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December Weather in Spreckels, United States

Last updated: June 24, 2025

In December, the average temperature in Spreckels, United States hovers around 10°C (51°F). Expect a minimum of 1°C (34°F) and a pleasant maximum reaching 24°C (75°F). This period sees approximately 100 mm (3.9 in) of precipitation spread over 8 days, contributing to a relatively high average humidity of 80%.

December Temperature in Spreckels

In December in Spreckels, the average temperature is 10°C (51°F), with maximums reaching up to 24°C (75°F) and minimums dropping to as low as 1°C (34°F). This range makes it a perfect time for travelers to enjoy mild weather while exploring the sights.

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

The chart illustrates December temperature patterns in Spreckels, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spreckels, December typically has an average temperature of 10°C (51°F), with highs reaching up to 24°C (75°F) and lows dropping to around 1°C (34°F).
JanFebMarAprMayJunJulAugSepOctNovDec505051535559616362595450
Data source: Temperature data for Spreckels 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 Spreckels

In Spreckels in December, the precipitation amount is 100 mm (3.9 in) spread over the course of 8 days.

December Precipitation Trends in Spreckels

The chart displays monthly precipitation patterns in Spreckels, 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 Spreckels, December typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec1139499332332261941100
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Spreckels

In Spreckels in December, humidity is 80%. With an average temperature of 10°C (51°F), this humidity feels like a damp layer clinging to the skin, making outdoor activities uncomfortable and requiring travelers to dress in layers to cope with the chill and moisture in the air.

December Average Humidity in Spreckels

This chart illustrates the average monthly humidity levels in Spreckels, 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 Spreckels is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Spreckels

In Spreckels in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Spreckels, you can check the information here.

Maximum UV Index Levels in Spreckels for December

The chart shows the monthly maximum UV Index (UVI) for Spreckels 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 Spreckels typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec4589111211119753
Data source: Spreckels 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 Spreckels Compares to Other Months

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

This table compares monthly weather conditions in Spreckels, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)113 mm (4.5 inches)82%moderate
February Weather10°C (50°F)94 mm (3.7 inches)84%moderate
March Weather10°C (51°F)99 mm (3.9 inches)82%very high
April Weather12°C (53°F)33 mm (1.3 inches)78%very high
May Weather13°C (55°F)23 mm (0.9 inches)71%extreme
June Weather15°C (59°F)3 mm (0.1 inches)64%extreme
July Weather16°C (61°F)2 mm (0.1 inches)58%extreme
August Weather17°C (63°F)2 mm (0.1 inches)54%extreme
September Weather17°C (62°F)6 mm (0.3 inches)55%very high
October Weather15°C (59°F)19 mm (0.7 inches)62%high
November Weather12°C (55°F)40 mm (1.6 inches)78%moderate
December Weather10°C (51°F)100 mm (3.9 inches)80%moderate

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