Weather in September 2025

Knoxville weather in September 2025

The temperatures in Knoxville in September are comfortable with low of 12°C and and high up to 26°C.

You can expect about 3 to 8 days of rain in Knoxville during the month of September. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.

Our weather forecast can give you a great sense of what weather to expect in Knoxville in September 2025.

If you’re planning to visit Knoxville in the near future, we highly recommend that you review the 14 day weather forecast for Knoxville before you arrive.

Temperatures
Temperatures
26° / 12°
Rainy Days
Rainy Days
6
Snowy Days
Snowy Days
0
Dry Days
Dry Days
24
Rainfall
Rainfall
155
mm
10.8
Sun Hours
10.8
Hrs

Knoxville annual weather

Month Temperatures Rainy Days Dry Days Snowy Days Rainfall Weather More details
January 7° / -4° 9 13 10 165 mm
Awful
February 9° / -1° 10 10 8 179 mm
Awful
March 14° / 3° 10 17 4 178 mm
Bad
April 19° / 6° 10 19 1 169 mm
Ok
May 24° / 10° 9 22 0 156 mm
Good
June 28° / 13° 10 20 0 164 mm
Good
July 30° / 15° 11 20 0 222 mm
Ok
August 29° / 14° 8 23 0 158 mm
Ok
September 26° / 12° 6 24 0 155 mm
Perfect
October 20° / 7° 6 25 1 126 mm
Good
November 14° / 2° 6 22 2 138 mm
Ok
December 10° / 0° 8 18 5 183 mm
Awful
Temperatures in Knoxville in September
Rain in Knoxville in September

Recommended Hotels in Knoxville

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Weather in Knoxville in September - FAQ

What is the average temperature in Knoxville in September?
The average temperature in Knoxville in September is 12/26° C.
What is the chance of rain in Knoxville in September?
On average, there are 6 rainy days in Knoxville during September.
Weather wise, is September a good time to visit Knoxville?
The weather in Knoxville in September is perfect.
Can it snow in Knoxville in September?
On average, there are 0 snowy days in Knoxville in September.
More about the weather in Knoxville