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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 -2°C (29°F), with a minimum dipping to a chilly -23°C (-10°F) and a maximum reaching a mild 17°C (62°F). Expect precipitation totaling 131 mm (5.1 in) over approximately 17 days, coupled with an average humidity of 86%. Prepare for a brisk month filled with weather contrasts in this picturesque locale!

December Temperature in Rome

In December in Rome, the average temperature is -2°C (29°F). Maximum temperatures can reach 17°C (62°F), while minimums can drop as low as -23°C (-10°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

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 -2°C (29°F), with highs reaching up to 17°C (62°F) and lows dropping to around -23°C (-10°F).
JanFebMarAprMayJunJulAugSepOctNovDec232633455766716962523729
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 131 mm (5.1 in) over a period of 17 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 131 mm (5.1 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec10911910713814012417512896188132131
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 86%. With an average temperature of -2°C (29°F), this humidity feels like a damp chill that seeps through layers of clothing, making outdoor activities uncomfortable and travel plans challenging.

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 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%90%87%88%82%79%78%76%78%84%89%86%
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.
JanFebMarAprMayJunJulAugSepOctNovDec3468910998632
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-5°C (23°F)109 mm (4.3 inches)90%moderate
February Weather-3°C (26°F)119 mm (4.7 inches)90%moderate
March Weather0°C (33°F)107 mm (4.2 inches)87%high
April Weather7°C (45°F)138 mm (5.4 inches)88%very high
May Weather14°C (58°F)140 mm (5.5 inches)82%very high
June Weather19°C (66°F)124 mm (4.9 inches)79%very high
July Weather22°C (71°F)175 mm (6.9 inches)78%very high
August Weather21°C (69°F)128 mm (5.0 inches)76%very high
September Weather17°C (62°F)96 mm (3.8 inches)78%very high
October Weather11°C (52°F)188 mm (7.4 inches)84%high
November Weather3°C (37°F)132 mm (5.2 inches)89%moderate
December Weather-2°C (29°F)131 mm (5.1 inches)86%low

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