See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
13°
Mostly Clear
Feels Like: 14°
Min: 13°
Max: 20°
The next few hours will be overcast, with today reaching 18°C and dropping to 17°C. The coming days will be mostly cloudy throughout the day.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:13
Sunrise
19:26
Sunset
Moon
Waxing Crescent
13:16
Moonrise
21:26
Moonset
Daily Forecast
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Thursday
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Weather in Sioux City today, September 16, 2026
Sioux City could see fog on September 16, 2026, so early travel may need extra care. Visibility is the main watchpoint while the air stays still. Cloud leads the morning, peaking close to 100% near 06:00. Sunshine has little room until later in the day.
Temperatures climb from an overnight low near 13°C toward a daytime high of about 20°C. Moisture in the air spans 67%-100%, with the highest values around 21:00. Airflow remains manageable, reaching about 3.9 km/h around 12:00.
Expect persistent cloud later on, with amounts around 100% by 12:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 13.2 km on average, though it can drop toward 4.8 km in thicker cloud or showers. Sunrise is at 07:13 and sunset at 19:26, giving 12 hours 13 minutes of sunlight today.
The practical takeaway for Sioux City on September 16, 2026 is reduced clarity at times, so plan journeys with care near 20°C.
Frequently asked questions about weather in Sioux City
How warm does it get in Sioux City?
The warmest month in Sioux City is July, with average high temperatures of 30°C. The average temperature during this period is around 25°C.
How cold does it get in Sioux City?
The coldest month in Sioux City is January, with average low temperatures of -9°C. The average temperature during this period is around -6°C.
What is the wettest time of year in Sioux City?
The wettest month in Sioux City is May, with an average of 128mm of precipitation.
What is the driest time of year in Sioux City?
The driest month in Sioux City is February, with an average of 27mm of precipitation.
