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December Weather in Casas, Mexico

Last updated: August 27, 2025

In Casas, Mexico, the average temperature in December is a pleasant 19°C (67°F). However, be prepared for a temperature range that can drop to a chilly 1°C (34°F) and peak at a balmy 35°C (96°F). Expect a total of 12 mm (0.5 in) of precipitation over 2 days, contributing to the overall average humidity of a notably high 89%.

December Temperature in Casas

In December in Casas, the average temperature is 19°C (67°F), with maximums reaching 35°C (96°F) and minimums dropping as low as 1°C (34°F). This varied climate makes Casas a versatile destination for travelers, offering opportunities for both warm-weather activities and cooler explorations.

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

The chart illustrates December temperature patterns in Casas, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casas, December typically has an average temperature of 19°C (67°F), with highs reaching up to 35°C (96°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec656974798485858682777066
Data source: Temperature data for Casas 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 Casas

In Casas in December, the precipitation amount is 12 mm (0.5 in) over the course of 2 days.

December Precipitation Trends in Casas

The chart displays monthly precipitation patterns in Casas, 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 Casas, December typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec18133235631039545136863212
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Casas

In Casas in December, humidity is 89%. With an average temperature of 19°C (67°F), this humidity feels like a warm, muggy blanket enveloping you, making outdoor activities uncomfortable and encouraging travelers to seek shaded areas or indoor attractions during the hottest parts of the day.

December Average Humidity in Casas

This chart illustrates the average monthly humidity levels in Casas, 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 Casas is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%83%84%85%79%71%72%80%85%88%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Casas

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

Maximum UV Index Levels in Casas for December

The chart shows the monthly maximum UV Index (UVI) for Casas 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 Casas typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec79111212121312121086
Data source: Casas 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 Casas Compares to Other Months

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

This table compares monthly weather conditions in Casas, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather18°C (65°F)18 mm (0.7 inches)87%high
February Weather20°C (69°F)13 mm (0.5 inches)85%very high
March Weather23°C (75°F)32 mm (1.3 inches)83%extreme
April Weather26°C (80°F)35 mm (1.4 inches)84%extreme
May Weather29°C (84°F)63 mm (2.5 inches)85%extreme
June Weather29°C (85°F)103 mm (4.0 inches)79%extreme
July Weather29°C (85°F)95 mm (3.8 inches)71%extreme
August Weather30°C (86°F)45 mm (1.8 inches)72%extreme
September Weather28°C (82°F)136 mm (5.3 inches)80%extreme
October Weather25°C (77°F)86 mm (3.4 inches)85%very high
November Weather21°C (70°F)32 mm (1.2 inches)88%very high
December Weather19°C (67°F)12 mm (0.5 inches)89%high

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