211184318272824211218
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Agustin

In San Agustin in December humidity is 87%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration uncomfortable and requiring extra layers and careful planning for any activities.

December Average Humidity in San Agustin

This chart illustrates the average monthly humidity levels in San Agustin, 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 San Agustin is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%77%65%53%51%51%60%63%74%75%83%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Agustin

In San Agustin in December, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in San Agustin.

Maximum UV Index Levels in San Agustin for December

The chart shows the monthly maximum UV Index (UVI) for San Agustin 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 San Agustin typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5810121313131211965
Data source: San Agustin 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 San Agustin Compares to Other Months

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

This table compares monthly weather conditions in San Agustin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (46°F)12 mm (0.5 inches)81%moderate
February Weather11°C (52°F)11 mm (0.4 inches)77%very high
March Weather16°C (60°F)18 mm (0.7 inches)65%very high
April Weather21°C (69°F)4 mm (0.2 inches)53%extreme
May Weather25°C (77°F)3 mm (0.1 inches)51%extreme
June Weather29°C (85°F)18 mm (0.7 inches)51%extreme
July Weather29°C (85°F)27 mm (1.0 inches)60%extreme
August Weather29°C (84°F)28 mm (1.1 inches)63%extreme
September Weather25°C (78°F)24 mm (1.0 inches)74%extreme
October Weather20°C (68°F)21 mm (0.8 inches)75%very high
November Weather14°C (57°F)12 mm (0.5 inches)82%high
December Weather9°C (48°F)17 mm (0.7 inches)87%moderate

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