Great Smoky Mountains National Park weather in September (United States of America)

What can you expect from the weather in Great Smoky Mountains National Park during September? This guide provides all the details you need.

In September, Great Smoky Mountains National Park generally has high temperatures and high rainfall. Daytime temperatures hover around 22°C, while nights can cool down to about 10°C.

Great Smoky Mountains National Park in September usually receives high rainfall, averaging around 136 mm for the month. Based on our climate data of the past 30 years, about 13 days of rain are anticipated.

With around 233 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If you favor pleasant temperatures and minimal rainfall, September is one of the better months to visit Great Smoky Mountains National Park. May, June, August and September typically offer the most agreeable circumstances. On the other hand, January, February, March, November and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Great Smoky Mountains National Park climate page with graphs.

 

Great Smoky Mountains National Park, monthly averages in September

Min Temperature 10°C  

Max Temperature 22°C  

Chance of Rain 43%  

Precipitation 136 mm  

Rainy days 13 days  

Humidity 76% *  

Sunshine 233 hours *  

Percentage Sunshine 62% *  

* Data from: Knoxville, the United States of America (54 KM, 34 Miles).

Where to go in the United States of America in September

Find out more about the weather in the United States of America in September and which places have the best weather conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in Great Smoky Mountains National Park in September?

For visitors traveling to Great Smoky Mountains National Park, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

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

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Interested in more climate information?

Weather and Climate provides you with all the information you need about the climate in Great Smoky Mountains National Park.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.