Indianapolis weather in September (Indiana, United States of America)

Will it be rainy or sunny in Indianapolis this September? Is now the perfect time to visit? Find all the weather insights for this month on this page.

Temperatures

During September, Indianapolis experiences perfect weather, with high temperatures and moderate rainfall. During the day, temperatures can climb to about 26°C. At night, they may fall to a cooler 14°C.

Precipitation

Indianapolis in September usually receives moderate rainfall, averaging around 85 mm for the month. According to historical climate patterns, there are usually around 10 days days of rain.

Average sunshine

There are approximately 235 hours of sunshine this month, meaning plenty of sunny days and a vibrant atmosphere.

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

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

 

Indianapolis, monthly averages in September

Min Temperature 14°C  

Max Temperature 26°C  

Chance of Rain 33%  

Precipitation 85 mm  

Rainy days 10 days  

Humidity 75%  

Sunshine 235 hours  

Percentage Sunshine 62%  

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?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.

What To Do

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

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

8/10

Outdoor sports

7/10

Interested in more climate information?

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

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.