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December Weather in Mountainair, United States

Last updated: June 24, 2025

In December, the average temperature in Mountainair, United States hovers around 2°C (36°F). Temperatures can swing dramatically, dipping as low as -19°C (-1°F) and peaking at a pleasant 17°C (64°F). Expect 15 mm (0.6 in) of precipitation over the course of 3 days, accompanied by an average humidity of 79%.

December Temperature in Mountainair

In December in Mountainair, the average temperature is 2°C (36°F), with maximums occasionally reaching 17°C (64°F) and minimums plunging as low as -19°C (-1°F). This temperature range suggests packing layers to ensure comfort during your travels.

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

The chart illustrates December temperature patterns in Mountainair, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mountainair, December typically has an average temperature of 2°C (36°F), with highs reaching up to 17°C (64°F) and lows dropping to around -19°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec343746546473737266554536
Data source: Temperature data for Mountainair 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 Mountainair

In Mountainair in December, the precipitation amount is 15 mm (0.6 in) over the course of 3 days.

December Precipitation Trends in Mountainair

The chart displays monthly precipitation patterns in Mountainair, 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 Mountainair, December typically receives around 15 mm (0.6 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec212823231426634040371815
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Mountainair

In Mountainair in December, humidity is 79%. With an average temperature of 2°C (36°F), this humidity feels like a damp chill that seeps into your bones, making traveling quite uncomfortable as the cold air clings to your skin and every breath feels heavy and frosty.

December Average Humidity in Mountainair

This chart illustrates the average monthly humidity levels in Mountainair, 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 Mountainair 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 Mountainair

In Mountainair 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 Mountainair for better planning.

Maximum UV Index Levels in Mountainair for December

The chart shows the monthly maximum UV Index (UVI) for Mountainair 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 Mountainair typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec5710111213131211864
Data source: Mountainair 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 Mountainair Compares to Other Months

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

This table compares monthly weather conditions in Mountainair, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)21 mm (0.8 inches)78%moderate
February Weather3°C (37°F)27 mm (1.1 inches)79%high
March Weather8°C (47°F)23 mm (0.9 inches)66%very high
April Weather12°C (55°F)23 mm (0.9 inches)60%extreme
May Weather18°C (64°F)14 mm (0.6 inches)57%extreme
June Weather23°C (73°F)26 mm (1.0 inches)55%extreme
July Weather23°C (74°F)63 mm (2.5 inches)56%extreme
August Weather22°C (72°F)40 mm (1.6 inches)65%extreme
September Weather19°C (67°F)40 mm (1.6 inches)72%extreme
October Weather13°C (55°F)37 mm (1.5 inches)78%very high
November Weather7°C (45°F)18 mm (0.7 inches)81%high
December Weather2°C (36°F)15 mm (0.6 inches)79%moderate

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