Weather forecast for tomorrowSioux City, IA

Weather forecast for tomorrow

Sunday Oct 18, 2026

  • 70°F
  • 41°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 17mphS 179°
  • Humidity: 50%
  • UV index: 4
  • Sunrise: 7:42 am CDT
  • Sunset: 6:38 pm CDT
  • ▼
Tomorrow, in Sioux City, sunny and dry conditions are also anticipated.
Temperature readings are forecasted to span from a high of an agreeable 69.8°F to a low of an icy 41°F.
This October day will feature warmer weather, consistent with September's average of 75.6°F.
Sunrise will be at 7:42 am and sunset at 6:38 pm; tomorrow's daylight will last for 10h and 56min.

Hourly overview

Hourly temperatures

Warmest hour: 3 pm 68°C.
Coldest hour: 6 am 43°C.

Chance of precipitation

Highest chance: 6 am 3%.

Hourly weather forecast

  • 12 am
  • 48°F
  • Feels like:
    43°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 12mphS 179°
  • Humidity: 59%
  • Pressure: 30.21"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 2 am
  • 46°F
  • Feels like:
    41°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 13mphS 178°
  • Humidity: 64%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 4 am
  • 45°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 13mphS 172°
  • Humidity: 69%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 6 am
  • 43°F
  • Feels like:
    37°F
Clear
Clear
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 12mphS 174°
  • Humidity: 72%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunrise: 7:42 am
  • 8 am
  • 43°F
  • Feels like:
    36°F
Sunny
Sunny
  • Precip. probability: 3%
  • Precipitation: 0"
  • Wind: 12mphS 172°
  • Humidity: 75%
  • Pressure: 30.18"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 am
  • 52°F
  • Feels like:
    46°F
Sunny
Sunny
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 14mphS 178°
  • Humidity: 59%
  • Pressure: 30.15"Hg
  • Visibility: 10mi
  • UV index: 1
  • ▼
  • 12 pm
  • 61°F
  • Feels like:
    59°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 16mphS 185°
  • Humidity: 44%
  • Pressure: 30.12"Hg
  • Visibility: 10mi
  • UV index: 3
  • ▼
  • 2 pm
  • 66°F
  • Feels like:
    66°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 16mphS 187°
  • Humidity: 38%
  • Pressure: 30.09"Hg
  • Visibility: 10mi
  • UV index: 4
  • ▼
  • 4 pm
  • 68°F
  • Feels like:
    68°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 16mphS 184°
  • Humidity: 36%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 2
  • ▼
  • 6 pm
  • 66°F
  • Feels like:
    66°F
Sunny
Sunny
  • Precip. probability: 0%
  • Precipitation: 0"
  • Wind: 14mphS 174°
  • Humidity: 37%
  • Pressure: 30.06"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Sunset: 6:38 pm
  • 8 pm
  • 57°F
  • Feels like:
    55°F
Clear
Clear
  • Precip. probability: 1%
  • Precipitation: 0"
  • Wind: 9mphSSE 168°
  • Humidity: 50%
  • Pressure: 30.12"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
  • 10 pm
  • 52°F
  • Feels like:
    50°F
Clear
Clear
  • Precip. probability: 2%
  • Precipitation: 0"
  • Wind: 8mphS 171°
  • Humidity: 59%
  • Pressure: 30.15"Hg
  • Visibility: 10mi
  • UV index: 0
  • ▼
Tomorrow, on Sunday, sunny conditions are likely to prevail.
The temperature will be between a minimum of 42.8°F and a maximum of 68°F. The feels-like temperature will vary between the lowest temperature of 35.6°F and the highest temperature of 68°F. The warmest part of the day will be at 3 pm and 4 pm.
Tomorrow, the expected high matches September's average of 75.6°F more than October's. Tomorrow, the minimum temperature will be resembling the average low for October.
Updated: Oct 17, 2026 @ 13:56:23 UTC
Published by: Weather U.S. | About Us
Data Sources | weather.com | Weather
Weather Forecasting & Climate

Frequently asked questions

On Sunday, conditions remain stable and sunny, with little cloud presence.

Tomorrow, the maximum temperature will be 69.8°F, while the minimum temperature will be 41°F.
Tomorrow, the maximum temperature will be noticeably higher than the average highest temperature of 59.9°F in October. Tomorrow, the lowest temperature will be in line with the average low temperature.

On Sunday, in Sioux City, sunrise will be at 7:42 am and sunset at 6:38 pm (CDT).

Tomorrow, the daylight will last for 10h and 56min.