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December Weather in Louisville, United States

Last updated: June 24, 2025

In December, the average temperature in Louisville, United States rests at a cool 10°C (51°F). During this month, temperatures can dip as low as -6°C (22°F) and rise to a warm 26°C (79°F). Expect 120 mm (4.7 in) of precipitation spread over 11 days, with an average humidity of 88%. Prepare for a mix of weather conditions!

December Temperature in Louisville

In December in Louisville, the average temperature is 10°C (51°F). Maximums can reach 26°C (79°F), while minimums can dip as low as -6°C (22°F). Visitors should be prepared for a wide range of temperatures when traveling to Louisville during this time.

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

The chart illustrates December temperature patterns in Louisville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Louisville, December typically has an average temperature of 10°C (51°F), with highs reaching up to 26°C (79°F) and lows dropping to around -6°C (22°F).
JanFebMarAprMayJunJulAugSepOctNovDec475259637378818077675350
Data source: Temperature data for Louisville 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 Louisville

In Louisville in December, the precipitation amount is 120 mm (4.7 in) during a span of 11 days.

December Precipitation Trends in Louisville

The chart displays monthly precipitation patterns in Louisville, 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 Louisville, December typically receives around 120 mm (4.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec1101811301671271641201309511167120
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Louisville

In Louisville in December, humidity is 88%. With an average temperature of 10°C (51°F), this humidity feels like a thick blanket of moisture enveloping you, making every step feel heavier and leaving you yearning for a refreshing breeze as you navigate the streets.

December Average Humidity in Louisville

This chart illustrates the average monthly humidity levels in Louisville, 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 Louisville is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Louisville

In Louisville 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 Louisville for better planning.

Maximum UV Index Levels in Louisville for December

The chart shows the monthly maximum UV Index (UVI) for Louisville 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 Louisville typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
Data source: Louisville 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 Louisville Compares to Other Months

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

This table compares monthly weather conditions in Louisville, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)110 mm (4.3 inches)85%moderate
February Weather11°C (52°F)181 mm (7.1 inches)84%high
March Weather15°C (59°F)130 mm (5.1 inches)82%very high
April Weather17°C (64°F)167 mm (6.6 inches)82%very high
May Weather23°C (73°F)127 mm (5.0 inches)82%extreme
June Weather26°C (78°F)164 mm (6.4 inches)79%extreme
July Weather27°C (81°F)120 mm (4.7 inches)82%extreme
August Weather27°C (80°F)130 mm (5.1 inches)77%extreme
September Weather25°C (77°F)95 mm (3.7 inches)74%very high
October Weather20°C (68°F)111 mm (4.4 inches)73%very high
November Weather12°C (54°F)67 mm (2.6 inches)85%high
December Weather10°C (51°F)120 mm (4.7 inches)88%moderate

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