Sioux City weather in October: Sioux City, Iowa: normal highs, lows, rain and records for October
Sioux City in October has a normal high of 63°F and a normal low of 38°F, a daily mean of 50°F, falling from 71°F on the 1st to 55°F by the 31st. Measurable precipitation falls on 8 days in a normal October, 2.20 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 17°C and low of 3°C, 56 mm of precipitation and 2 cm of snow in October.
- NOAA stationSioux City Airport
- Station IDUSW00014943
- Location42.39°N 96.38°W
- Elevation1,095 ft (334 m)
- From the center7 miles
- Population86,875
- Jan 30° 10°
- Feb 34° 15°
- Mar 48° 26°
- Apr 61° 37°
- May 72° 49°
- Jun 82° 59°
- Jul 85° 63°
- Aug 83° 61°
- Sep 77° 51°
- Oct 63° 38°
- Nov 47° 25°
- Dec 33° 15°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Sioux City in October?
The normal high is 63°F and the normal low 38°F, for a daily mean of 50.3°F. October is 13.6°F cooler than September and 14.4°F warmer than November. October is the 6th warmest month of the year in Sioux City and the 7th wettest. Across the month the normal high falls 16°F, from 71°F on October 1 to 55°F on October 31. From one year to the next October's mean temperature typically moves about 3.1°F either way (NOAA's standard deviation), so roughly two Octobers in three average between 47°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 | 71°F | 45°F | 27% | 16% |
| October 8 | 67°F | 41°F | 26% | 15% |
| October 15 | 63°F | 38°F | 24% | 13% |
| October 22 | 60°F | 35°F | 22% | 12% |
| October 31 | 55°F | 31°F | 20% | 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 | 71°F | 45°F | 27% | 16% | 11 h 50 min |
| October 2 | 70°F | 44°F | 27% | 16% | 11 h 50 min |
| October 3 | 70°F | 44°F | 26% | 16% | 11 h 40 min |
| October 4 | 69°F | 43°F | 26% | 16% | 11 h 40 min |
| October 5 | 69°F | 43°F | 26% | 15% | 11 h 40 min |
| October 6 | 68°F | 42°F | 26% | 15% | 11 h 30 min |
| October 7 | 68°F | 42°F | 26% | 15% | 11 h 30 min |
| October 8 | 67°F | 41°F | 26% | 15% | 11 h 30 min |
| October 9 | 67°F | 41°F | 25% | 15% | 11 h 30 min |
| October 10 | 66°F | 41°F | 25% | 14% | 11 h 20 min |
| October 11 | 66°F | 40°F | 25% | 14% | 11 h 20 min |
| October 12 | 65°F | 40°F | 25% | 14% | 11 h 20 min |
| October 13 | 65°F | 39°F | 24% | 14% | 11 h 10 min |
| October 14 | 64°F | 39°F | 24% | 13% | 11 h 10 min |
| October 15 | 63°F | 38°F | 24% | 13% | 11 h 10 min |
| October 16 | 63°F | 38°F | 24% | 13% | 11 h 10 min |
| October 17 | 62°F | 37°F | 23% | 13% | 11 h |
| October 18 | 62°F | 37°F | 23% | 12% | 11 h |
| October 19 | 61°F | 37°F | 23% | 12% | 11 h |
| October 20 | 61°F | 36°F | 23% | 12% | 10 h 50 min |
| October 21 | 60°F | 36°F | 22% | 12% | 10 h 50 min |
| October 22 | 60°F | 35°F | 22% | 12% | 10 h 50 min |
| October 23 | 59°F | 35°F | 22% | 11% | 10 h 50 min |
| October 24 | 58°F | 34°F | 22% | 11% | 10 h 40 min |
| October 25 | 58°F | 34°F | 22% | 11% | 10 h 40 min |
| October 26 | 57°F | 34°F | 21% | 11% | 10 h 40 min |
| October 27 | 57°F | 33°F | 21% | 11% | 10 h 40 min |
| October 28 | 56°F | 33°F | 21% | 10% | 10 h 30 min |
| October 29 | 56°F | 32°F | 21% | 10% | 10 h 30 min |
| October 30 | 55°F | 32°F | 21% | 10% | 10 h 30 min |
| October 31 | 55°F | 31°F | 20% | 10% | 10 h 30 min |
- Normal high
- 63°FOctober average
- Normal low
- 38°FOctober average
- Precipitation
- 2.20 inmonth total
- Days with precipitation
- 80.01 inch or more
- Snowfall
- 0.8 inmonth total
- Days at 90°F or more
- 1
- Nights at 32°F or colder
- 9
- Daylight
- 11 h 50 min to 10 h 30 minOctober 1 to October 31
- Days at 70°F or more
- 10
- Days at 80°F or more
- 3
- Sunshine
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00014943; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Sioux City in October?
On a given October day the chance of 0.01 inch or more is 24% on average, highest around October 1 (27%). In all, 2.20 in falls on 8 days of a normal October, 1 of them with an inch or more.
In a normal October in Sioux City, 1 days reach 90°F, 9 nights fall to freezing and snowfall averages 0.8 inches.
Snow falls on 1 day in a normal October.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014943.
How humid and windy is Sioux City in October?
At 3 p.m. the normal temperature is 53°F with 46% relative humidity and a dew point of 33°F; at 6 a.m. it is 36°F with 81% humidity. The wind averages 10.5 mph, most often from the west-northwest in the afternoon. A dew point under 50°F feels dry.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 36°F | 31°F | 81% | 9.3 mph | 60% |
| 9 a.m. | 41°F | 33°F | 74% | 11.1 mph | 66% |
| noon | 50°F | 34°F | 53% | 13.5 mph | 60% |
| 3 p.m. | 53°F | 33°F | 46% | 13.5 mph | 62% |
| 6 p.m. | 47°F | 33°F | 57% | 9.6 mph | 60% |
| 9 p.m. | 42°F | 32°F | 69% | 9.2 mph | 69% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00014943. 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 City?
The warmest October temperature on Sioux City's official record (since 1889) is 96°F, on October 3, 1938; the coldest is 5°F, on October 29, 1925. The wettest October brought 6.83 in (2017); the snowiest, 9.8 inches (1991).
The October mean against the 1991-2020 normal of 50.3°F: 2021 53.9°F (+3.6), 2022 51.1°F (+0.8), 2023 51.6°F (+1.3), 2024 56.9°F (+6.6), 2025 56.1°F (+5.9). 5 of 5 ran warmer than normal.
| October | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 53.9°F | +3.6°F | 2.82 in |
| 2022 | 51.1°F | +0.8°F | 0.48 in |
| 2023 | 51.6°F | +1.3°F | 4.46 in |
| 2024 | 56.9°F | +6.6°F | 0.62 in |
| 2025 | 56.1°F | +5.9°F | 1.22 in |
Source: records: ACIS, NWS threaded record SUXthr; recent months: ACIS, station USW00014943. Records and recent months use complete months only.
How does October in Sioux City compare across Iowa?
Across the 132 places PlainClimate covers in Iowa, October normal highs run from 57°F in Northwood to 67°F in Glenwood; Sioux City's is 63°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.