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Weather in September in Indiana

Thinking about venturing to Indiana this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:

What is the weather like in Indiana in September?

Indiana is a region in the United States of America. September in Indiana generally has warm temperatures, with precipitation levels ranging from moderate to high.

Temperatures

The average maximum temperatures are warm and range from 23°C in Michigan City to 28°C in Evansville. Nighttime temperatures generally drop to 16°C in Evansville and 13°C in Michigan City.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Crawfordsville with an average of 72 mm to high rainfall in Dale with 125 mm.

Average sunshine

Meanwhile, Indianapolis enjoys close to 235 hours of sunlight. This means it's a great month if you prefer bright and sunny days.

For specific regional insights in Indiana for September, refer to the map provided below. For an in-depth overview of the yearly weather conditions, do visit our Indiana climate page.

Where to go in Indiana in September

Find more information for the most popular destinations in the Indiana on the map below. Click on a destination dot for more detailes.

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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).

Popular destinations

What is the weather like in September for the 5 most popular destinations in Indiana?

Indianapolis

In September Indianapolis generally has high temperatures with maximum daytime temperatures around 26°C, minimum nighttime temperatures around 14°C and moderate monthly rainfall. So on average the conditions are perfect that month.

Indianapolis
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
29°C 
18°C 
275 hours 
81 mm 
10 days 
26°C 
14°C 
235 hours 
85 mm 
10 days 
October   >> October
>>  
18°C 
7°C 
200 hours 
90 mm 
11 days 
Climate in Indianapolis

Merrillville

In September Merrillville generally has high temperatures with maximum daytime temperatures around 25°C, minimum nighttime temperatures around 13°C and high monthly rainfall. So on average the conditions are pleasant that month.

Merrillville
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
28°C 
17°C 
280 hours 
146 mm 
11 days 
25°C 
13°C 
226 hours 
111 mm 
9 days 
October   >> October
>>  
17°C 
6°C 
195 hours 
94 mm 
12 days 
Climate in Merrillville

Michigan City

In September Michigan City generally has high temperatures with maximum daytime temperatures around 23°C, minimum nighttime temperatures around 13°C and high monthly rainfall. So on average the conditions are pleasant that month.

Michigan City
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
27°C 
17°C 
301 hours 
120 mm 
12 days 
23°C 
13°C 
240 hours 
102 mm 
10 days 
October   >> October
>>  
16°C 
7°C 
205 hours 
97 mm 
14 days 
Climate in Michigan City

Hammond

In September Hammond generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 14°C and moderate monthly rainfall. So on average the conditions are pleasant that month.

Hammond
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
sun hoursMonthly sun hours sun hoursSun hours
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
28°C 
18°C 
280 hours 
120 mm 
11 days 
24°C 
14°C 
226 hours 
100 mm 
9 days 
October   >> October
>>  
17°C 
7°C 
195 hours 
91 mm 
12 days 
Climate in Hammond

Portage

In September Portage generally has high temperatures with maximum daytime temperatures around 24°C, minimum nighttime temperatures around 13°C and high monthly rainfall. So on average the conditions are pleasant that month.

Portage
minimum temparatureMax temperature minimum temparatureMax temp
maximum temparatureMin temperature maximum temparatureMin temp
precipitationMonthly rainfall precipitationRainfall
rain daysMonthly rainy days rain daysRainy days
conditionsWeather conditions conditionsWeather
<<   August August
<<  
27°C 
17°C 
135 mm 
11 days 
24°C 
13°C 
112 mm 
10 days 
October   >> October
>>  
17°C 
7°C 
98 mm 
13 days 
Climate in Portage

Is your destination not in the list? Have a look at other destinations in Indiana, in the United States of America.

Is September the best time to visit Indiana?

We believe that September is one of the best times to visit Indiana with overall perfect weather in Indianapolis. It's worth noting that weather conditions might differ depending on the location you visit.

Generally speaking, August and September provide perfect weather in Indianapolis. The weather in January, February and December, on the other hand, tends to be poor.

Interested in more climate information?

We have much more information about the climate in Indiana. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to the United States of America? Get detailed 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.