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December Weather in San Julio, Mexico

Last updated: August 27, 2025

In San Julio, Mexico, the average temperature in December is a pleasant 16°C (60°F). However, temperatures can vary significantly, with minimums dipping to -1°C (30°F) and maximums soaring up to 31°C (89°F). Expect 10 mm (0.4 in) of precipitation spread over 2 days, while the average humidity sits at a notable 84%.

December Temperature in San Julio

In December in San Julio, the average temperature is 16°C (60°F), with maximums reaching 31°C (89°F) and minimums dropping as low as -1°C (30°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your travels.

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

The chart illustrates December temperature patterns in San Julio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Julio, December typically has an average temperature of 16°C (60°F), with highs reaching up to 31°C (89°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec596672798587858681766760
Data source: Temperature data for San Julio 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 Julio

In San Julio in December, the precipitation amount is 10 mm (0.4 in) over a period of 2 days.

December Precipitation Trends in San Julio

The chart displays monthly precipitation patterns in San Julio, 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 Julio, December typically receives around 10 mm (0.4 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec348241220153631610
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Julio

In San Julio in December humidity is 84%. With an average temperature of 16°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities feel muggy and potentially exhausting for travelers.

December Average Humidity in San Julio

This chart illustrates the average monthly humidity levels in San Julio, 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 Julio is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%62%53%48%52%64%73%71%82%83%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Julio

In San Julio in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in San Julio, you can refer to this Hourly UV Index in San Julio.

Maximum UV Index Levels in San Julio for December

The chart shows the monthly maximum UV Index (UVI) for San Julio 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 Julio typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710121414131313131186
Data source: San Julio 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 Julio Compares to Other Months

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

This table compares monthly weather conditions in San Julio, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather15°C (59°F)3 mm (0.1 inches)70%high
February Weather19°C (66°F)4 mm (0.2 inches)62%very high
March Weather22°C (73°F)8 mm (0.3 inches)53%extreme
April Weather26°C (79°F)2 mm (0.1 inches)48%extreme
May Weather29°C (85°F)4 mm (0.1 inches)52%extreme
June Weather30°C (87°F)12 mm (0.5 inches)64%extreme
July Weather30°C (85°F)20 mm (0.8 inches)73%extreme
August Weather30°C (86°F)15 mm (0.6 inches)71%extreme
September Weather27°C (81°F)36 mm (1.4 inches)82%extreme
October Weather24°C (76°F)31 mm (1.2 inches)83%extreme
November Weather19°C (67°F)6 mm (0.3 inches)82%very high
December Weather16°C (60°F)10 mm (0.4 inches)84%high

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