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December Weather in La Mesa, Mexico

Last updated: August 27, 2025

In La Mesa, Mexico, the average temperature for December hovers around 11°C (52°F). Expect a minimum of -6°C (21°F) and a maximum of 28°C (82°F). During this period, average precipitation measures 15 mm (0.6 in), typically falling over 1 day. With an average humidity of 84%, the atmosphere is noticeably damp, contributing to a unique seasonal experience.

December Temperature in La Mesa

In December in La Mesa, the average temperature is 11°C (52°F), with maximums reaching up to 28°C (82°F) and minimums dropping as low as -6°C (21°F). It’s essential to pack for a range of weather conditions when traveling during this month.

December Weather in La Mesa: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in La Mesa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Mesa, December typically has an average temperature of 11°C (52°F), with highs reaching up to 28°C (82°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec515764717884818074696052
Data source: Temperature data for La Mesa 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 La Mesa

In La Mesa in December, the precipitation amount is 15 mm (0.6 in) over the course of 1 day.

December Precipitation Trends in La Mesa

The chart displays monthly precipitation patterns in La Mesa, 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 La Mesa, December typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 1 days.
JanFebMarAprMayJunJulAugSepOctNovDec6633624504164241415
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in La Mesa

In La Mesa in December, humidity is 84%. With an average temperature of 11°C (52°F), this humidity feels like a heavy blanket, making it uncomfortable for traveling as the dampness clings to your skin and can leave you feeling sluggish and fatigued.

December Average Humidity in La Mesa

This chart illustrates the average monthly humidity levels in La Mesa, 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 La Mesa is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%71%60%52%49%50%65%70%79%77%83%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in La Mesa

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

Maximum UV Index Levels in La Mesa for December

The chart shows the monthly maximum UV Index (UVI) for La Mesa 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 La Mesa typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec69111313131313121086
Data source: La Mesa 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 La Mesa Compares to Other Months

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

This table compares monthly weather conditions in La Mesa, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather11°C (51°F)6 mm (0.2 inches)78%high
February Weather14°C (57°F)6 mm (0.2 inches)71%very high
March Weather18°C (64°F)3 mm (0.1 inches)60%extreme
April Weather22°C (72°F)3 mm (0.1 inches)52%extreme
May Weather26°C (79°F)6 mm (0.2 inches)49%extreme
June Weather29°C (84°F)24 mm (0.9 inches)50%extreme
July Weather27°C (81°F)50 mm (2.0 inches)65%extreme
August Weather27°C (80°F)41 mm (1.6 inches)70%extreme
September Weather24°C (75°F)64 mm (2.5 inches)79%extreme
October Weather20°C (69°F)24 mm (1.0 inches)77%very high
November Weather16°C (60°F)14 mm (0.5 inches)83%very high
December Weather11°C (52°F)15 mm (0.6 inches)84%high

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