Indianapolis

Indiana Weather in September

Average temperatures, rainfall, sunshine and the best places to visit in Indiana, the United States of America in September.

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Indianapolis Merrillville Michigan City Portage

Planning a trip to Indiana, the United States of America this September? Here's what you need to know about the weather:

What to Expect in Indiana in September

Indiana, the United States of America 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 (73°F) in Michigan City to 28°C (82°F) in Evansville. Nighttime temperatures generally drop to 16°C (61°F) in Evansville and 13°C (55°F) in Michigan City.

For specific regional insights in Indiana, the United States of America, refer to the map provided below.

Precipitation

In September, precipitation varies across different areas. From moderate rainfall in Crawfordsville with an average of 72 mm (2.8 in) to high rainfall in Dale with 125 mm (4.9 in).

Average sunshine

Plenty of sunshine can be expected in numerous places in September. Indianapolis typically receives 235 hours of sunlight, making it ideal for those seeking sunny weather.

Explore Indiana by month

Pick a month to see the average temperature, rainfall and sunshine in Indiana — and find the best time to visit. (based on Indianapolis)

January2°C (36°F) February3°C (37°F) March11°C (52°F) April18°C (64°F) May23°C (73°F) June28°C (82°F) This monthJuly29°C (84°F) August29°C (84°F) September26°C (79°F) October18°C (64°F) November11°C (52°F) December5°C (41°F)
Best Time to Visit Indiana →

Best Places to Visit in Indiana in September

Click on a destination dot for more details. Toggle the map to compare temperatures or precipitation across Indiana.

Conditions Temperatures Precipitation
perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

Popular Destinations in Indiana

What is the weather like in September for some of the most popular destinations in Indiana, the United States of America?

Temperature range in Indiana (September)

Precipitation variation in Indiana (September)

Indianapolis

In September Indianapolis generally has high temperatures with maximum daytime temperatures around 26°C (79°F), minimum nighttime temperatures around 14°C (57°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

« August
September
October »
August
September
October
Max temperature
29°C (84°F)
26°C (79°F)
18°C (64°F)
Min temperature
18°C (64°F)
14°C (57°F)
7°C (45°F)
Monthly sun hours
275 hours
235 hours
200 hours
Monthly rainfall
81 mm (3.2 in)
85 mm (3.3 in)
90 mm (3.5 in)
Monthly rainy days
10 days
10 days
11 days
Weather conditions
perfect
perfect
pleasant
Climate in Indianapolis →

Merrillville

In September Merrillville generally has high temperatures with maximum daytime temperatures around 25°C (77°F), minimum nighttime temperatures around 13°C (55°F) and high monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
25°C (77°F)
17°C (63°F)
Min temperature
17°C (63°F)
13°C (55°F)
6°C (43°F)
Monthly sun hours
280 hours
226 hours
195 hours
Monthly rainfall
146 mm (5.7 in)
111 mm (4.4 in)
94 mm (3.7 in)
Monthly rainy days
11 days
9 days
12 days
Weather conditions
pleasant
pleasant
tolerable
Climate in Merrillville →

Michigan City

In September Michigan City generally has high temperatures with maximum daytime temperatures around 23°C (73°F), minimum nighttime temperatures around 13°C (55°F) and high monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
27°C (81°F)
23°C (73°F)
16°C (61°F)
Min temperature
17°C (63°F)
13°C (55°F)
7°C (45°F)
Monthly sun hours
301 hours
240 hours
205 hours
Monthly rainfall
120 mm (4.7 in)
102 mm (4 in)
97 mm (3.8 in)
Monthly rainy days
12 days
10 days
14 days
Weather conditions
pleasant
pleasant
tolerable
Climate in Michigan City →

Portage

In September Portage generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 13°C (55°F) and high monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
27°C (81°F)
24°C (75°F)
17°C (63°F)
Min temperature
17°C (63°F)
13°C (55°F)
7°C (45°F)
Monthly rainfall
135 mm (5.3 in)
112 mm (4.4 in)
98 mm (3.9 in)
Monthly rainy days
11 days
10 days
13 days
Weather conditions
pleasant
pleasant
tolerable
Climate in Portage →

Hammond

In September Hammond generally has high temperatures with maximum daytime temperatures around 24°C (75°F), minimum nighttime temperatures around 14°C (57°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

« August
September
October »
August
September
October
Max temperature
28°C (82°F)
24°C (75°F)
17°C (63°F)
Min temperature
18°C (64°F)
14°C (57°F)
7°C (45°F)
Monthly sun hours
280 hours
226 hours
195 hours
Monthly rainfall
120 mm (4.7 in)
100 mm (3.9 in)
91 mm (3.6 in)
Monthly rainy days
11 days
9 days
12 days
Weather conditions
pleasant
pleasant
tolerable
Climate in Hammond →

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

Popular cities in September

Day & night temperatures, rainfall and average weather in Indiana in September.

City Weather Day temp Night temp Rainfall
Indianapolis 26°C (79°F) 14°C (57°F) 85 mm (3.3 in)
Merrillville 25°C (77°F) 13°C (55°F) 111 mm (4.4 in)
Michigan City 23°C (73°F) 13°C (55°F) 102 mm (4 in)
Portage 24°C (75°F) 13°C (55°F) 112 mm (4.4 in)
Hammond 24°C (75°F) 14°C (57°F) 100 mm (3.9 in)
Valparaiso 24°C (75°F) 12°C (54°F) 104 mm (4.1 in)

Indiana weather in September: frequently asked questions

What is the weather like in Indiana, the United States of America in September?

Expect perfect weather across Indiana, the United States of America in September. The popular destination of Indianapolis averages 26°C (79°F) by day and 14°C (57°F) at night during this month.

What is the average temperature in Indiana, the United States of America in September?

Daytime temperatures in Indianapolis peak at roughly 26°C (79°F) in September, dropping to about 14°C (57°F) overnight.

Does Indiana, the United States of America get a lot of rain in September?

September is on the drier side in Indiana, the United States of America. Indianapolis averages only about 85 mm (3.3 in), with most days staying dry.

Is September a Good Time to Visit Indiana, the United States of America?

We believe that September is one of the best times to visit Indiana, the United States of America 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.

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.

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