April Weather in Knoxville, United States

Last updated: June 24, 2025

In April, the average temperature in Knoxville, United States hovers around 18°C (65°F). However, temperatures can range from a chilly 0°C (32°F) to a warm 33°C (92°F). With an average precipitation of 95 mm (3.8 in) spread over 8 days, you can expect some wet weather, and with an average humidity of 81%, the air can feel quite humid. Be prepared for a variety of conditions!

April Temperature in Knoxville

In April in Knoxville, the average temperature is 18°C (65°F). Maximums can reach 33°C (92°F), and minimums can be as low as 0°C (32°F). This variability makes Knoxville an interesting destination for travelers looking to experience a 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 18°C (65°F), with highs reaching up to 33°C (92°F) and lows dropping to around 0°C (32°F).

Data source: Temperature data for Knoxville generated using information from the Copernicus Climate Change Service.

April Precipitation in Knoxville

In Knoxville in April, the precipitation amount is 95 mm (3.8 in) accumulated over 8 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 95 mm (3.8 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Knoxville

In Knoxville in April, humidity is 81%. With an average temperature of 18°C (65°F), this humidity feels like a thick blanket wrapping around you, making every step feel heavier and the air thick and sultry—a challenging environment for traveling.

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 81%, offering insight into how humid the weather typically is during this month.

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.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (49°F)	110 mm (4.3 inches)	86%	moderate
February Weather	13°C (55°F)	119 mm (4.7 inches)	84%	high
March Weather	15°C (59°F)	80 mm (3.2 inches)	83%	very high
April Weather	18°C (65°F)	95 mm (3.8 inches)	81%	very high
May Weather	23°C (74°F)	83 mm (3.3 inches)	81%	extreme
June Weather	26°C (79°F)	113 mm (4.4 inches)	81%	extreme
July Weather	27°C (82°F)	95 mm (3.7 inches)	83%	extreme
August Weather	27°C (81°F)	118 mm (4.6 inches)	81%	extreme
September Weather	25°C (78°F)	96 mm (3.8 inches)	82%	very high
October Weather	21°C (69°F)	100 mm (3.9 inches)	78%	very high
November Weather	13°C (56°F)	76 mm (3.0 inches)	86%	high
December Weather	11°C (51°F)	121 mm (4.7 inches)	89%	moderate