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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 9°C (48°F). Expect a chill, as temperatures can drop to a frigid -7°C (20°F), while the warmest days may reach up to 24°C (75°F). Be prepared for 145 mm (5.7 in) of precipitation spread over 12 days, contributing to a high average humidity of 88%.

December Temperature in Rome

In December in Rome, the average temperature is 9°C (48°F). Maximum temperatures can reach 24°C (75°F), while minimums can drop as low as -7°C (20°F). Given these variations, travelers should be prepared for a wide range of weather conditions.

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 9°C (48°F), with highs reaching up to 24°C (75°F) and lows dropping to around -7°C (20°F).
JanFebMarAprMayJunJulAugSepOctNovDec455056627177807975665248
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 145 mm (5.7 in) over the course of 12 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 145 mm (5.7 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1151791481389412011013710613087145
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 88%. With an average temperature of 9°C (48°F), this humidity feels like a damp chill settling into your bones, making outdoor exploration feel heavy and oppressive.

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 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%87%85%82%83%82%78%67%64%75%87%89%
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 reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Rome for better planning.

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 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111119764
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 Weather7°C (45°F)115 mm (4.5 inches)87%moderate
February Weather10°C (50°F)179 mm (7.1 inches)87%high
March Weather13°C (56°F)148 mm (5.8 inches)85%very high
April Weather17°C (62°F)138 mm (5.4 inches)82%very high
May Weather22°C (72°F)94 mm (3.7 inches)83%extreme
June Weather25°C (77°F)120 mm (4.7 inches)82%extreme
July Weather27°C (80°F)110 mm (4.3 inches)78%extreme
August Weather26°C (79°F)137 mm (5.4 inches)67%extreme
September Weather24°C (75°F)106 mm (4.2 inches)64%very high
October Weather19°C (66°F)130 mm (5.1 inches)74%high
November Weather11°C (52°F)87 mm (3.4 inches)87%high
December Weather9°C (48°F)145 mm (5.7 inches)88%moderate

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