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April Weather in Louisville, United States

Last updated: June 24, 2025

In April, the average temperature in Louisville, United States hovers around 10°C (51°F). However, be prepared for a range of weather, as temperatures can dip as low as -10°C (15°F) and soar to a balmy 32°C (90°F). During this month, precipitation averages 52 mm (2.0 in) over 9 days, accompanied by an average humidity level of 74%. 🌦️

April Temperature in Louisville

In April in Louisville, the average temperature is 10°C (51°F). Maximum temperatures can reach 32°C (90°F), while minimums can drop as low as -10°C (15°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates April 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, April typically has an average temperature of 10°C (51°F), with highs reaching up to 32°C (90°F) and lows dropping to around -10°C (15°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.

April Precipitation in Louisville

In Louisville in April, the precipitation amount is 52 mm (2.0 in) over a span of 9 days.

April Precipitation Trends in Louisville

The chart displays monthly precipitation patterns in Louisville, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Louisville, April typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec333099521391218992881313037
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Louisville

In Louisville in April humidity is 74%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill enveloping you, making travel a bit uncomfortable as the cold air clings to your skin, and you may find yourself wishing you had packed an extra layer to stay warm and dry.

April Average Humidity in Louisville

This chart illustrates the average monthly humidity levels in Louisville, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Louisville is approximately 74%, 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 April generated using information from the Copernicus Climate Change Service.

April UV Index in Louisville

In Louisville in April, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Louisville.

Maximum UV Index Levels in Louisville for April

The chart shows the monthly maximum UV Index (UVI) for Louisville in April, 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 April, the maximum UV index in Louisville typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356810101098642
Data source: Louisville April 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 April 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 April’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 April’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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