April Weather in Knoxville, United States

Last updated: June 24, 2025

In April, the average temperature in Knoxville, United States is a cool 10°C (50°F). Expect a temperature range with lows dipping to -9°C (17°F) and highs soaring to 28°C (84°F). Precipitation is fairly significant, totaling 111 mm (4.4 in) over 11 days. The air is notably humid, with an average humidity level of 82%, making for a refreshing yet brisk atmosphere.

April Temperature in Knoxville

In April in Knoxville, the average temperature is 10°C (50°F). Maximum temperatures can reach 28°C (84°F), while minimums can drop as low as -9°C (17°F). Be prepared for a wide range of temperatures when traveling during this month.

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 10°C (50°F), with highs reaching up to 28°C (84°F) and lows dropping to around -9°C (17°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 111 mm (4.4 in), occurring over the course 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 111 mm (4.4 inches) of precipitation spread over approximately 11 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 82%. With an average temperature of 10°C (50°F), this humidity feels like a dense, heavy blanket wrapping around you, making every step feel sluggish and the air thick, which can make traveling quite uncomfortable.

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.

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 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 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 8, 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	-4°C (26°F)	57 mm (2.2 inches)	81%	moderate
February Weather	-2°C (28°F)	65 mm (2.6 inches)	81%	moderate
March Weather	5°C (41°F)	105 mm (4.1 inches)	81%	high
April Weather	10°C (50°F)	111 mm (4.4 inches)	82%	very high
May Weather	17°C (63°F)	160 mm (6.3 inches)	78%	very high
June Weather	23°C (74°F)	152 mm (6.0 inches)	81%	extreme
July Weather	25°C (77°F)	108 mm (4.2 inches)	79%	very high
August Weather	23°C (74°F)	67 mm (2.6 inches)	77%	very high
September Weather	20°C (69°F)	99 mm (3.9 inches)	78%	very high
October Weather	13°C (55°F)	126 mm (5.0 inches)	78%	high
November Weather	4°C (40°F)	52 mm (2.1 inches)	87%	moderate
December Weather	1°C (33°F)	50 mm (2.0 inches)	84%	low