October weather forecast
Indianapolis, IN

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The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape
The magnificent Monument Circle in Indianapolis, Indiana with the surrounding cityscape

Weather in October

October in Indianapolis carries the essence of autumn, an intermediate period between the warm summer and brisk winter. As temperatures moderate, falling to an average low of 47.3°F (8.5°C), the city is imbued with a refreshing chill. The crunch of fallen leaves underfoot and the beautiful hues of fall foliage mark the seasonal transition. October provides the city a beautiful blend of seasons, making it a perfect time for exploration.

Temperature

Onset of October witnesses a reduction in the average high-temperature, falling from a warm 75.9°F (24.4°C) in September to an enjoyable 63.1°F (17.3°C). Indianapolis records a mean low-temperature of 47.3°F (8.5°C) in October.

Humidity

The least humid month is October, with an average relative humidity of 73%.

Rainfall

In Indianapolis, in October, during 11.1 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In Indianapolis, during the entire year, the rain falls for 146.4 days and collects up to 21.14" (537mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in October is 11h and 8min.
On the first day of October in Indianapolis, sunrise is at 7:41 am and sunset at 7:26 pm. On the last day of the month, sunrise is at 8:13 am and sunset at 6:43 pm EDT.

Sunshine

In October, the average sunshine is 6.8h.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The maximum UV index of 2 during October leads to these instructions:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Experience reduced UV exposure by about half when donning a wide-brim hat. Be advised! The UV radiation from the Sun can be almost doubled due to the reflective properties of snow.
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Frequently asked questions

What is the average October temperature in Indianapolis?

During October, Indianapolis experiences an average high-temperature of 63.1°F (17.3°C) and a low-temperature of 47.3°F (8.5°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 86°F (30°C).

What is the least humid month in Indianapolis?

With an average relative humidity of 73%, October is the least humid month in Indianapolis, Indiana.

What is the average humidity in October in Indianapolis?

In Indianapolis, the average relative humidity in October is 73%.

How much does it rain in Indianapolis in October?

In Indianapolis, in October, during 11.1 rainfall days, 1.46" (37mm) of precipitation is typically accumulated.

When it does not snow in Indianapolis?

May through October are months without snowfall in Indianapolis.

Does it snow in Indianapolis in October?

In Indianapolis, Indiana, in October, it doesn't snow. In November, it regularly snows.

What is the average length of the day in October in Indianapolis?

The average day length in October in Indianapolis is 11h and 8min.

When are sunrise and sunset in October in Indianapolis?

In October, on the first day of the month, sunrise is at 7:41 am and sunset at 7:26 pm. On the last day of the month, in Indianapolis, sunrise is at 8:13 am and sunset at 6:43 pm EDT.

How many hours of sunshine does Indianapolis have in October?

The average sunshine duration in October in Indianapolis is 6.8h.

What are the months with the lowest UV index in Indianapolis?

The months with the lowest UV index are January, February, October through December, with an average maximum UV index of 2.

How high is the UV index in October in Indianapolis?

The average daily maximum UV index in October is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in October
Indianapolis, IN

Average temperature in October - Indianapolis, IN
  • Average high temperature in October: 63.1°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in October: 47.3°F

The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).

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Average pressure in October
Indianapolis, IN

Average pressure in October - Indianapolis, IN
  • Average pressure in October: 30.03"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in October
Indianapolis, IN

Average wind speed in October - Indianapolis, IN
  • Average wind speed in October: 8.4mph

The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in October
Indianapolis, IN

Average humidity in October - Indianapolis, IN
  • Average humidity in October: 73%

The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in October
Indianapolis, IN

Average rainfall in October - Indianapolis, IN
  • Average rainfall in October: 1.46"

The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.22").

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Average rainfall days in October
Indianapolis, IN

Average rainfall days in October - Indianapolis, IN
  • Average rainfall days in October: 11.1 days

The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.8 days).

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Average snowfall in October
Indianapolis, IN

Average snowfall in October - Indianapolis, IN
  • Average snowfall in October: 0"

The month with the highest snowfall is December (2.28").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in October
Indianapolis, IN

Average snowfall days in October - Indianapolis, IN
  • Average snowfall days in October: 0.2 days

The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in October /
Average sunshine in October
Indianapolis, IN

Average daylight in October / Average sunshine in October - Indianapolis, IN
  • Average daylight in October: 11h and 1min

The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in October: 6h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in October
Indianapolis, IN

Average sunshine days in October - Indianapolis, IN
  • Average sunshine days in October: 18.6 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is May (11.1 days).

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Average UV index in October
Indianapolis, IN

Average UV index in October - Indianapolis, IN
  • Average UV index in October: 2

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

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Average cloud cover in October
Indianapolis, IN

Average cloud cover in October - Indianapolis, IN
  • Average cloud cover in October: 36

The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in October
Indianapolis, IN

Average visibility in October - Indianapolis, IN
  • Average visibility in October: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Indianapolis, Indiana, USA

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