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December Weather in Los Alamos, United States

Last updated: June 24, 2025

In December, the average temperature in Los Alamos, United States hovers around -1°C (30°F), with extremes ranging from a chilly -23°C (-9°F) to a mild 17°C (62°F). Expect a modest precipitation amount of 23 mm (0.9 in) over about 4 days, accompanied by an average humidity level of 79%. Prepare accordingly, as this mix of cold, occasional rain, and high humidity can create unique weather conditions!

December Temperature in Los Alamos

In December in Los Alamos, the average temperature is -1°C (30°F), with maximums reaching 17°C (62°F) and minimums dropping as low as -23°C (-9°F). This range makes Los Alamos a destination where travelers should be prepared for both chilly and mild weather.

December Weather in Los Alamos: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Los Alamos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Alamos, December typically has an average temperature of -1°C (30°F), with highs reaching up to 17°C (62°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec273040485767706762493930
Data source: Temperature data for Los Alamos 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 Los Alamos

In Los Alamos in December, the total precipitation amount is 23 mm (0.9 in) over a span of 4 days.

December Precipitation Trends in Los Alamos

The chart displays monthly precipitation patterns in Los Alamos, 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 Los Alamos, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec313139303032766651573224
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Los Alamos

In Los Alamos in December, humidity is 79%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill in the air, making outdoor activities uncomfortable and requiring extra layers to stay warm while exploring.

December Average Humidity in Los Alamos

This chart illustrates the average monthly humidity levels in Los Alamos, 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 Los Alamos is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%79%66%60%57%55%57%65%72%78%81%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Los Alamos

In Los Alamos in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Los Alamos for better planning.

Maximum UV Index Levels in Los Alamos for December

The chart shows the monthly maximum UV Index (UVI) for Los Alamos 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 Los Alamos typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5810111213131211864
Data source: Los Alamos 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 Los Alamos Compares to Other Months

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

This table compares monthly weather conditions in Los Alamos, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (28°F)30 mm (1.2 inches)78%moderate
February Weather-1°C (30°F)31 mm (1.2 inches)79%very high
March Weather4°C (40°F)39 mm (1.5 inches)66%very high
April Weather9°C (49°F)30 mm (1.2 inches)60%extreme
May Weather14°C (58°F)30 mm (1.2 inches)57%extreme
June Weather20°C (67°F)32 mm (1.3 inches)55%extreme
July Weather21°C (70°F)76 mm (3.0 inches)56%extreme
August Weather20°C (68°F)65 mm (2.6 inches)65%extreme
September Weather17°C (62°F)51 mm (2.0 inches)72%extreme
October Weather10°C (50°F)57 mm (2.2 inches)78%very high
November Weather4°C (39°F)32 mm (1.3 inches)81%high
December Weather-1°C (30°F)23 mm (0.9 inches)79%moderate

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