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

Wondering what the weather is like in Merrillville during September? Curious if the timing is right for your trip? Our page offers an in-depth look at the monthly weather conditions.

Temperatures

Typically, September in Merrillville includes high temperatures and high rainfall. Anticipate daytime temperatures around 25°C, while night temperatures can drop to 13°C.

Precipitation

Merrillville in September usually receives high rainfall, averaging around 111 mm for the month. This month experiences about 9 days of rain according to historical data.

Average sunshine

The days are predominantly sunny, with an estimated total of around 226 hours of sunshine. These sun-filled days are perfect for spending time outside. Whether it's playing sports, visiting a park, or going for a bike ride.

If you're a fan of comfortable temperatures and drier conditions, September is a great time to visit. May, June, July, August and September generally stand 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 Merrillville climate page with graphs.

 

Merrillville, monthly averages in September

Min Temperature 13°C  

Max Temperature 25°C  

Chance of Rain 30%  

Precipitation 111 mm  

Rainy days 9 days  

Humidity 71% *  

Sunshine 226 hours *  

Percentage Sunshine 60% *  

Data from: Chicago, the United States of America (72 KM, 45 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 Merrillville, 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

Camping

6/10

Outdoor sports

9/10

Interested in more climate information?

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

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.