January Weather in Louisville, United States

Last updated: June 24, 2025

In January, the average temperature in Louisville, United States hovers around 8°C (47°F). Expect a wide range, with minimums plummeting to -14°C (8°F) and maximums peaking at 27°C (80°F). It's a relatively wet month, with 110 mm (4.3 in) of precipitation spread over 8 days. The air is quite humid, with an average humidity level of 85%.

January Temperature in Louisville

In January in Louisville, the average temperature is 8°C (47°F). The maximum can reach 27°C (80°F), while the minimum can drop as low as -14°C (8°F). It's a season of contrasts, so travelers should be prepared for both warm days and chilly nights.

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 8°C (47°F), with highs reaching up to 27°C (80°F) and lows dropping to around -14°C (8°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 110 mm (4.3 in) over a period 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 110 mm (4.3 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 85%. With an average temperature of 8°C (47°F), this humidity feels like a chilly dampness that clings to your skin, making outdoor activities feel less refreshing and more uncomfortable for traveling.

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 85%, 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	8°C (47°F)	110 mm (4.3 inches)	85%	moderate
February Weather	11°C (52°F)	181 mm (7.1 inches)	84%	high
March Weather	15°C (59°F)	130 mm (5.1 inches)	82%	very high
April Weather	17°C (64°F)	167 mm (6.6 inches)	82%	very high
May Weather	23°C (73°F)	127 mm (5.0 inches)	82%	extreme
June Weather	26°C (78°F)	164 mm (6.4 inches)	79%	extreme
July Weather	27°C (81°F)	120 mm (4.7 inches)	82%	extreme
August Weather	27°C (80°F)	130 mm (5.1 inches)	77%	extreme
September Weather	25°C (77°F)	95 mm (3.7 inches)	74%	very high
October Weather	20°C (68°F)	111 mm (4.4 inches)	73%	very high
November Weather	12°C (54°F)	67 mm (2.6 inches)	85%	high
December Weather	10°C (51°F)	120 mm (4.7 inches)	88%	moderate