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April Weather in Louisville, United States

Last updated: June 24, 2025

In Louisville, United States, the average temperature in April hovers around 13°C (56°F), but prepare for a wider range: it can dip to a chilly -3°C (26°F) or soar to a warm 30°C (86°F). Expect about 121 mm (4.8 in) of precipitation over 10 days, while the air carries a notable average humidity of 83%. Stay prepared for diverse weather conditions!

April Temperature in Louisville

In April in Louisville, the average temperature is 13°C (56°F). The maximum can reach 30°C (86°F), while the minimum can drop as low as -3°C (26°F). Be prepared for a wide range of temperatures when planning your travels during this month.

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 13°C (56°F), with highs reaching up to 30°C (86°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec333647556877807673604439
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 121 mm (4.8 in) spread over a period of 10 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 121 mm (4.8 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec88981351211461119897681169385
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 83%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making travel a bit uncomfortable as the air feels heavy and the moisture clings to your skin.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%84%83%80%83%82%83%79%79%88%87%
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 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For 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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357911111099643
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 Weather0°C (33°F)88 mm (3.4 inches)84%moderate
February Weather2°C (36°F)98 mm (3.9 inches)82%moderate
March Weather8°C (47°F)135 mm (5.3 inches)84%high
April Weather13°C (56°F)121 mm (4.8 inches)83%very high
May Weather20°C (68°F)146 mm (5.7 inches)80%extreme
June Weather25°C (77°F)111 mm (4.4 inches)83%extreme
July Weather26°C (80°F)98 mm (3.8 inches)82%very high
August Weather25°C (77°F)97 mm (3.8 inches)82%very high
September Weather23°C (73°F)68 mm (2.7 inches)79%very high
October Weather15°C (60°F)116 mm (4.6 inches)79%high
November Weather7°C (44°F)93 mm (3.7 inches)88%moderate
December Weather4°C (39°F)85 mm (3.3 inches)87%moderate

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