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December Weather in Amarillo, United States

Last updated: June 24, 2025

In Amarillo, United States, the average temperature in December hovers around 5°C (41°F), with a minimum of -11°C (13°F) and a maximum reaching up to 25°C (78°F). During this time, expect about 14 mm (0.5 in) of precipitation over 2 days, and an average humidity level of 81%. 🌧️

December Temperature in Amarillo

In December in Amarillo, the average temperature is 5°C (41°F). Maximum temperatures can reach 25°C (78°F), while the minimum can drop as low as -11°C (13°F). Travelers should be prepared for a wide range of weather, necessitating layers and versatile clothing options.

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

The chart illustrates December temperature patterns in Amarillo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Amarillo, December typically has an average temperature of 5°C (41°F), with highs reaching up to 25°C (78°F) and lows dropping to around -11°C (13°F).
JanFebMarAprMayJunJulAugSepOctNovDec383950576777807872584841
Data source: Temperature data for Amarillo 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 Amarillo

In Amarillo in December, the precipitation amount reaches 14 mm (0.5 in) over a span of 2 days.

December Precipitation Trends in Amarillo

The chart displays monthly precipitation patterns in Amarillo, 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 Amarillo, December typically receives around 14 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec221039296942394837551414
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Amarillo

In Amarillo in December, humidity is 81%. With an average temperature of 5°C (41°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor exploration uncomfortable and requiring warm, waterproof clothing to stay comfortable while traveling.

December Average Humidity in Amarillo

This chart illustrates the average monthly humidity levels in Amarillo, 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 Amarillo is approximately 81%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%76%64%70%78%81%82%78%72%73%81%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Amarillo

In Amarillo 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 Amarillo for better planning.

Maximum UV Index Levels in Amarillo for December

The chart shows the monthly maximum UV Index (UVI) for Amarillo 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 Amarillo typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec468111112121110764
Data source: Amarillo 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 Amarillo Compares to Other Months

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

This table compares monthly weather conditions in Amarillo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (38°F)22 mm (0.9 inches)75%moderate
February Weather4°C (40°F)10 mm (0.4 inches)76%high
March Weather10°C (51°F)39 mm (1.5 inches)64%very high
April Weather14°C (57°F)29 mm (1.1 inches)70%extreme
May Weather20°C (68°F)69 mm (2.7 inches)78%extreme
June Weather25°C (77°F)42 mm (1.6 inches)81%extreme
July Weather27°C (80°F)39 mm (1.5 inches)82%extreme
August Weather26°C (78°F)48 mm (1.9 inches)78%extreme
September Weather22°C (72°F)37 mm (1.5 inches)72%very high
October Weather14°C (58°F)55 mm (2.2 inches)73%high
November Weather9°C (48°F)13 mm (0.5 inches)80%high
December Weather5°C (41°F)14 mm (0.5 inches)81%moderate

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