SIOUX CITY, IA 51103 Weather Forecast & Current Conditions

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SIOUX CITY, IA
Current Weather

10:52 AM CDT JUL 21, 2025
Overcast
81°F
Feels Like: 87°F
Dewpoint: 75°F
Rel. Hum.: 82%
Visibility: 10 miles
Wind: SE at 14 mph
Pressure: 29.90 inches
Last 72 hours

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SIOUX CITY, IA 51103
Weather Forecast

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REST OF TODAY
Partly sunny. Highs in the upper 80s. Southeast winds around 10 mph. Heat index values up to 101 this afternoon.
TONIGHT
Partly cloudy. A slight chance of showers and thunderstorms after midnight. Humid with lows in the lower 70s. Southeast winds 5 to 10 mph. Chance of rain 20 percent. Heat index values up to 100 early in the evening.
TUESDAY
Mostly sunny. A slight chance of showers and thunderstorms in the morning. Humid with highs in the lower 90s. South winds 10 to 15 mph with gusts up to 25 mph. Chance of rain 20 percent. Heat index values up to 105 in the afternoon.
TUESDAY NIGHT
Mostly clear. Humid with lows in the mid 70s. South winds 10 to 15 mph with gusts up to 25 mph. Heat index values up to 104 early in the evening.
WEDNESDAY
Sunny with highs in the mid 90s. South winds around 10 mph with gusts up to 20 mph. Heat index values up to 102 in the afternoon.
WEDNESDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. A chance of showers and thunderstorms. Lows in the upper 60s. Chance of rain 50 percent. Heat index values up to 100 early in the evening.
THURSDAY
Partly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 80s. Chance of rain 50 percent.
THURSDAY NIGHT
Partly cloudy in the evening, then becoming mostly cloudy. Lows in the upper 60s.
FRIDAY
Mostly sunny. Highs in the mid 80s.
FRIDAY NIGHT
Partly cloudy. Lows in the upper 60s.
SATURDAY
Sunny. Highs in the upper 80s. Heat index values in the upper 90s in the afternoon.
SATURDAY NIGHT
Mostly clear in the evening, then becoming partly cloudy. Lows in the upper 60s. Heat index values in the upper 90s early in the evening.
SUNDAY
Sunny. Highs in the lower 90s. Heat index values up to 105 in the afternoon.

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  7/20/2025
Monday
21 JUL 2025
SIOUX CITY, IA 51103 weather forecast Day 1, 0 hours 1 AM 74° 74° Mostly Cloudy 13%
RAIN
<.01 in
0% Thunder
( 28% severe)
ESE   10 93% 72°
Low 71° SIOUX CITY, IA 51103 weather forecast Day 1, 3 hours 4 AM 72° 72° Mostly Cloudy ESE   9 97% 71°
High 87° SIOUX CITY, IA 51103 weather forecast Day 1, 6 hours 7 AM 72° 72° Mostly Cloudy 6%

0% Thunder
( 20% severe)
ESE   9 97% 71°

Mostly Cloudy



SIOUX CITY, IA 51103 weather forecast Day 1, 9 hours 10 AM 77° 78° Mostly Cloudy ESE   10 87% 73°
SIOUX CITY, IA 51103 weather forecast Day 1, 12 hours 1 PM 83° 91° Mostly Cloudy 4%

0% Thunder
( 16% severe)
SE   12 80% 76°
SIOUX CITY, IA 51103 weather forecast Day 1, 15 hours 4 PM 86° 97° Partly Cloudy SE   12 75% 77°
SIOUX CITY, IA 51103 weather forecast Day 1, 18 hours 7 PM 86° 97° Partly Cloudy 6%

0% Thunder
( 19% severe)
SE   12 75% 77°
SIOUX CITY, IA 51103 weather forecast Day 1, 21 hours 10 PM 79° 83° Partly Cloudy ESE   10 88% 75°
Tuesday
22 JUL 2025
SIOUX CITY, IA 51103 weather forecast Day 2, 0 hours 1 AM 76° 76° Mostly Cloudy 23%
RAIN
.5–1 in
0% Thunder
( 16% severe)
SE   9 94% 74°
Low 73° SIOUX CITY, IA 51103 weather forecast Day 2, 3 hours 4 AM 75° 75° Partly Cloudy S   9 94% 73°
High 93° SIOUX CITY, IA 51103 weather forecast Day 2, 6 hours 7 AM 75° 75° Mostly Cloudy 5%

0% Thunder
( 11% severe)
SE   10 94% 73°

Partly Cloudy



SIOUX CITY, IA 51103 weather forecast Day 2, 9 hours 10 AM 82° 89° Partly Cloudy SSE   13 79% 75°
SIOUX CITY, IA 51103 weather forecast Day 2, 12 hours 1 PM 89° 101° Partly Cloudy 3%

0% Thunder
( 13% severe)
S   15 66% 76°
SIOUX CITY, IA 51103 weather forecast Day 2, 15 hours 4 PM 92° 105° Partly Cloudy S   16 60% 76°
SIOUX CITY, IA 51103 weather forecast Day 2, 18 hours 7 PM 90° 101° Partly Cloudy 2%

0% Thunder
( 16% severe)
S   14 62% 75°
SIOUX CITY, IA 51103 weather forecast Day 2, 21 hours 10 PM 83° 89° Partly Cloudy SSE   13 72% 73°

SIOUX CITY, IA extended weather forecast

BAD DAY
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Low 75° Low 75° Low 70° Low 68° Low 67°
High 95° High 95° High 89° High 90° High 84°
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
Partly Cloudy
12% Rain
Partly Cloudy
22% Rain
Partly Cloudy
42% Rain
Partly Cloudy
35% Rain
Mostly Cloudy
45% Rain
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