Sioux City weather in July

In July, Sioux City sees average daytime highs of 84°F and overnight lows near 65°F, with 3.0 in of rain across 8.8 wet days and about 14.8 hours of daylight. It is the 1st-warmest and 6th-wettest month of the year here.

Day-to-day highs hold fairly steady near 84°F through the month. The sky is clear or mostly clear about 48% of the time in July, and the air most often feels muggy.

Daylight stretches from about 15 h 06 min at the start of July to 14 h 24 min by month's end. Set against the rest of the year, July is Sioux City's 2nd-clearest and 11th-windiest month. For the whole year in context, see Sioux City's year-round climate.

Daytime high
84°
1st warmest
Overnight low
65°
12th coldest
Rainfall
3.0 in
8.8 wet days
Daylight
14 h 48 min
5:06 AM – 7:56 PM
Cloud cover
45%
2nd clearest
Wind
8 mph
11th windiest
Solar energy
6.66 kWh/m²
Travel score
5.8
out of 10

Sioux City is city in Woodbury and Plymouth counties in Iowa, United States.

Density
547/km²
people per km²
Founded
1854

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 84°F through the month.

A typical July day in Sioux City reaches about 84°F in the afternoon and slips back to 65°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 93°F. Set against its neighbours, July runs about 4°F warmer than June and about 2°F warmer than August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18365
28365
38365
48365
58465
68465
78465
88465
98466
108466
118566
128566
138566
148566
158566
168566
178566
188566
198566
208566
218566
228566
238566
248566
258466
268465
278465
288465
298465
308465
318365

How July really feels in Sioux City

Once humidity and wind are folded in, July averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Sioux City weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan29° / 13°0.94.74.39.20.0
Feb34° / 16°1.154.410.30.0
Mar47° / 27°2.273.211.61.6
Apr60° / 39°4.010.61.813.14.6
May71° / 51°4.912.60.114.46.2
Jun80° / 61°4.911.8015.16.3
Jul84° / 65°3.08.8014.85.8
Aug82° / 63°3.99.4013.76.6
Sep75° / 54°3.07.7012.37.4
Oct62° / 41°2.47.40.510.85.6
Nov46° / 28°1.65.42.59.61.5
Dec33° / 17°1.25.24.28.90.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 18% of July, with mostly cloudy or overcast conditions the remaining 34%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16238
26238
36238
46238
56238
66238
76238
86238
96337
106337
116436
126535
136634
146634
156634
166733
176832
186832
196832
206931
216931
227030
237030
247030
257030
266931
276931
286931
296832
306733
316733

Chance of precipitation in July

Any precipitation

Sioux City gets around 3.0 in of rain over 8.8 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
134
233
333
433
532
632
731
831
931
1030
1130
1229
1329
1429
1529
1629
1728
1828
1928
2028
2127
2227
2327
2427
2527
2627
2727
2827
2928
3028
3129

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the muggy band about 30% of days. Sticky, muggy-or-worse air turns up on roughly 50% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
112182632130
211172632140
310172632141
410162732151
59162732151
69152832161
78142833161
88142833171
97132833171
107122834181
116122834191
126122833191
136122833201
146122733212
155122732212
165122732222
175132731222
185132730222
195142730222
206142729222
216152728222
226162728222
236172727212
246182726212
256182826202
266192826192
276202825192
286202825182
296212826172
306212826172
316212826162

Wind in July

Winds average 8 mph in July.

Across July, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in July

DaylightNight

Daylight runs from about 15 h 06 min at the start of July to 14 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:56 AM to 5:20 AM, and sunset from 8:01 PM to 7:43 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.14:568:01
215.14:578:01
315.14:578:01
415.04:588:01
515.04:598:01
615.04:598:01
715.05:008:00
815.05:008:00
915.05:018:00
1015.05:027:59
1114.95:027:59
1214.95:037:58
1314.95:047:58
1414.95:057:57
1514.95:067:57
1614.85:067:56
1714.85:077:55
1814.85:087:55
1914.85:097:54
2014.75:107:53
2114.75:117:53
2214.75:127:52
2314.65:137:51
2414.65:137:50
2514.65:147:49
2614.55:157:48
2714.55:167:47
2814.55:177:46
2914.45:187:45
3014.45:197:44
3114.45:207:43

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.66 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.82 kWh/m² to a high of 6.66 kWh/m² in July across the year — July's 6.66 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.7Intense
26.7Intense
36.7Intense
46.7Intense
56.7Intense
66.7Intense
76.7Intense
86.7Intense
96.7Intense
106.7Intense
116.7Intense
126.7Intense
136.7Intense
146.7Intense
156.7Intense
166.7Intense
176.7Intense
186.7Intense
196.7Intense
206.7Intense
216.6Intense
226.6Intense
236.6Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.4Intense
296.4Intense
306.3Intense
316.3Intense
Planning a trip in July

Hazard calendar for Sioux City

In seasonPeak

In July, Sioux City sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

Sioux City's rainy season runs April–October, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Sioux City?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.8
Sightseeing
5th-best month of the year
7.3
Beach & pool
1st-best month of the year

July is a reasonable time to visit Sioux City for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Sioux City in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Sioux City sees daytime highs around 84°F and nights near 65°F. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Sioux City in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Sioux City peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 19UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May6High
Jun9Very high
Jul8Very high
Aug7High
Sep6High
Oct4Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Sioux City?

Sioux City sits at 42.5°N, 96.4°W, 1,201 ft above sea level, in United States. The nearest listed city is Norfolk, 62 mi away.

Topography around Sioux City

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Sioux City.

Within 2 miles, the terrain around Sioux City has only modest variations in elevation — a maximum elevation change of 282 ft around an average of 1,152 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 436 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 892 ft.

The land around Sioux City is covered by artificial surfaces (46%) and trees (30%) within 2 miles, cropland (52%) and grassland (23%) within 10 miles, and cropland (84%) within 50 miles.

2 miles
282 ft
10 miles
436 ft
50 miles
892 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Norfolk 62 mi · Fremont 74 mi · Sioux Falls 74 mi · Columbus 89 mi · Omaha 89 mi · Council Bluffs 90 mi · La Vista 93 mi · Papillion 95 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Sioux City (42.5°, -96.4003°, elevation 1,201 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).