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December Weather in Rome, United States

Last updated: June 24, 2025

In December, the average temperature in Rome, United States hovers around 1°C (34°F). Expect a chilling minimum of -21°C (-6°F), while the mercury may rise to a maximum of 20°C (68°F). The month brings 52 mm (2.1 in) of precipitation spread over 6 days, contributing to an average humidity level of 84%.

December Temperature in Rome

In December in Rome, the average temperature is 1°C (34°F). The maximum can reach 20°C (68°F), while the minimum can be as low as -21°C (-6°F). It's advisable to pack layers when traveling to this destination during this time of year, as the temperature can fluctuate significantly.

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

The chart illustrates December temperature patterns in Rome, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rome, December typically has an average temperature of 1°C (34°F), with highs reaching up to 20°C (68°F) and lows dropping to around -21°C (-6°F).
JanFebMarAprMayJunJulAugSepOctNovDec262841506374777469554034
Data source: Temperature data for Rome 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 Rome

In Rome in December, the precipitation amount is 52 mm (2.1 in) over the course of 6 days.

December Precipitation Trends in Rome

The chart displays monthly precipitation patterns in Rome, 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 Rome, December typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec586510011416215810470791355652
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Rome

In Rome in December humidity is 84%. With an average temperature of 1°C (34°F), this humidity feels like a biting chill that seeps into your bones, making travel uncomfortable and requiring extra layers to keep warm while navigating the damp air.

December Average Humidity in Rome

This chart illustrates the average monthly humidity levels in Rome, 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 Rome is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rome

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

Maximum UV Index Levels in Rome for December

The chart shows the monthly maximum UV Index (UVI) for Rome 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 Rome typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098642
Data source: Rome 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 Rome Compares to Other Months

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

This table compares monthly weather conditions in Rome, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)58 mm (2.3 inches)82%moderate
February Weather-2°C (28°F)65 mm (2.6 inches)83%moderate
March Weather5°C (41°F)100 mm (3.9 inches)84%high
April Weather10°C (50°F)114 mm (4.5 inches)85%very high
May Weather17°C (63°F)162 mm (6.4 inches)79%very high
June Weather23°C (74°F)158 mm (6.2 inches)82%extreme
July Weather25°C (77°F)104 mm (4.1 inches)80%very high
August Weather23°C (74°F)70 mm (2.8 inches)81%very high
September Weather21°C (69°F)79 mm (3.1 inches)80%very high
October Weather13°C (56°F)135 mm (5.3 inches)82%high
November Weather4°C (40°F)55 mm (2.2 inches)88%moderate
December Weather1°C (34°F)52 mm (2.1 inches)84%low

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