Knoxville weather in September (Iowa, United States of America)

How's the weather trend in Knoxville as September approaches? This guide provides the necessary weather information for your travel plans.

Temperatures

Expect perfect weather in Knoxville during September, which means high temperatures and moderate rainfall. During the daylight hours, temperatures often reach 25°C. After dark they usually decrease to around 13°C.

Precipitation

Knoxville in September usually receives moderate rainfall, averaging around 82 mm for the month. On average, there are about 8 days with rain during this month.

Average sunshine

With around 240 hours of sunshine, the days are mostly sunny. It gives a pleasant and vibrant feel to the area.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. September generally stands out with the best circumstances. While January, February, March, November and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Knoxville climate page with graphs.

 

Knoxville, monthly averages in September

Min Temperature 13°C  

Max Temperature 25°C  

Chance of Rain 28%  

Precipitation 82 mm  

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).

Where to go in the United States of America in September

Find out more about the weather in the United States of America and which places have the best travel 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 this month?

For visitors traveling to Knoxville, 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.

Swimming

9/10

Cycling

9/10

Walking

9/10

Barbeque

8/10

Camping

8/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Knoxville.

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 travel conditions. Find out where to go with our weather planner.