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December Weather in Adelanto, United States

Last updated: June 24, 2025

In December, the average temperature in Adelanto, United States hovers around 8°C (47°F), with a minimum dip to -5°C (23°F) and a maximum rise to 22°C (72°F). Expect 53 mm (2.1 in) of precipitation spread over 5 days, contributing to an average humidity level of 76%. Be prepared for a mix of cool and mild weather!

December Temperature in Adelanto

In December in Adelanto, the average temperature is 8°C (47°F). The maximum can reach 22°C (72°F) and the minimum can be as low as -5°C (23°F). Travelers should prepare for a wide range of temperatures and pack accordingly.

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

The chart illustrates December temperature patterns in Adelanto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Adelanto, December typically has an average temperature of 8°C (47°F), with highs reaching up to 22°C (72°F) and lows dropping to around -5°C (23°F).
JanFebMarAprMayJunJulAugSepOctNovDec474852606575818175645647
Data source: Temperature data for Adelanto 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 Adelanto

In Adelanto in December, the precipitation amount is 53 mm (2.1 in) during a span of 5 days.

December Precipitation Trends in Adelanto

The chart displays monthly precipitation patterns in Adelanto, 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 Adelanto, December typically receives around 53 mm (2.1 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec4446511910389351653
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Adelanto

In Adelanto in December, humidity is 76%. With an average temperature of 8°C (47°F), this humidity feels like traveling through a thick, damp blanket that clings to your skin, making every stroll feel heavier and more exhausting than it should.

December Average Humidity in Adelanto

This chart illustrates the average monthly humidity levels in Adelanto, 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 Adelanto is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%82%76%68%58%52%46%39%48%59%72%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Adelanto

In Adelanto 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 Adelanto for better planning.

Maximum UV Index Levels in Adelanto for December

The chart shows the monthly maximum UV Index (UVI) for Adelanto 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 Adelanto typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112121110754
Data source: Adelanto 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 Adelanto Compares to Other Months

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

This table compares monthly weather conditions in Adelanto, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)44 mm (1.7 inches)78%moderate
February Weather9°C (49°F)46 mm (1.8 inches)82%high
March Weather11°C (52°F)51 mm (2.0 inches)75%very high
April Weather16°C (60°F)19 mm (0.7 inches)68%very high
May Weather18°C (65°F)10 mm (0.4 inches)57%extreme
June Weather24°C (76°F)3 mm (0.1 inches)52%extreme
July Weather27°C (82°F)8 mm (0.3 inches)46%extreme
August Weather27°C (81°F)9 mm (0.4 inches)39%extreme
September Weather24°C (75°F)3 mm (0.1 inches)48%very high
October Weather18°C (65°F)5 mm (0.2 inches)59%high
November Weather13°C (56°F)16 mm (0.6 inches)72%moderate
December Weather8°C (47°F)53 mm (2.1 inches)76%moderate

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