January Weather in Louisville, United States

Last updated: June 24, 2025

In January, the average temperature in Louisville, United States hovers around 10°C (50°F), with a remarkable range. Expect minimums dipping to -7°C (20°F) and maximums climbing to 27°C (81°F). This month brings about 89 mm (3.5 in) of precipitation over approximately 8 days, contributing to an average humidity of a humid 86%. Don't forget your umbrella!

January Temperature in Louisville

In January in Louisville, the average temperature is 10°C (50°F). Maximums can reach 27°C (81°F), while minimums can be as low as -7°C (20°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your travels.

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

The chart illustrates January 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, January typically has an average temperature of 10°C (50°F), with highs reaching up to 27°C (81°F) and lows dropping to around -7°C (20°F).

Data source: Temperature data for Louisville generated using information from the Copernicus Climate Change Service.

January Precipitation in Louisville

In Louisville in January, the precipitation amount is 89 mm (3.5 in) over a span of 8 days.

January Precipitation Trends in Louisville

The chart displays monthly precipitation patterns in Louisville, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Louisville, January typically receives around 89 mm (3.5 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Louisville

In Louisville in January humidity is 86%. With an average temperature of 10°C (50°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities uncomfortable and sticky, which can dampen the spirit of travel.

January Average Humidity in Louisville

This chart illustrates the average monthly humidity levels in Louisville, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Louisville is approximately 86%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for January generated using information from the Copernicus Climate Change Service.

January UV Index in Louisville

In Louisville in January, 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 January

The chart shows the monthly maximum UV Index (UVI) for Louisville in January, 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 January, the maximum UV index in Louisville typically reaches 4, which falls under the moderate exposure category.

Data source: Louisville January 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 January 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 January’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 January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (50°F)	89 mm (3.5 inches)	86%	moderate
February Weather	13°C (55°F)	116 mm (4.6 inches)	84%	high
March Weather	15°C (60°F)	70 mm (2.8 inches)	83%	very high
April Weather	19°C (67°F)	99 mm (3.9 inches)	81%	very high
May Weather	24°C (75°F)	95 mm (3.7 inches)	81%	extreme
June Weather	27°C (80°F)	119 mm (4.7 inches)	81%	extreme
July Weather	28°C (83°F)	109 mm (4.3 inches)	83%	extreme
August Weather	28°C (82°F)	108 mm (4.3 inches)	81%	extreme
September Weather	26°C (79°F)	83 mm (3.3 inches)	82%	very high
October Weather	21°C (70°F)	97 mm (3.8 inches)	78%	very high
November Weather	13°C (56°F)	55 mm (2.2 inches)	86%	high
December Weather	11°C (52°F)	112 mm (4.4 inches)	89%	moderate