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April Weather in Knoxville, United States

Last updated: June 24, 2025

In Knoxville, United States, the average temperature in April hovers around 15°C (59°F). However, be prepared for a range where the minimum can dip to -1°C (30°F), and the maximum can reach a warm 30°C (87°F). With an average precipitation of 132 mm (5.2 in) spread over 11 days, and a humidity level of 82%, this month offers a diverse weather experience.

April Temperature in Knoxville

In April in Knoxville, the average temperature is 15°C (59°F). Maximum can reach 30°C (87°F) and minimum can be as low as -1°C (30°F). It's a great time to visit, so pack accordingly to enjoy the range of temperatures!

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

The chart illustrates April temperature patterns in Knoxville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Knoxville, April typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (87°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec414652596975797773634945
Data source: Temperature data for Knoxville 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 Knoxville

In Knoxville in April, the precipitation amount is 132 mm (5.2 in), which occurs over a span of 11 days.

April Precipitation Trends in Knoxville

The chart displays monthly precipitation patterns in Knoxville, 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 Knoxville, April typically receives around 132 mm (5.2 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec981721551321061121201269111679132
Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.
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April Humidity in Knoxville

In Knoxville in April, humidity is 82%. With an average temperature of 15°C (59°F), this humidity feels like a heavy blanket wrapping around you, making outdoor activities feel sticky and uncomfortable for travelers.

April Average Humidity in Knoxville

This chart illustrates the average monthly humidity levels in Knoxville, 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 Knoxville is approximately 82%, 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 April generated using information from the Copernicus Climate Change Service.

April UV Index in Knoxville

In Knoxville 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 Knoxville.

Maximum UV Index Levels in Knoxville for April

The chart shows the monthly maximum UV Index (UVI) for Knoxville 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 Knoxville typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec36810111111109753
Data source: Knoxville 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 Knoxville Compares to Other Months

Weather in Knoxville varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Knoxville, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Knoxville, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)98 mm (3.9 inches)86%moderate
February Weather8°C (46°F)172 mm (6.8 inches)86%high
March Weather11°C (52°F)155 mm (6.1 inches)86%very high
April Weather15°C (59°F)132 mm (5.2 inches)82%very high
May Weather21°C (69°F)106 mm (4.2 inches)85%extreme
June Weather24°C (75°F)112 mm (4.4 inches)85%extreme
July Weather26°C (79°F)120 mm (4.7 inches)83%extreme
August Weather25°C (78°F)126 mm (5.0 inches)76%very high
September Weather23°C (74°F)91 mm (3.6 inches)76%very high
October Weather17°C (63°F)116 mm (4.6 inches)80%high
November Weather9°C (49°F)79 mm (3.1 inches)88%moderate
December Weather7°C (45°F)132 mm (5.2 inches)88%moderate

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