December Weather in Louisville, United States

Last updated: June 24, 2025

In December, the average temperature in Louisville, United States hovers around 11°C (52°F). Visitors can expect a range from a chilly -5°C (24°F) at its lowest to a warm 27°C (81°F) at its peak. The area experiences approximately 112 mm (4.4 in) of precipitation over 10 days, contributing to an average humidity level of 89%. Embrace the climate and pack accordingly!

December Temperature in Louisville

In December in Louisville, the average temperature is 11°C (52°F). Maximums can reach 27°C (81°F), while minimums can dip to as low as -5°C (24°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack layers for both warm and cool conditions.

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 11°C (52°F), with highs reaching up to 27°C (81°F) and lows dropping to around -5°C (24°F).
JanFebMarAprMayJunJulAugSepOctNovDec505560667580838279705652
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 total precipitation amount is 112 mm (4.4 in) over the course of 10 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 112 mm (4.4 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec89117709995119109109839755113
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 89%. With an average temperature of 11°C (52°F), this humidity feels like a cool mist clinging to your skin, making outdoor activities feel damp and chilly, so it's essential to dress in layers and be prepared for a brisk experience while traveling.

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 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%84%83%81%81%81%83%81%82%78%86%89%
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.
JanFebMarAprMayJunJulAugSepOctNovDec47910111111119864
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 Weather10°C (50°F)89 mm (3.5 inches)86%moderate
February Weather13°C (55°F)116 mm (4.6 inches)84%high
March Weather15°C (60°F)70 mm (2.8 inches)83%very high
April Weather19°C (67°F)99 mm (3.9 inches)81%very high
May Weather24°C (75°F)95 mm (3.7 inches)81%extreme
June Weather27°C (80°F)119 mm (4.7 inches)81%extreme
July Weather28°C (83°F)109 mm (4.3 inches)83%extreme
August Weather28°C (82°F)108 mm (4.3 inches)81%extreme
September Weather26°C (79°F)83 mm (3.3 inches)82%very high
October Weather21°C (70°F)97 mm (3.8 inches)78%very high
November Weather13°C (56°F)55 mm (2.2 inches)86%high
December Weather11°C (52°F)112 mm (4.4 inches)89%moderate

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