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December Weather in Holtville, United States

Last updated: June 24, 2025

In December, the average temperature in Holtville, United States hovers around 11°C (51°F). However, be prepared for a range of conditions, as temperatures can drop to a brisk -6°C (22°F) or rise to a comfortable 25°C (78°F). With an average precipitation of 148 mm (5.8 in) over 12 days and a high humidity level of 88%, it's wise to pack accordingly for this vibrant month!

December Temperature in Holtville

In December in Holtville, the average temperature is 11°C (51°F). The maximum can reach 25°C (78°F), and the minimum can be as low as -6°C (22°F). It's advisable to pack layers to accommodate the fluctuating temperatures while enjoying your visit.

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

The chart illustrates December temperature patterns in Holtville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Holtville, December typically has an average temperature of 11°C (51°F), with highs reaching up to 25°C (78°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec485459647378818077695551
Data source: Temperature data for Holtville 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 Holtville

In Holtville in December, the precipitation amount is 148 mm (5.8 in), which falls over a span of 12 days.

December Precipitation Trends in Holtville

The chart displays monthly precipitation patterns in Holtville, 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 Holtville, December typically receives around 148 mm (5.8 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1221471291371281461161119311982148
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Holtville

In Holtville in December humidity is 88%. With an average temperature of 11°C (51°F), this humidity feels like traveling through a damp, heavy blanket, making every step slightly more laborious and the air thick with moisture, which can be quite uncomfortable for exploration.

December Average Humidity in Holtville

This chart illustrates the average monthly humidity levels in Holtville, 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 Holtville is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%81%77%77%72%73%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Holtville

In Holtville 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 Holtville for better planning.

Maximum UV Index Levels in Holtville for December

The chart shows the monthly maximum UV Index (UVI) for Holtville 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 Holtville typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Holtville 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 Holtville Compares to Other Months

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

This table compares monthly weather conditions in Holtville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (48°F)122 mm (4.8 inches)85%moderate
February Weather12°C (54°F)147 mm (5.8 inches)84%high
March Weather15°C (60°F)129 mm (5.1 inches)82%very high
April Weather18°C (65°F)137 mm (5.4 inches)82%very high
May Weather23°C (73°F)128 mm (5.0 inches)81%extreme
June Weather26°C (78°F)146 mm (5.7 inches)77%extreme
July Weather27°C (81°F)116 mm (4.6 inches)77%extreme
August Weather27°C (81°F)111 mm (4.4 inches)72%extreme
September Weather25°C (78°F)93 mm (3.6 inches)73%very high
October Weather20°C (69°F)119 mm (4.7 inches)73%very high
November Weather13°C (55°F)82 mm (3.2 inches)85%high
December Weather11°C (51°F)148 mm (5.8 inches)88%moderate

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