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April Weather in Louisville, United States

Last updated: June 24, 2025

In Louisville, United States, the average temperature in April is a pleasant 17°C (64°F). However, prepare for a range of weather, as temperatures can dip to a minimum of 1°C (33°F) and soar to a maximum of 31°C (88°F). Expect 167 mm (6.6 in) of precipitation spread over approximately 9 days, and keep in mind the average humidity sits at a comfortable 82%.

April Temperature in Louisville

In April in Louisville, the average temperature is 17°C (64°F), with maximums reaching 31°C (88°F) and minimums dropping to as low as 1°C (33°F). This diverse range makes Louisville an ideal destination for travelers seeking both warmth and cooler evenings.

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 17°C (64°F), with highs reaching up to 31°C (88°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec475259637378818077675350
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 total precipitation amount is 167 mm (6.6 in), occurring 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 167 mm (6.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec1101811301671271641201309511167120
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 82%. With an average temperature of 17°C (64°F), this humidity feels like a damp embrace that can make traveling quite uncomfortable, as the sticky air clings to your skin and leaves you yearning for a cool breeze.

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 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%84%82%82%82%79%82%77%74%73%85%88%
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 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 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 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111119864
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 Weather8°C (47°F)110 mm (4.3 inches)85%moderate
February Weather11°C (52°F)181 mm (7.1 inches)84%high
March Weather15°C (59°F)130 mm (5.1 inches)82%very high
April Weather17°C (64°F)167 mm (6.6 inches)82%very high
May Weather23°C (73°F)127 mm (5.0 inches)82%extreme
June Weather26°C (78°F)164 mm (6.4 inches)79%extreme
July Weather27°C (81°F)120 mm (4.7 inches)82%extreme
August Weather27°C (80°F)130 mm (5.1 inches)77%extreme
September Weather25°C (77°F)95 mm (3.7 inches)74%very high
October Weather20°C (68°F)111 mm (4.4 inches)73%very high
November Weather12°C (54°F)67 mm (2.6 inches)85%high
December Weather10°C (51°F)120 mm (4.7 inches)88%moderate

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