Sioux Falls weather in October: Sioux Falls, South Dakota: normal highs, lows, rain and records for October
Sioux Falls in October has a normal high of 61°F and a normal low of 38°F, a daily mean of 50°F, falling from 69°F on the 1st to 53°F by the 31st. Measurable precipitation falls on 8 days in a normal October, 2.36 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 16°C and low of 3°C, 60 mm of precipitation and 4 cm of snow in October.
- NOAA stationSioux Falls Foss Field
- Station IDUSW00014944
- Location43.59°N 96.73°W
- Elevation1,430 ft (436 m)
- From the center3 miles
- Population209,289
- Jan 27° 9°
- Feb 32° 13°
- Mar 45° 24°
- Apr 59° 36°
- May 71° 48°
- Jun 81° 59°
- Jul 85° 63°
- Aug 83° 61°
- Sep 76° 52°
- Oct 61° 38°
- Nov 45° 25°
- Dec 32° 13°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sioux Falls in October?
The normal high is 61°F and the normal low 38°F, for a daily mean of 49.6°F. October is 14.2°F cooler than September and 14.8°F warmer than November. October is the 6th warmest month of the year in Sioux Falls and the 7th wettest. Across the month the normal high falls 16°F, from 69°F on October 1 to 53°F on October 31. From one year to the next October's mean temperature typically moves about 3.3°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 46°F and 53°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 27%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| October 1 | 69°F | 45°F | 27% | 15% |
| October 8 | 66°F | 42°F | 26% | 14% |
| October 15 | 62°F | 39°F | 25% | 13% |
| October 22 | 58°F | 35°F | 24% | 12% |
| October 31 | 53°F | 31°F | 22% | 10% |
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 | 69°F | 45°F | 27% | 15% | 11 h 50 min |
| October 2 | 69°F | 45°F | 27% | 15% | 11 h 40 min |
| October 3 | 68°F | 44°F | 27% | 15% | 11 h 40 min |
| October 4 | 68°F | 44°F | 27% | 15% | 11 h 40 min |
| October 5 | 67°F | 43°F | 26% | 15% | 11 h 40 min |
| October 6 | 67°F | 43°F | 26% | 15% | 11 h 30 min |
| October 7 | 66°F | 42°F | 26% | 14% | 11 h 30 min |
| October 8 | 66°F | 42°F | 26% | 14% | 11 h 30 min |
| October 9 | 65°F | 41°F | 26% | 14% | 11 h 20 min |
| October 10 | 64°F | 41°F | 26% | 14% | 11 h 20 min |
| October 11 | 64°F | 40°F | 26% | 14% | 11 h 20 min |
| October 12 | 63°F | 40°F | 26% | 14% | 11 h 10 min |
| October 13 | 63°F | 39°F | 25% | 13% | 11 h 10 min |
| October 14 | 62°F | 39°F | 25% | 13% | 11 h 10 min |
| October 15 | 62°F | 39°F | 25% | 13% | 11 h 10 min |
| October 16 | 61°F | 38°F | 25% | 13% | 11 h |
| October 17 | 61°F | 38°F | 25% | 13% | 11 h |
| October 18 | 60°F | 37°F | 24% | 12% | 11 h |
| October 19 | 59°F | 37°F | 24% | 12% | 10 h 50 min |
| October 20 | 59°F | 36°F | 24% | 12% | 10 h 50 min |
| October 21 | 58°F | 36°F | 24% | 12% | 10 h 50 min |
| October 22 | 58°F | 35°F | 24% | 12% | 10 h 50 min |
| October 23 | 57°F | 35°F | 23% | 12% | 10 h 40 min |
| October 24 | 57°F | 34°F | 23% | 11% | 10 h 40 min |
| October 25 | 56°F | 34°F | 23% | 11% | 10 h 40 min |
| October 26 | 56°F | 34°F | 23% | 11% | 10 h 30 min |
| October 27 | 55°F | 33°F | 23% | 11% | 10 h 30 min |
| October 28 | 55°F | 33°F | 23% | 11% | 10 h 30 min |
| October 29 | 54°F | 32°F | 22% | 10% | 10 h 30 min |
| October 30 | 54°F | 32°F | 22% | 10% | 10 h 20 min |
| October 31 | 53°F | 31°F | 22% | 10% | 10 h 20 min |
- Normal high
- 61°FOctober average
- Normal low
- 38°FOctober average
- Precipitation
- 2.36 inmonth total
- Days with precipitation
- 80.01 inch or more
- Snowfall
- 1.4 inmonth total
- Nights at 32°F or colder
- 10
- Daylight
- 11 h 50 min to 10 h 20 minOctober 1 to October 31
- Days at 70°F or more
- 7
- Days at 80°F or more
- 2
- Sunshine
- 74%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014944; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Sioux Falls in October?
On a given October day the chance of 0.01 inch or more is 25% on average, highest around October 1 (27%). In all, 2.36 in falls on 8 days of a normal October, 1 of them with an inch or more.
In a normal October in Sioux Falls, 10 nights fall to freezing and snowfall averages 1.4 inches.
Snow falls on 1 day in a normal October, and an inch or more covers the ground on 1 day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014944.
How humid and windy is Sioux Falls in October?
At 3 p.m. the normal temperature is 50°F with 49% relative humidity and a dew point of 32°F; at 6 a.m. it is 35°F with 81% humidity. The wind averages 10.1 mph, most often from the west in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 35°F | 29°F | 81% | 8.4 mph | 54% |
| 9 a.m. | 39°F | 31°F | 73% | 10.8 mph | 58% |
| noon | 47°F | 32°F | 55% | 13.2 mph | 46% |
| 3 p.m. | 50°F | 32°F | 49% | 13.3 mph | 55% |
| 6 p.m. | 44°F | 31°F | 60% | 9.2 mph | 48% |
| 9 p.m. | 40°F | 31°F | 69% | 9.2 mph | 59% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014944. 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 Sioux Falls?
The warmest October temperature on Sioux Falls's official record (since 1893) is 95°F, on October 1, 2023; the coldest is −5°F, on October 29, 1925. The wettest October brought 6.89 in (1911); the snowiest, 10.0 inches (1991).
The October mean against the 1991-2020 normal of 49.6°F: 2021 53.9°F (+4.3), 2022 51.9°F (+2.3), 2023 51.9°F (+2.3), 2024 55.8°F (+6.2), 2025 55.3°F (+5.7). 5 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.9°F | +4.3°F | 2.33 in |
| 2022 | 51.9°F | +2.3°F | 0.29 in |
| 2023 | 51.9°F | +2.3°F | 2.54 in |
| 2024 | 55.8°F | +6.2°F | 0.53 in |
| 2025 | 55.3°F | +5.7°F | 0.76 in |
Source: records: ACIS, NWS threaded record FSDthr; recent months: ACIS, station USW00014944. Records and recent months use complete months only.
How does October in Sioux Falls compare across South Dakota?
Across the 100 places PlainClimate covers in South Dakota, October normal highs run from 54°F in Custer to 65°F in Interior; Sioux Falls's is 61°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Sioux Falls in September76°F by day, 52°F at night
- Sioux Falls in November45°F by day, 25°F at night
- Sioux Falls through the yearEvery month, frost dates, records and recent years
- South Dakota in OctoberThe statewide normal and the warmest and coolest places
- Interior: South Dakota's warmest Octobernormal high 65°F