Indianapolis weather in October: Indianapolis, Indiana: normal highs, lows, rain and records for October
Indianapolis in October has a normal high of 66°F and a normal low of 46°F, a daily mean of 56°F, falling from 72°F on the 1st to 59°F by the 31st. Measurable precipitation falls on 9 days in a normal October, 3.22 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 19°C and low of 8°C, 82 mm of precipitation and 0 cm of snow in October.
- NOAA stationIndianapolis International Airport
- Station IDUSW00093819
- Location39.71°N 86.28°W
- Elevation790 ft (241 m)
- From the center9 miles
- Population891,484
- Jan 36° 21°
- Feb 41° 24°
- Mar 52° 33°
- Apr 64° 43°
- May 73° 54°
- Jun 82° 63°
- Jul 85° 66°
- Aug 84° 65°
- Sep 78° 57°
- Oct 66° 46°
- Nov 52° 35°
- Dec 40° 26°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Indianapolis in October?
The normal high is 66°F and the normal low 46°F, for a daily mean of 55.5°F. October is 12.3°F cooler than September and 12.2°F warmer than November. October is the 6th warmest month of the year in Indianapolis and the 7th wettest. Across the month the normal high falls 13°F, from 72°F on October 1 to 59°F on October 31. From one year to the next October's mean temperature typically moves about 2.4°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 53°F and 58°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 32%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 72°F | 51°F | 27% | 17% |
| October 8 | 69°F | 48°F | 28% | 18% |
| October 15 | 66°F | 46°F | 29% | 18% |
| October 22 | 63°F | 43°F | 30% | 18% |
| October 31 | 59°F | 40°F | 32% | 18% |
Every day of October: normal high, low and chance of precipitation (warmest afternoon October 1, coldest night October 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| October 1 | 72°F | 51°F | 27% | 17% | 11 h 50 min |
| October 2 | 72°F | 51°F | 27% | 17% | 11 h 50 min |
| October 3 | 71°F | 50°F | 27% | 17% | 11 h 40 min |
| October 4 | 71°F | 50°F | 27% | 17% | 11 h 40 min |
| October 5 | 71°F | 50°F | 27% | 17% | 11 h 40 min |
| October 6 | 70°F | 49°F | 27% | 17% | 11 h 40 min |
| October 7 | 70°F | 49°F | 28% | 17% | 11 h 30 min |
| October 8 | 69°F | 48°F | 28% | 18% | 11 h 30 min |
| October 9 | 69°F | 48°F | 28% | 18% | 11 h 30 min |
| October 10 | 68°F | 48°F | 28% | 18% | 11 h 30 min |
| October 11 | 68°F | 47°F | 28% | 18% | 11 h 20 min |
| October 12 | 67°F | 47°F | 28% | 18% | 11 h 20 min |
| October 13 | 67°F | 47°F | 29% | 18% | 11 h 20 min |
| October 14 | 67°F | 46°F | 29% | 18% | 11 h 20 min |
| October 15 | 66°F | 46°F | 29% | 18% | 11 h 10 min |
| October 16 | 66°F | 45°F | 29% | 18% | 11 h 10 min |
| October 17 | 65°F | 45°F | 29% | 18% | 11 h 10 min |
| October 18 | 65°F | 45°F | 29% | 18% | 11 h 10 min |
| October 19 | 64°F | 44°F | 30% | 18% | 11 h |
| October 20 | 64°F | 44°F | 30% | 18% | 11 h |
| October 21 | 63°F | 44°F | 30% | 18% | 11 h |
| October 22 | 63°F | 43°F | 30% | 18% | 11 h |
| October 23 | 63°F | 43°F | 30% | 18% | 10 h 50 min |
| October 24 | 62°F | 43°F | 30% | 18% | 10 h 50 min |
| October 25 | 62°F | 42°F | 31% | 18% | 10 h 50 min |
| October 26 | 61°F | 42°F | 31% | 18% | 10 h 50 min |
| October 27 | 61°F | 42°F | 31% | 18% | 10 h 40 min |
| October 28 | 60°F | 41°F | 31% | 18% | 10 h 40 min |
| October 29 | 60°F | 41°F | 31% | 18% | 10 h 40 min |
| October 30 | 59°F | 41°F | 31% | 18% | 10 h 40 min |
| October 31 | 59°F | 40°F | 32% | 18% | 10 h 30 min |
- Normal high
- 66°FOctober average
- Normal low
- 46°FOctober average
- Precipitation
- 3.22 inmonth total
- Days with precipitation
- 90.01 inch or more
- Snowfall
- 0.1 inmonth total
- Nights at 32°F or colder
- 2
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 11
- Days at 80°F or more
- 3
- Sunshine
- 73%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00093819; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Indianapolis in October?
On a given October day the chance of 0.01 inch or more is 29% on average, highest around October 31 (32%). In all, 3.22 in falls on 9 days of a normal October, 1 of them with an inch or more.
In a normal October in Indianapolis, 2 nights fall to freezing and snowfall averages 0.1 inches.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00093819.
How humid and windy is Indianapolis in October?
At 3 p.m. the normal temperature is 56°F with 54% relative humidity and a dew point of 40°F; at 6 a.m. it is 44°F with 81% humidity. The wind averages 9.8 mph, most often from the west-southwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 44°F | 38°F | 81% | 8.4 mph | 42% |
| 9 a.m. | 47°F | 40°F | 77% | 9.7 mph | 33% |
| noon | 54°F | 40°F | 60% | 11.8 mph | 28% |
| 3 p.m. | 56°F | 40°F | 54% | 12.1 mph | 26% |
| 6 p.m. | 52°F | 39°F | 60% | 9.6 mph | – |
| 9 p.m. | 49°F | 39°F | 68% | 9.1 mph | 37% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00093819. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for October in Indianapolis?
The warmest October temperature on Indianapolis's official record (since 1871) is 92°F, on October 2, 2019; the coldest is 20°F, on October 26, 1962. The wettest October brought 8.98 in (1919); the snowiest, 9.3 inches (1989).
The October mean against the 1991-2020 normal of 55.5°F: 2021 60.9°F (+5.4), 2022 54.5°F (−1.0), 2023 57.5°F (+2.0), 2024 60.0°F (+4.5), 2025 59.2°F (+3.7). 4 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.9°F | +5.4°F | 7.74 in |
| 2022 | 54.5°F | −1.0°F | 1.42 in |
| 2023 | 57.5°F | +2.0°F | 2.47 in |
| 2024 | 60.0°F | +4.5°F | 0.60 in |
| 2025 | 59.2°F | +3.7°F | 1.97 in |
Source: records: ACIS, NWS threaded record INDthr; recent months: ACIS, station USW00093819. Records and recent months use complete months only.
How does October in Indianapolis compare across Indiana?
Across the 99 places PlainClimate covers in Indiana, October normal highs run from 61°F in Angola to 71°F in St. Meinrad; Indianapolis's is 66°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Indianapolis in September78°F by day, 57°F at night
- Indianapolis in November52°F by day, 35°F at night
- Indianapolis through the yearEvery month, frost dates, records and recent years
- Indiana in OctoberThe statewide normal and the warmest and coolest places
- St. Meinrad: Indiana's warmest Octobernormal high 71°F