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December Weather in Las Cruces, Mexico

Last updated: August 27, 2025

In Las Cruces, Mexico, the average temperature in December is a pleasant 20°C (68°F), with lows dipping to 6°C (44°F) and highs reaching up to 33°C (92°F). Expect a bit of moisture, with 21 mm (0.8 in) of precipitation spread over 5 days. The atmosphere feels quite humid, boasting an average humidity of 91%.

December Temperature in Las Cruces

In December in Las Cruces, the average temperature is 20°C (68°F). Maximum temperatures can reach 33°C (92°F), while minimums can drop as low as 6°C (44°F). Be prepared for a pleasant mix of warm days and cooler evenings, making it an ideal time for outdoor activities and exploration.

December Weather in Las Cruces: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Las Cruces, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Las Cruces, December typically has an average temperature of 20°C (68°F), with highs reaching up to 33°C (92°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec666974798383828381777268
Data source: Temperature data for Las Cruces 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 Las Cruces

In Las Cruces in December, the precipitation amount is 21 mm (0.8 in) spread over a period of 5 days.

December Precipitation Trends in Las Cruces

The chart displays monthly precipitation patterns in Las Cruces, 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 Las Cruces, December typically receives around 21 mm (0.8 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec562634551301921531592122436421
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Las Cruces

In Las Cruces in December, humidity is 91%. With an average temperature of 20°C (68°F), this humidity feels like a heavy blanket wrapping around you, making travel feel stifling and often exhausting, as each step you take requires more effort in the thick, muggy air.

December Average Humidity in Las Cruces

This chart illustrates the average monthly humidity levels in Las Cruces, 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 Las Cruces is approximately 91%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Las Cruces

In Las Cruces in December, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Las Cruces.

Maximum UV Index Levels in Las Cruces for December

The chart shows the monthly maximum UV Index (UVI) for Las Cruces 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 Las Cruces typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710121213131312121187
Data source: Las Cruces 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 Las Cruces Compares to Other Months

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

This table compares monthly weather conditions in Las Cruces, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (67°F)56 mm (2.2 inches)88%high
February Weather21°C (70°F)25 mm (1.0 inches)86%very high
March Weather23°C (74°F)34 mm (1.4 inches)83%extreme
April Weather26°C (79°F)55 mm (2.2 inches)80%extreme
May Weather28°C (84°F)130 mm (5.1 inches)82%extreme
June Weather28°C (83°F)192 mm (7.6 inches)79%extreme
July Weather28°C (83°F)153 mm (6.0 inches)72%extreme
August Weather28°C (83°F)158 mm (6.2 inches)74%extreme
September Weather27°C (81°F)212 mm (8.4 inches)84%extreme
October Weather25°C (78°F)243 mm (9.6 inches)92%extreme
November Weather22°C (72°F)64 mm (2.5 inches)91%very high
December Weather20°C (68°F)21 mm (0.8 inches)91%high

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