Indianapolis

Indiana Weather in August

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

Planning a journey to Indiana, the United States of America this August and curious over the weather conditions to await? Your essential details are found on this page, answering your query:

What to Expect in Indiana in August

Indiana, the United States of America is a region in the United States of America. August in Indiana generally has temperatures that range from warm to very warm, with precipitation levels ranging from moderate to high. The month of August is in the summer season.

Temperatures

Based on our climate data spanning from 1990-2020, the average maximum temperature is warm in Michigan City at 27°C (81°F) to very warm in Evansville at 32°C (90°F). Nighttime temperatures generally drop to 20°C (68°F) in Evansville and 17°C (63°F) in Michigan City. While the given temperatures for day and night are typical, there may be days that feel warmer. Make sure you're dressed in a way that keeps you cool and comfortable.

For a closer look at conditions across Indiana, the United States of America, refer to the map below.

Precipitation

In August, precipitation varies across different areas. From moderate rainfall in Tell City with an average of 60 mm (2.4 in) to high rainfall in Valparaiso with 156 mm (6.1 in).

Average sunshine

Plenty of sunshine can be expected in numerous places in August. Indianapolis typically receives 275 hours of sunlight, making it ideal for those seeking sunny weather.

Explore Indiana by month

Best Places to Visit in Indiana in August

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

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 August for some of the most popular destinations in Indiana, the United States of America?

Temperature range in Indiana (August)

Precipitation variation in Indiana (August)

Indianapolis

In August Indianapolis generally has high temperatures with maximum daytime temperatures around 29°C (84°F), minimum nighttime temperatures around 18°C (64°F) and moderate monthly rainfall. So on average the conditions are perfect that month.

July
August
September
Max temperature
29°C (84°F)
29°C (84°F)
26°C (79°F)
Min temperature
19°C (66°F)
18°C (64°F)
14°C (57°F)
Monthly sun hours
297 hours
275 hours
235 hours
Monthly rainfall
111 mm (4.4 in)
81 mm (3.2 in)
85 mm (3.3 in)
Monthly rainy days
12 days
10 days
10 days
Weather conditions

Merrillville

In August Merrillville generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 17°C (63°F) and high monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
29°C (84°F)
28°C (82°F)
25°C (77°F)
Min temperature
18°C (64°F)
17°C (63°F)
13°C (55°F)
Monthly sun hours
319 hours
280 hours
226 hours
Monthly rainfall
110 mm (4.3 in)
146 mm (5.7 in)
111 mm (4.4 in)
Monthly rainy days
11 days
11 days
9 days
Weather conditions

Michigan City

In August Michigan City generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 17°C (63°F) and high monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
27°C (81°F)
27°C (81°F)
23°C (73°F)
Min temperature
18°C (64°F)
17°C (63°F)
13°C (55°F)
Monthly sun hours
309 hours
301 hours
240 hours
Monthly rainfall
118 mm (4.6 in)
120 mm (4.7 in)
102 mm (4 in)
Monthly rainy days
11 days
12 days
10 days
Weather conditions

Portage

In August Portage generally has high temperatures with maximum daytime temperatures around 27°C (81°F), minimum nighttime temperatures around 17°C (63°F) and high monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
28°C (82°F)
27°C (81°F)
24°C (75°F)
Min temperature
18°C (64°F)
17°C (63°F)
13°C (55°F)
Monthly rainfall
114 mm (4.5 in)
135 mm (5.3 in)
112 mm (4.4 in)
Monthly rainy days
11 days
11 days
10 days
Weather conditions

Hammond

In August Hammond generally has high temperatures with maximum daytime temperatures around 28°C (82°F), minimum nighttime temperatures around 18°C (64°F) and high monthly rainfall. So on average the conditions are pleasant that month.

July
August
September
Max temperature
29°C (84°F)
28°C (82°F)
24°C (75°F)
Min temperature
19°C (66°F)
18°C (64°F)
14°C (57°F)
Monthly sun hours
319 hours
280 hours
226 hours
Monthly rainfall
108 mm (4.3 in)
120 mm (4.7 in)
100 mm (3.9 in)
Monthly rainy days
11 days
11 days
9 days
Weather conditions

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

Popular cities in August

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

City Weather Day temp Night temp Rainfall
Indianapolis 29°C (84°F) 18°C (64°F) 81 mm (3.2 in)
Merrillville 28°C (82°F) 17°C (63°F) 146 mm (5.7 in)
Michigan City 27°C (81°F) 17°C (63°F) 120 mm (4.7 in)
Portage 27°C (81°F) 17°C (63°F) 135 mm (5.3 in)
Hammond 28°C (82°F) 18°C (64°F) 120 mm (4.7 in)
Valparaiso 27°C (81°F) 16°C (61°F) 156 mm (6.1 in)

Indiana weather in August: frequently asked questions

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

August in Indiana, the United States of America brings perfect weather. In Indianapolis, daytime temperatures are typically around 29°C (84°F) and nighttime lows hover near 18°C (64°F).

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

Indianapolis averages a daytime maximum of 29°C (84°F) in August, with overnight lows close to 18°C (64°F).

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

August is on the drier side in Indiana, the United States of America. Indianapolis averages only about 81 mm (3.2 in), with most days staying dry.

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

We consider August to be one of the best times to travel to Indiana, the United States of America. Typically, the climate in Indianapolis is perfect. 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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