July Weather in Knoxville, United States

Last updated: June 24, 2025

In July, the average temperature in Knoxville, United States hovers around 25°C (78°F), making it a pleasantly warm destination. Expect a range from a cool 14°C (57°F) to a sweltering 37°C (99°F). However, be prepared for some rain, with an average precipitation of 77 mm (3.0 in) over approximately 9 days. With an average humidity of 81%, it’s the perfect time to embrace the warmth and enjoy the vibrant atmosphere!

July Temperature in Knoxville

In July in Knoxville, the average temperature is 25°C (78°F). Maximums can reach 37°C (99°F), and minimums can be as low as 14°C (57°F). Be prepared for warm days and cooler evenings when traveling to Knoxville during this time.

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

The chart illustrates July 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, July typically has an average temperature of 25°C (78°F), with highs reaching up to 37°C (99°F) and lows dropping to around 14°C (57°F).

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

July Precipitation in Knoxville

In Knoxville in July, the precipitation amount is 77 mm (3.0 in) over the course of 9 days.

July Precipitation Trends in Knoxville

The chart displays monthly precipitation patterns in Knoxville, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Knoxville, July typically receives around 77 mm (3.0 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

July Humidity in Knoxville

In Knoxville in July humidity is 81%. With an average temperature of 25°C (78°F), this humidity feels like a warm, heavy blanket enveloping you, making outdoor activities less comfortable and requiring frequent breaks to stay hydrated.

July Average Humidity in Knoxville

This chart illustrates the average monthly humidity levels in Knoxville, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Knoxville is approximately 81%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for July generated using information from the Copernicus Climate Change Service.

July UV Index in Knoxville

In Knoxville in July, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Knoxville.

Maximum UV Index Levels in Knoxville for July

The chart shows the monthly maximum UV Index (UVI) for Knoxville in July, 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 July, the maximum UV index in Knoxville typically reaches 11, which falls under the extreme exposure category.

Data source: Knoxville July 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 July 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 July’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 July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (24°F)	44 mm (1.7 inches)	78%	moderate
February Weather	-4°C (25°F)	47 mm (1.8 inches)	80%	moderate
March Weather	5°C (41°F)	86 mm (3.4 inches)	77%	high
April Weather	10°C (50°F)	71 mm (2.8 inches)	77%	very high
May Weather	17°C (63°F)	153 mm (6.0 inches)	77%	very high
June Weather	24°C (75°F)	129 mm (5.1 inches)	81%	extreme
July Weather	25°C (78°F)	77 mm (3.0 inches)	81%	extreme
August Weather	24°C (75°F)	71 mm (2.8 inches)	77%	very high
September Weather	21°C (69°F)	121 mm (4.8 inches)	73%	very high
October Weather	12°C (54°F)	130 mm (5.1 inches)	75%	high
November Weather	4°C (40°F)	50 mm (2.0 inches)	85%	moderate
December Weather	0°C (32°F)	37 mm (1.5 inches)	83%	moderate