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December Weather in Sandy, United States

Last updated: June 24, 2025

In December, the average temperature in Sandy, United States hovers around 4°C (40°F). Expect chilly conditions with a minimum dropping to -10°C (14°F), while highs can reach a pleasant 16°C (61°F). This month brings a significant precipitation of 297 mm (11.7 in), spread over about 20 days, and you'll likely feel the average humidity at a high 88%. Prepare for a blend of cold and wet weather!

December Temperature in Sandy

In December in Sandy, the average temperature is 4°C (40°F). Maximums can reach 16°C (61°F) and minimums can be as low as -10°C (14°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both chilly and mild conditions.

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

The chart illustrates December temperature patterns in Sandy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sandy, December typically has an average temperature of 4°C (40°F), with highs reaching up to 16°C (61°F) and lows dropping to around -10°C (14°F).
JanFebMarAprMayJunJulAugSepOctNovDec393843495561666861514539
Data source: Temperature data for Sandy 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 Sandy

In Sandy in December, the total precipitation amount is 297 mm (11.7 in) spread over 20 days.

December Precipitation Trends in Sandy

The chart displays monthly precipitation patterns in Sandy, 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 Sandy, December typically receives around 297 mm (11.7 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec25831019918397831215114229276297
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Sandy

In Sandy in December, humidity is 88%. With an average temperature of 4°C (40°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration less enjoyable and prompting you to seek cozy indoor activities instead.

December Average Humidity in Sandy

This chart illustrates the average monthly humidity levels in Sandy, 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 Sandy is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%87%86%85%80%82%79%63%59%78%88%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Sandy

In Sandy 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 Sandy, you can visit Hourly UV Index in Sandy.

Maximum UV Index Levels in Sandy for December

The chart shows the monthly maximum UV Index (UVI) for Sandy 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 Sandy typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2356991087532
Data source: Sandy 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 Sandy Compares to Other Months

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

This table compares monthly weather conditions in Sandy, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather4°C (40°F)258 mm (10.1 inches)86%low
February Weather3°C (38°F)310 mm (12.2 inches)87%moderate
March Weather6°C (44°F)199 mm (7.8 inches)86%moderate
April Weather9°C (49°F)183 mm (7.2 inches)85%high
May Weather13°C (56°F)97 mm (3.8 inches)80%very high
June Weather16°C (61°F)83 mm (3.3 inches)82%very high
July Weather19°C (67°F)11 mm (0.5 inches)78%very high
August Weather20°C (68°F)15 mm (0.6 inches)62%very high
September Weather16°C (62°F)114 mm (4.5 inches)59%high
October Weather10°C (51°F)229 mm (9.0 inches)78%moderate
November Weather7°C (45°F)276 mm (10.9 inches)88%moderate
December Weather4°C (40°F)297 mm (11.7 inches)88%low

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