Weather in September in Knoxville, Tn

< September >
	Normal Max/ High Temperature	27°C (81°F)
	Average Temperature	21°C (70°F)
	Min/ Low Temperature	15°C (59°F)
	Normal Precipitation	78mm (3.1in)
	Average Daylight per day	12h 22'
	Sun altitude at solar noon on the 21st day.	54.7°

• The average temperature in Knoxville, Tn in September is warm at 21.2 °C (70.16 °F).
• Afternoons can be hot with average high temperatures reaching 27.3 °C (81.1 °F).
• Overnight temperatures are generally mild with an average low of 15 °C (59 °F).
• The range/ variation of diurnal average temperatures in September is 12.3 °C (22.1 °F).
• Precipitation averages for September are moderate with 78mm (3.1 in) recorded.
• The shortest day is 11h 48' long and the longest day is 12h 55' long with an average length of 12h 22'.

Weather Trend Graph for September in Knoxville, Tn, Usa