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December Weather in Florence, United States

Last updated: June 24, 2025

In December, the average temperature in Florence, United States hovers around -1°C (31°F), with extremes ranging from a frigid -19°C (-1°F) to a surprisingly warm 20°C (69°F). During this time, you can expect 11 mm (0.4 in) of precipitation spread over about 3 days, contributing to an average humidity level of 89%. Whether you're bundling up against the cold or experiencing unexpected warmth, Florence offers a unique and dynamic climate this month.

December Temperature in Florence

In December in Florence, the average temperature is -1°C (31°F), with maximums reaching 20°C (69°F) and minimums dropping as low as -19°C (-1°F). Travelers should be prepared for a wide range of temperatures, so packing layers is essential.

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

The chart illustrates December temperature patterns in Florence, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Florence, December typically has an average temperature of -1°C (31°F), with highs reaching up to 20°C (69°F) and lows dropping to around -19°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec282739465567716964483831
Data source: Temperature data for Florence 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 Florence

In Florence in December, the precipitation amount is 11 mm (0.4 in) over the course of 3 days.

December Precipitation Trends in Florence

The chart displays monthly precipitation patterns in Florence, 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 Florence, December typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec152137416442786231251611
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Florence

In Florence in December humidity is 89%. With an average temperature of -1°C (31°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and urging you to seek warmth indoors.

December Average Humidity in Florence

This chart illustrates the average monthly humidity levels in Florence, 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 Florence is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%81%76%67%58%52%56%65%76%82%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Florence

In Florence 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 Florence for better planning.

Maximum UV Index Levels in Florence for December

The chart shows the monthly maximum UV Index (UVI) for Florence 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 Florence typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec479111213121210754
Data source: Florence 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 Florence Compares to Other Months

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

This table compares monthly weather conditions in Florence, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)15 mm (0.6 inches)88%moderate
February Weather-3°C (28°F)21 mm (0.8 inches)87%high
March Weather4°C (39°F)37 mm (1.5 inches)81%very high
April Weather8°C (46°F)41 mm (1.6 inches)76%extreme
May Weather13°C (55°F)64 mm (2.5 inches)66%extreme
June Weather20°C (68°F)42 mm (1.7 inches)58%extreme
July Weather22°C (72°F)78 mm (3.1 inches)52%extreme
August Weather21°C (70°F)62 mm (2.4 inches)56%extreme
September Weather18°C (64°F)31 mm (1.2 inches)65%very high
October Weather9°C (48°F)25 mm (1.0 inches)76%high
November Weather3°C (38°F)15 mm (0.6 inches)82%moderate
December Weather-1°C (31°F)11 mm (0.4 inches)89%moderate

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