Knoxville Weather in September

September in Knoxville brings high temperatures, with highs of 25°C (77°F) and nights dropping to 13°C (55°F). Rainfall is on the higher side this month, averaging around 82 mm (3.2 in), so keep a rain jacket handy.

Rainfall in Knoxville in September

Records from the past 30 years suggest around 8 days of rain, with 82 mm (3.2 in) average for the month. When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Knoxville in September

September is one of the better months to visit Knoxville. Expect 25°C (77°F) during the day and 13°C (55°F) at night. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Knoxville in September

Expect a lot of sunshine this month, with about 240 hours of sun. These sunny conditions add to the overall experience.

If you're inclined towards comfortable temperatures and drier conditions, September is a good time to visit Knoxville.

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• January
• February
• March
• April

• May
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• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Knoxville's climate page.

Knoxville Temperature in September

Min Temperature 13°C (55°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 28%  

Precipitation 82 mm (3.2 in)  

Rainy days 8 days  

Humidity 65% *  

Sunshine 240 hours *  

Percentage Sunshine 64% *  

* Data from: Des Moines, the United States of America (50 KM, 31 Miles).

What to Wear in Knoxville in September

For Knoxville in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.

What To Do in Knoxville in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Knoxville's climate page.

More climate data for Knoxville

Temperature Rainfall Sunshine Humidity

See the full Knoxville climate overview or explore weather in the United States of America.