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December Weather in Boron, United States

Last updated: June 24, 2025

In Boron, United States, the average temperature in December hovers around 8°C (48°F), with a minimum drop to -3°C (27°F) and a maximum peak at 24°C (75°F). Expect a modest precipitation of 29 mm (1.1 in) spread over 3 days, alongside a relatively high average humidity of 76%. Prepare for a mix of chilly days and occasional warmth!

December Temperature in Boron

In December in Boron, the average temperature is 8°C (48°F). Maxima can reach 24°C (75°F) and minima can drop to as low as -3°C (27°F). It's advisable to pack layers and be prepared for varying weather conditions during your travels.

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

The chart illustrates December temperature patterns in Boron, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Boron, December typically has an average temperature of 8°C (48°F), with highs reaching up to 24°C (75°F) and lows dropping to around -3°C (27°F).
JanFebMarAprMayJunJulAugSepOctNovDec495156647081888679665647
Data source: Temperature data for Boron 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 Boron

In Boron in December, the precipitation amount is 29 mm (1.1 in) over the course of 3 days.

December Precipitation Trends in Boron

The chart displays monthly precipitation patterns in Boron, 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 Boron, December typically receives around 29 mm (1.1 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec30192411401002929
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Boron

In Boron in December humidity is 76%. With an average temperature of 8°C (48°F), this humidity feels like a chilly embrace that makes your skin damp and your breath visible, creating an environment that can be quite uncomfortable for traveling unless you're dressed in layers and prepared for the moisture in the air.

December Average Humidity in Boron

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

In Boron 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 Boron for better planning.

Maximum UV Index Levels in Boron for December

The chart shows the monthly maximum UV Index (UVI) for Boron 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 Boron typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469101112121110854
Data source: Boron 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 Boron Compares to Other Months

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

This table compares monthly weather conditions in Boron, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)29 mm (1.2 inches)78%moderate
February Weather11°C (51°F)19 mm (0.7 inches)82%high
March Weather13°C (57°F)23 mm (0.9 inches)75%very high
April Weather18°C (65°F)11 mm (0.4 inches)68%very high
May Weather21°C (71°F)4 mm (0.2 inches)57%extreme
June Weather27°C (81°F)0 mm (0.0 inches)52%extreme
July Weather31°C (88°F)1 mm (0.0 inches)46%extreme
August Weather30°C (87°F)0 mm (0.0 inches)39%extreme
September Weather26°C (79°F)0 mm (0.0 inches)48%very high
October Weather19°C (66°F)2 mm (0.1 inches)59%very high
November Weather13°C (57°F)9 mm (0.3 inches)72%moderate
December Weather8°C (48°F)29 mm (1.1 inches)76%moderate

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