January Weather in Louisville, United States

Last updated: June 24, 2025

In Louisville, United States, the average temperature in January hovers around -1°C (30°F). However, temperatures can range dramatically, with minimums plummeting to -25°C (-12°F) and maximums soaring up to 21°C (69°F). Expect about 90 mm (3.5 in) of precipitation spread over 12 days, alongside an average humidity level of 88%. Stay prepared for varying weather conditions!

January Temperature in Louisville

In January in Louisville, the average temperature is -1°C (30°F), with maximums reaching 21°C (69°F) and minimums dropping as low as -25°C (-12°F). Be sure to pack appropriately for a wide range of temperatures if you plan to travel during this time.

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 -1°C (30°F), with highs reaching up to 21°C (69°F) and lows dropping to around -25°C (-12°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 90 mm (3.5 in) spread over 12 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 90 mm (3.5 inches) of precipitation spread over approximately 12 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 88%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through your layers, making travel uncomfortable as every gust of wind becomes a sharp reminder of the cold and damp air surrounding you.

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 88%, 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 is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Louisville, you can check the information here.

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 3, 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	-1°C (30°F)	90 mm (3.5 inches)	88%	moderate
February Weather	1°C (33°F)	104 mm (4.1 inches)	88%	moderate
March Weather	5°C (41°F)	101 mm (4.0 inches)	87%	high
April Weather	10°C (51°F)	134 mm (5.3 inches)	87%	very high
May Weather	17°C (62°F)	119 mm (4.7 inches)	81%	very high
June Weather	21°C (70°F)	128 mm (5.0 inches)	83%	very high
July Weather	24°C (75°F)	126 mm (5.0 inches)	82%	very high
August Weather	22°C (73°F)	96 mm (3.8 inches)	76%	very high
September Weather	20°C (68°F)	108 mm (4.2 inches)	77%	very high
October Weather	14°C (57°F)	110 mm (4.3 inches)	82%	high
November Weather	5°C (41°F)	93 mm (3.7 inches)	89%	moderate
December Weather	2°C (35°F)	93 mm (3.7 inches)	86%	low