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October Weather in Indianapolis, United States

Last updated: June 24, 2025

In October, the average temperature in Indianapolis, United States hovers around 14°C (58°F), but be prepared for a range that can dip to a minimum of -1°C (30°F) and soar to a maximum of 32°C (91°F). Precipitation is notable, with about 103 mm (4.0 in) falling over 11 days, making it a month where average humidity remains relatively high at 76%.

October Temperature in Indianapolis

In October in Indianapolis, the average temperature is 14°C (58°F). Maximums can reach 32°C (91°F), and minimums can be as low as -1°C (30°F). This wide range of temperatures can make your travel experience in Indianapolis quite varied, so be sure to pack accordingly!

October Weather in Indianapolis: Daily Temperature Highs, Lows, and Averages

The chart illustrates October temperature patterns in Indianapolis, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Indianapolis, October typically has an average temperature of 14°C (58°F), with highs reaching up to 32°C (91°F) and lows dropping to around -1°C (30°F).
JanFebMarAprMayJunJulAugSepOctNovDec303443526474777470584236
Data source: Temperature data for Indianapolis generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Indianapolis

In Indianapolis in October, the total precipitation amount is 103 mm (4.0 in), occurring over the course of 11 days.

October Precipitation Trends in Indianapolis

The chart displays monthly precipitation patterns in Indianapolis, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Indianapolis, October typically receives around 103 mm (4.0 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec829312794132107108101801039380
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
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October Humidity in Indianapolis

In Indianapolis in October humidity is 76%. With an average temperature of 14°C (58°F), this humidity feels like a warm, thick blanket wrapping around you, making outdoor activities feel sticky and draining, and prompting travelers to seek shade and stay hydrated often.

October Average Humidity in Indianapolis

This chart illustrates the average monthly humidity levels in Indianapolis, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Indianapolis is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%85%86%84%79%82%79%70%69%76%88%87%
Data source: Humidity data for October generated using information from the Copernicus Climate Change Service.

October UV Index in Indianapolis

In Indianapolis in October, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Indianapolis, you can refer to this Hourly UV Index in Indianapolis.

Maximum UV Index Levels in Indianapolis for October

The chart shows the monthly maximum UV Index (UVI) for Indianapolis in October, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In October, the maximum UV index in Indianapolis typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910111098643
Data source: Indianapolis October UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How October Weather in Indianapolis Compares to Other Months

Weather in Indianapolis varies notably across the year, with each month offering distinct climate conditions. This page compares October’s weather to other months in Indianapolis, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Indianapolis, showing how October’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)82 mm (3.2 inches)87%moderate
February Weather1°C (34°F)93 mm (3.7 inches)85%moderate
March Weather6°C (43°F)127 mm (5.0 inches)86%high
April Weather11°C (52°F)94 mm (3.7 inches)84%very high
May Weather18°C (65°F)132 mm (5.2 inches)79%very high
June Weather23°C (74°F)107 mm (4.2 inches)82%extreme
July Weather25°C (77°F)108 mm (4.2 inches)79%very high
August Weather23°C (74°F)101 mm (4.0 inches)70%very high
September Weather21°C (70°F)80 mm (3.2 inches)69%very high
October Weather14°C (58°F)103 mm (4.0 inches)76%high
November Weather5°C (42°F)93 mm (3.7 inches)88%moderate
December Weather2°C (36°F)80 mm (3.2 inches)87%moderate

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