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May Weather in Louisville, United States

Last updated: June 24, 2025

In May, the average temperature in Louisville, United States hovers around 17°C (64°F), making it a pleasant time to visit. However, be prepared for a temperature range that can swing from a cool 2°C (36°F) to a sweltering 38°C (100°F). The weather is often accompanied by significant rainfall, with 139 mm (5.5 in) expected over 14 days. Expect relatively high humidity levels, averaging 78%, which may add to the overall warmth of the atmosphere.

May Temperature in Louisville

In May in Louisville, the average temperature is 17°C (64°F). The maximum can reach 38°C (100°F), and the minimum can be as low as 2°C (36°F). Be prepared for a wide range of weather conditions when traveling during this month.

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

The chart illustrates May 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, May typically has an average temperature of 17°C (64°F), with highs reaching up to 38°C (100°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec262642516377787570534132
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.

May Precipitation in Louisville

In Louisville, in May, the precipitation amount is 139 mm (5.5 in) over the course of 14 days.

May Precipitation Trends in Louisville

The chart displays monthly precipitation patterns in Louisville, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Louisville, May typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 14 days.
JanFebMarAprMayJunJulAugSepOctNovDec333099521391218992881313037
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Louisville

In Louisville in May humidity is 78%. With average temperature 17°C (64°F), this humidity feels like a warm embrace, making travel feel sticky and heavy, as the air wraps around you and the moments spent outdoors leave you longing for a cool respite.

May Average Humidity in Louisville

This chart illustrates the average monthly humidity levels in Louisville, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Louisville is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%80%73%75%78%82%83%81%75%75%82%83%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Louisville

In Louisville in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Louisville.

Maximum UV Index Levels in Louisville for May

The chart shows the monthly maximum UV Index (UVI) for Louisville in May, 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 May, the maximum UV index in Louisville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Louisville May 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 May 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 May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-3°C (26°F)33 mm (1.3 inches)76%moderate
February Weather-3°C (26°F)30 mm (1.2 inches)80%moderate
March Weather5°C (42°F)99 mm (3.9 inches)73%high
April Weather10°C (51°F)52 mm (2.0 inches)74%very high
May Weather17°C (64°F)139 mm (5.5 inches)78%very high
June Weather25°C (77°F)121 mm (4.8 inches)82%very high
July Weather26°C (79°F)89 mm (3.5 inches)83%very high
August Weather24°C (75°F)92 mm (3.6 inches)80%very high
September Weather21°C (70°F)88 mm (3.5 inches)75%very high
October Weather12°C (53°F)131 mm (5.2 inches)75%high
November Weather5°C (41°F)30 mm (1.2 inches)82%moderate
December Weather0°C (32°F)37 mm (1.5 inches)83%low

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