Knoxville Weather in September

September in Knoxville sees daytime temperatures around 28°C (82°F) and lows of 16°C (61°F) at night. With around 120 mm (4.7 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Knoxville in September

The climate data from previous years indicates about 9 days of rain, averaging 120 mm (4.7 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Knoxville in September

September in Knoxville sees highs of 28°C (82°F) and lows of 16°C (61°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Knoxville in September

The city usually sees around 233 hours of sunlight, indicating many sunny days — a great month for sightseeing.

For Knoxville itself, May and October generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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• January
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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 16°C (61°F)  

Max Temperature 28°C (82°F)  

Chance of Rain 31%  

Precipitation 120 mm (4.7 in)  

Rainy days 9 days  

Humidity 76%  

Sunshine 233 hours  

Percentage Sunshine 62%  

What to Wear in Knoxville in September

Warm but pleasant conditions in Knoxville in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

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

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

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.