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December Weather in Smithfield, United States

Last updated: June 24, 2025

The average temperature in Smithfield, United States during December is a cool 8°C (46°F). Expect temperatures to range from a chilly -8°C (18°F) at their lowest to a mild 23°C (74°F) at their peak. During this month, anticipate approximately 84 mm (3.3 in) of precipitation spread over 9 days, with an average humidity level of 84%. Prepare accordingly for a versatile climate!

December Temperature in Smithfield

In December in Smithfield, the average temperature is 8°C (46°F). The maximum can reach 23°C (74°F), while the minimum can drop as low as -8°C (18°F). Be prepared for a wide range of temperatures when planning your travels during this time.

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

The chart illustrates December temperature patterns in Smithfield, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Smithfield, December typically has an average temperature of 8°C (46°F), with highs reaching up to 23°C (74°F) and lows dropping to around -8°C (18°F).
JanFebMarAprMayJunJulAugSepOctNovDec424651606976807974655146
Data source: Temperature data for Smithfield 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 Smithfield

In Smithfield in December, the precipitation amount is 84 mm (3.3 in) spread over 9 days.

December Precipitation Trends in Smithfield

The chart displays monthly precipitation patterns in Smithfield, 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 Smithfield, December typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec8510788106123117135169126897685
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Smithfield

In Smithfield in December humidity is 84%. With an average temperature of 8°C (46°F), this humidity feels like a chilly mist wrapping around you, making outdoor exploration cumbersome and layering your clothing a necessity for comfort.

December Average Humidity in Smithfield

This chart illustrates the average monthly humidity levels in Smithfield, 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 Smithfield is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%82%81%80%82%81%81%78%80%84%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Smithfield

In Smithfield 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 Smithfield, you can check the information here.

Maximum UV Index Levels in Smithfield for December

The chart shows the monthly maximum UV Index (UVI) for Smithfield 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 Smithfield typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3679101011109853
Data source: Smithfield 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 Smithfield Compares to Other Months

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

This table compares monthly weather conditions in Smithfield, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)85 mm (3.3 inches)84%moderate
February Weather8°C (47°F)107 mm (4.2 inches)83%high
March Weather10°C (51°F)88 mm (3.5 inches)82%high
April Weather16°C (61°F)106 mm (4.2 inches)81%very high
May Weather20°C (69°F)122 mm (4.8 inches)80%very high
June Weather24°C (76°F)117 mm (4.6 inches)82%very high
July Weather27°C (81°F)135 mm (5.3 inches)81%extreme
August Weather26°C (79°F)169 mm (6.7 inches)81%very high
September Weather23°C (74°F)126 mm (4.9 inches)78%very high
October Weather18°C (65°F)89 mm (3.5 inches)80%very high
November Weather11°C (52°F)76 mm (3.0 inches)84%moderate
December Weather8°C (46°F)84 mm (3.3 inches)84%moderate

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