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December Weather in San Javier, Mexico

Last updated: August 27, 2025

In December, the average temperature in San Javier, Mexico is a pleasant 18°C (65°F). Expect a chilly minimum of 3°C (38°F) and a warm maximum of 32°C (90°F). With an average humidity of 80%, the air might feel a bit damp. Be prepared for some light showers, as precipitation amounts can reach 20 mm (0.8 in) over the course of 3 days.

December Temperature in San Javier

In December in San Javier, the average temperature is 18°C (65°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as 3°C (38°F). Be prepared for a range of weather conditions when traveling during this time.

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

The chart illustrates December temperature patterns in San Javier, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Javier, December typically has an average temperature of 18°C (65°F), with highs reaching up to 32°C (90°F) and lows dropping to around 3°C (38°F).
JanFebMarAprMayJunJulAugSepOctNovDec636570768186838382807264
Data source: Temperature data for San Javier 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 Javier

In San Javier in December, the precipitation amount is 20 mm (0.8 in) accumulated over a period of 3 days.

December Precipitation Trends in San Javier

The chart displays monthly precipitation patterns in San Javier, 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 Javier, December typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec182913113311911087244320
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Javier

In San Javier in December, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

December Average Humidity in San Javier

This chart illustrates the average monthly humidity levels in San Javier, 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 Javier is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%67%60%51%47%50%70%82%82%78%78%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Javier

In San Javier 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 Javier, you can refer to this Hourly UV Index in San Javier.

Maximum UV Index Levels in San Javier for December

The chart shows the monthly maximum UV Index (UVI) for San Javier 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 Javier typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69101313121212121076
Data source: San Javier 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 Javier Compares to Other Months

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

This table compares monthly weather conditions in San Javier, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)18 mm (0.7 inches)74%high
February Weather18°C (65°F)29 mm (1.1 inches)67%very high
March Weather21°C (70°F)13 mm (0.5 inches)60%very high
April Weather24°C (76°F)1 mm (0.0 inches)51%extreme
May Weather27°C (81°F)1 mm (0.0 inches)47%extreme
June Weather30°C (86°F)33 mm (1.3 inches)50%extreme
July Weather28°C (83°F)119 mm (4.7 inches)70%extreme
August Weather28°C (83°F)110 mm (4.3 inches)81%extreme
September Weather28°C (82°F)87 mm (3.4 inches)82%extreme
October Weather27°C (80°F)23 mm (0.9 inches)78%very high
November Weather22°C (72°F)43 mm (1.7 inches)78%high
December Weather18°C (65°F)20 mm (0.8 inches)80%high

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