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December Weather in Roma, United States

Last updated: June 24, 2025

In December, the average temperature in Roma, United States hovers around 17°C (64°F), with fluctuations that can see lows of 1°C (35°F) and highs reaching up to 34°C (93°F). This period typically experiences 20 mm (0.8 in) of precipitation over about 3 days, contributing to an average humidity of 86%.

December Temperature in Roma

In December in Roma, the average temperature is 17°C (64°F). The maximum can reach 34°C (93°F), while the minimum can drop as low as 1°C (35°F). It's advisable to pack a variety of clothing to accommodate both warm and cool temperatures during your travels.

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

The chart illustrates December temperature patterns in Roma, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Roma, December typically has an average temperature of 17°C (64°F), with highs reaching up to 34°C (93°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec616573788486888984776863
Data source: Temperature data for Roma 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 Roma

In Roma in December, the precipitation amount is 20 mm (0.8 in) accumulated over a period of 3 days.

December Precipitation Trends in Roma

The chart displays monthly precipitation patterns in Roma, 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 Roma, December typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec1623323767666913110383620
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Roma

In Roma in December humidity is 86%. With an average temperature of 17°C (64°F), this humidity feels like a warm blanket enveloping you, making travel quite uncomfortable as the moisture clings to your skin and the air feels thick, damp, and heavy.

December Average Humidity in Roma

This chart illustrates the average monthly humidity levels in Roma, 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 Roma is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%79%76%77%80%73%66%65%73%76%80%86%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Roma

In Roma in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Roma, you can refer to this Hourly UV Index in Roma.

Maximum UV Index Levels in Roma for December

The chart shows the monthly maximum UV Index (UVI) for Roma 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 Roma typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec6810111212121211976
Data source: Roma 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 Roma Compares to Other Months

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

This table compares monthly weather conditions in Roma, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)16 mm (0.6 inches)83%high
February Weather18°C (65°F)23 mm (0.9 inches)79%very high
March Weather23°C (73°F)32 mm (1.2 inches)76%very high
April Weather26°C (78°F)37 mm (1.4 inches)77%extreme
May Weather29°C (84°F)67 mm (2.6 inches)80%extreme
June Weather30°C (87°F)66 mm (2.6 inches)73%extreme
July Weather31°C (88°F)69 mm (2.7 inches)66%extreme
August Weather32°C (89°F)13 mm (0.5 inches)65%extreme
September Weather29°C (84°F)110 mm (4.3 inches)73%extreme
October Weather25°C (78°F)38 mm (1.5 inches)76%very high
November Weather20°C (69°F)36 mm (1.4 inches)80%high
December Weather17°C (64°F)20 mm (0.8 inches)86%high

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