Knoxville weather in September 2026

Q: How hot is it in Knoxville in September?

Daytime temperatures usually reach 27°C in Knoxville in September with low heat and humidity, falling to 15°C at night.

Q: How sunny is it in Knoxville in September?

There are normally 8 hours of bright sunshine each day in Knoxville in September - that's 61% of daylight hours.

Q: Does it rain in Knoxville in September?

There are usually 8 days with some rain in Knoxville in September and the average monthly rainfall is 81mm.

Q: What is the chance of a cyclone in Knoxville in September?

On average less than 1 day in September in Knoxville is likely to be affected by the passage of one or more tropical storms.

Expect daytime maximum temperatures of 81°F in Knoxville, Tennessee in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 3.2 inches of rainfall in the month.

81
81°F max day temperature
8
8 hours of sunshine per day
8
8 days with some rainfall
59
59°F min night temperature
12
12 hours of daylight per day
L
Low heat & humidity
3.2
3.2 inches of monthly rainfall
8
8 (Very High) UV index

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The September weather guide for Tennessee (Knoxville) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)

More about the USA

How hot is it in Knoxville in September?

Daytime temperatures usually reach 81°F in Knoxville in September with low heat and humidity, falling to 59°F at night.

How sunny is it in Knoxville in September?

There are normally 8 hours of bright sunshine each day in Knoxville in September - that's 61% of daylight hours.

Does it rain in Knoxville in September?

There are usually 8 days with some rain in Knoxville in September and the average monthly rainfall is 3.2 inches.

What is the chance of a hurricane in Knoxville in September?

On average less than 1 day in September in Knoxville is likely to be affected by the passage of one or more tropical storms.

Knoxville September sunrise & sunset times

Browse the sunrise and sunset times for Knoxville in September 2026. Select a month to view Knoxville sunrise and sunset times for the next 12 months.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Date	Sunrise times	Sunset times
Tuesday, 1st September 2026	06:08	19:03
Tuesday, 15th September 2026	06:18	18:43
Wednesday, 30th September 2026	06:30	18:21

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Tennessee - quick facts
Flight time^✝	9 hours
Time difference	UK -5 to -6 hours
Language(s)	English
Currency	US Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes
Why visit?	Culture
Tourist info	Tennessee Department of Tourist Development