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May Weather in Louisville, United States

Last updated: June 24, 2025

In Louisville, United States, the average temperature in May hovers around 20°C (69°F), creating a pleasant climate for exploration. However, be prepared for a range, as temperatures can dip to a cool 3°C (37°F) or rise to a warm 33°C (91°F). Expect 113 mm (4.5 in) of rain over 12 days, contributing to a humidity level of 85%, which adds to the lush, vibrant atmosphere of the region.

May Temperature in Louisville

In May in Louisville, the average temperature is 20°C (69°F). The maximum can reach 33°C (91°F), and the minimum can be as low as 3°C (37°F). Be prepared for a range of temperatures and pack accordingly for your trip!

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 20°C (69°F), with highs reaching up to 33°C (91°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec414752596975797773634945
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 113 mm (4.5 in) over the course of 12 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 113 mm (4.5 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec1011661611331131031041199112283135
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 85%. With an average temperature of 20°C (69°F), this humidity feels like a warm, sticky embrace that can make even short walks feel tiring, creating a heavy atmosphere that may deter longer excursions but offers an opportunity to explore shaded areas and savor refreshing drinks.

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 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%86%86%82%85%85%83%76%76%80%88%88%
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 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, 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 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810111111109763
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 Weather5°C (42°F)101 mm (4.0 inches)86%moderate
February Weather8°C (47°F)166 mm (6.5 inches)86%high
March Weather11°C (53°F)161 mm (6.3 inches)86%very high
April Weather15°C (59°F)133 mm (5.2 inches)82%very high
May Weather20°C (69°F)113 mm (4.5 inches)85%extreme
June Weather24°C (75°F)102 mm (4.0 inches)85%extreme
July Weather26°C (79°F)104 mm (4.1 inches)83%extreme
August Weather25°C (77°F)119 mm (4.7 inches)76%very high
September Weather23°C (73°F)90 mm (3.6 inches)76%very high
October Weather17°C (63°F)122 mm (4.8 inches)80%high
November Weather9°C (49°F)83 mm (3.3 inches)88%high
December Weather7°C (45°F)135 mm (5.3 inches)88%moderate

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