SIOUX CITY, IA 51103 Weather Forecast & Current Conditions

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SIOUX CITY, IA
Current Weather

5:52 AM CDT MAY 19, 2026
Overcast
45°F
Feels Like: 36°F
Dewpoint: 39°F
Rel. Hum.: 79%
Visibility: 10 miles
Wind: NNW at 23 mph, gusts to 31
Pressure: 30.02 inches
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SIOUX CITY, IA 51103
Weather Forecast

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TODAY
Cloudy this morning, then becoming mostly sunny. Highs in the upper 50s. Northwest winds 15 to 20 mph with gusts up to 30 mph.
TONIGHT
Mostly clear. Lows in the mid 30s. North winds 5 to 10 mph with gusts up to 20 mph, becoming northeast after midnight.
WEDNESDAY
Mostly sunny in the morning, then becoming mostly cloudy. Highs in the lower 60s. East winds around 5 mph.
WEDNESDAY NIGHT
Mostly cloudy. Lows in the lower 40s. Southeast winds 5 to 10 mph.
THURSDAY
Mostly cloudy in the morning, then becoming partly sunny. A 50 percent chance of showers. Highs around 60. Southeast winds 5 to 10 mph with gusts up to 20 mph.
THURSDAY NIGHT
Mostly cloudy with a slight chance of thunderstorms. A slight chance of showers in the evening, then a chance of showers after midnight. Lows in the lower 40s. Chance of rain 50 percent.
FRIDAY
Showers likely, mainly in the morning. Highs in the lower 60s. Chance of rain 60 percent.
FRIDAY NIGHT
Mostly cloudy. A chance of showers in the evening. Lows in the mid 40s. Chance of rain 50 percent.
SATURDAY
Mostly cloudy in the morning, then becoming partly sunny. Highs in the lower 70s.
SATURDAY NIGHT
Mostly cloudy in the evening, then becoming partly cloudy. Lows around 50.
SUNDAY
Mostly sunny. Highs in the lower 80s.
SUNDAY NIGHT
Mostly clear. Lows in the mid 50s.
MEMORIAL DAY
Mostly sunny. Highs in the mid 80s.

Visible Weather Satellite
SIOUX CITY, IA 51103
Infrared Weather Satellite
SIOUX CITY, IA 51103
NEXRAD Weather Radar
SIOUX CITY, IA 51103

SIOUX CITY, IA 3 hourly weather forecast

weather forecast created  7:00 PM CDT  5/18/2026
Tuesday
19 MAY 2026
SIOUX CITY, IA 51103 weather forecast Day 1, 0 hours 1 AM 50° 44° Mostly Cloudy 6%

0% Thunder
( 4% severe)
NNW   18 86% 46°
Low 43° SIOUX CITY, IA 51103 weather forecast Day 1, 3 hours 4 AM 46° 38° Mostly Cloudy NW   20 89% 43°
High 60° SIOUX CITY, IA 51103 weather forecast Day 1, 6 hours 7 AM 44° 36° Overcast 0%

0% Thunder
( 1% severe)
NW   18 86% 40°

Decreasing Clouds




Breezy
SIOUX CITY, IA 51103 weather forecast Day 1, 9 hours 10 AM 49° 42° Mostly Cloudy NNW   20 71% 40°
SIOUX CITY, IA 51103 weather forecast Day 1, 12 hours 1 PM 55° 50° Partly Cloudy 0%

0% Thunder
( 0% severe)
NNW   18 59% 41°
SIOUX CITY, IA 51103 weather forecast Day 1, 15 hours 4 PM 59° 56° Partly Cloudy NNW   16 51% 41°
SIOUX CITY, IA 51103 weather forecast Day 1, 18 hours 7 PM 58° 55° Partly Cloudy 0%

0% Thunder
( 1% severe)
NNW   14 45% 37°
SIOUX CITY, IA 51103 weather forecast Day 1, 21 hours 10 PM 50° 47° Partly Cloudy N   7 61% 37°
Wednesday
20 MAY 2026
SIOUX CITY, IA 51103 weather forecast Day 2, 0 hours 1 AM 44° 42° Clear 0%

0% Thunder
( 1% severe)
N   3 76% 37°
Low 35° SIOUX CITY, IA 51103 weather forecast Day 2, 3 hours 4 AM 40° 38° Partly Cloudy   CALM 85% 36°
High 62° SIOUX CITY, IA 51103 weather forecast Day 2, 6 hours 7 AM 39° 37° Mostly Cloudy 0%

0% Thunder
( 1% severe)
E   1 89% 36°

Mostly Cloudy



SIOUX CITY, IA 51103 weather forecast Day 2, 9 hours 10 AM 52° 51° Mostly Cloudy ESE   5 61% 39°
SIOUX CITY, IA 51103 weather forecast Day 2, 12 hours 1 PM 59° 58° Mostly Cloudy 0%

0% Thunder
( 1% severe)
ESE   6 47% 39°
SIOUX CITY, IA 51103 weather forecast Day 2, 15 hours 4 PM 61° 60° Mostly Cloudy ESE   7 44% 39°
SIOUX CITY, IA 51103 weather forecast Day 2, 18 hours 7 PM 61° 60° Mostly Cloudy 1%

0% Thunder
( 3% severe)
SE   9 41% 37°
SIOUX CITY, IA 51103 weather forecast Day 2, 21 hours 10 PM 54° 53° Mostly Cloudy SE   6 57% 39°

SIOUX CITY, IA extended weather forecast

Thursday
21 MAY 2026
Friday
22 MAY 2026
Saturday
23 MAY 2026
Sunday
24 MAY 2026
Monday
25 MAY 2026
Low 45° Low 48° Low 52° Low 52° Low 58°
High 64° High 62° High 77° High 80° High 85°
SIOUX CITY, IA 51103 weather forecast Day 3 SIOUX CITY, IA 51103 weather forecast Day 4 SIOUX CITY, IA 51103 weather forecast Day 5 SIOUX CITY, IA 51103 weather forecast Day 6 SIOUX CITY, IA 51103 weather forecast Day 7
Overcast
26% Rain
Overcast
75% Rain
Overcast
67% Rain
Clear
19% Rain
Partly Cloudy
20% Rain
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