The temperatures in Sioux City in October are quite cold with temperatures between 7°C and 17°C, warm clothes are a must.
You can expect about 3 to 8 days of rain in Sioux City during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Sioux City in October 2025.
If you’re planning to visit Sioux City in the near future, we highly recommend that you review the 14 day weather forecast for Sioux City before you arrive.
Temperatures
17° / 7°
Rainy Days
5
Snowy Days
0
Dry Days
25
Rainfall
64
mm
Sun Hours
7.7
Hrs