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December Weather in Siltepec, Mexico

Last updated: August 27, 2025

In December, the average temperature in Siltepec, Mexico hovers around 18°C (64°F). Expect a comfortable range where the minimum can drop to 8°C (46°F) and the maximum could reach up to 26°C (80°F). The region experiences 20 mm (0.8 in) of precipitation over about 5 days, accompanied by an average humidity level of 76%. Stay prepared for a mix of warm and cool days!

December Temperature in Siltepec

In December in Siltepec, the average temperature is 18°C (64°F). Maximum temperatures can reach 26°C (80°F), while minimums can drop as low as 8°C (46°F). This makes it a perfect time for travelers to enjoy mild weather and explore the outdoors comfortably.

December Weather in Siltepec: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Siltepec, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siltepec, December typically has an average temperature of 18°C (64°F), with highs reaching up to 26°C (80°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec636567696967676767666564
Data source: Temperature data for Siltepec 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 Siltepec

In Siltepec in December, the precipitation amount is 20 mm (0.8 in) over a period of 5 days.

December Precipitation Trends in Siltepec

The chart displays monthly precipitation patterns in Siltepec, 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 Siltepec, December typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec171826712664601993173792766020
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Siltepec

In Siltepec in December, humidity is 76%. With an average temperature of 18°C (64°F), this humidity feels like a warm blanket wrapping around you, making outdoor activities feel steamy and invigorating—perfect for exploring charming streets, though you might want to take breaks in the shade.

December Average Humidity in Siltepec

This chart illustrates the average monthly humidity levels in Siltepec, 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 Siltepec is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%68%59%57%65%66%75%82%82%83%80%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Siltepec

In Siltepec 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 Siltepec.

Maximum UV Index Levels in Siltepec for December

The chart shows the monthly maximum UV Index (UVI) for Siltepec 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 Siltepec typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11131415141415141413119
Data source: Siltepec 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 Siltepec Compares to Other Months

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

This table compares monthly weather conditions in Siltepec, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (63°F)17 mm (0.7 inches)76%extreme
February Weather18°C (65°F)18 mm (0.7 inches)68%extreme
March Weather19°C (67°F)26 mm (1.0 inches)59%extreme
April Weather21°C (69°F)71 mm (2.8 inches)57%extreme
May Weather21°C (70°F)265 mm (10.5 inches)65%extreme
June Weather20°C (68°F)460 mm (18.1 inches)66%extreme
July Weather20°C (67°F)199 mm (7.8 inches)75%extreme
August Weather20°C (67°F)317 mm (12.5 inches)82%extreme
September Weather19°C (67°F)379 mm (14.9 inches)82%extreme
October Weather19°C (67°F)276 mm (10.9 inches)83%extreme
November Weather18°C (65°F)60 mm (2.4 inches)80%extreme
December Weather18°C (64°F)20 mm (0.8 inches)76%very high

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