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December Weather in Sand Hill, United States

Last updated: June 24, 2025

In December, the average temperature in Sand Hill, United States hovers around 3°C (38°F). It's a month of contrasts, where temperatures can dip to a chilling -12°C (11°F) or rise to a pleasant 18°C (65°F). Expect 96 mm (3.8 in) of precipitation spread over 10 days, contributing to an average humidity level of 85%. Prepare for a mix of brisk air and occasional dampness!

December Temperature in Sand Hill

In December in Sand Hill, the average temperature is 3°C (38°F). The maximum can reach 18°C (65°F), while the minimum can drop as low as -12°C (11°F). This temperature variation means travelers should prepare for both chilly and milder conditions during their stay.

December Weather in Sand Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Sand Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sand Hill, December typically has an average temperature of 3°C (38°F), with highs reaching up to 18°C (65°F) and lows dropping to around -12°C (11°F).
JanFebMarAprMayJunJulAugSepOctNovDec343743536372787569594437
Data source: Temperature data for Sand Hill 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 Sand Hill

In Sand Hill in December, the total precipitation amount is 96 mm (3.8 in) over a span of 10 days.

December Precipitation Trends in Sand Hill

The chart displays monthly precipitation patterns in Sand Hill, 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 Sand Hill, December typically receives around 96 mm (3.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec69106100104125951321281081069296
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sand Hill

In Sand Hill in December, humidity is 85%. With an average temperature of 3°C (38°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities uncomfortable and travel less enjoyable as you contend with the heavy, cold air surrounding you.

December Average Humidity in Sand Hill

This chart illustrates the average monthly humidity levels in Sand Hill, 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 Sand Hill is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%85%83%75%74%65%62%66%79%87%85%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sand Hill

In Sand Hill in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Sand Hill, you can visit Hourly UV Index in Sand Hill.

Maximum UV Index Levels in Sand Hill for December

The chart shows the monthly maximum UV Index (UVI) for Sand Hill 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 Sand Hill typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Sand Hill 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 Sand Hill Compares to Other Months

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

This table compares monthly weather conditions in Sand Hill, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)69 mm (2.7 inches)87%moderate
February Weather3°C (37°F)106 mm (4.2 inches)85%moderate
March Weather6°C (43°F)100 mm (3.9 inches)85%high
April Weather12°C (53°F)104 mm (4.1 inches)83%very high
May Weather17°C (64°F)125 mm (4.9 inches)75%very high
June Weather22°C (73°F)95 mm (3.7 inches)73%very high
July Weather25°C (78°F)132 mm (5.2 inches)65%very high
August Weather24°C (76°F)128 mm (5.0 inches)62%very high
September Weather21°C (70°F)108 mm (4.3 inches)66%very high
October Weather15°C (59°F)106 mm (4.2 inches)79%high
November Weather7°C (45°F)92 mm (3.6 inches)87%moderate
December Weather3°C (38°F)96 mm (3.8 inches)85%low

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