Sioux City weather in April

In April, Sioux City sees average daytime highs of 60°F and overnight lows near 39°F, with 4.0 in of precipitation across 10.6 wet days and about 13.1 hours of daylight. It is the 7th-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 55°F in the first days to 64°F by the end. The sky is clear or mostly clear about 30% of the time in April, and the air most often feels dry.

Daylight stretches from about 12 h 24 min at the start of April to 13 h 48 min by month's end. Set against the rest of the year, April is Sioux City's 12th-clearest and 1st-windiest month. For the whole year in context, see Sioux City's year-round climate.

Daytime high
60°
7th warmest
Overnight low
39°
6th coldest
Precipitation
4.0 in
10.6 wet days
Daylight
13 h 12 min
5:51 AM – 7:00 PM
Cloud cover
62%
12th clearest
Wind
11 mph
1st windiest
Solar energy
5.12 kWh/m²
Travel score
4.6
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 April

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 55°F in the first days to 64°F by the end.

A typical April day in Sioux City reaches about 60°F in the afternoon and slips back to 39°F overnight — a 21°F spread between the day's warmth and the night's chill. On most days the high lands between 44°F and 75°F. Set against its neighbours, April runs about 13°F warmer than March and about 11°F cooler than May.

20°40°60°80°151015202530
Avg high (°F)Avg low (°F)
15534
25534
35534
45635
55635
65635
75736
85736
95736
105837
115837
125837
135938
145938
155938
166039
176039
186040
196140
206140
216241
226241
236241
246342
256342
266343
276443
286443
296444
306544

How April really feels in Sioux City

Once humidity and wind are folded in, April averages 0 days that feel above 90°F and 16 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
16
wind chill below the day's low

The story in April is cold — wind chill drags the overnight "feels like" below the raw low.

Sioux City weather by month

How April compares with the rest of the year at a glance. April is the 7th-warmest and 3rd-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 April

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in April, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 57%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14555
24555
34456
44357
54357
64357
74357
84258
94060
104060
114060
124159
134060
144060
154159
164258
174258
184258
194258
204357
214357
224357
234357
244456
254555
264555
274456
284456
294456
304456

Chance of precipitation in April

Any precipitationSnow

Sioux City gets around 4.0 in of rain and snow over 10.6 wet days in April. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 35% and peaks near 41% on the wettest days, and about 2 days bring snow. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)Snow chance (%)
1278
2288
3298
4298
5309
6319
7329
8329
9339
10349
11359
12358
13368
14378
15378
16377
17376
18376
19385
20385
21384
22384
23383
24393
25392
26392
27392
28402
29402
30411

Humidity in April

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, April lands in the dry band about 97% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)
19910
29910
39910
49910
59910
69910
79910
89820
99820
109820
119820
129820
139820
149820
159820
169820
179730
189730
199730
209730
219730
229730
239730
249730
259631
269631
279631
289541
299442
309352

Wind in April

Winds average 11 mph in April, the windiest month of the year.

Across April, daily wind ranges from about 10 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
411light breeze
511light breeze
611light breeze
711light breeze
811light breeze
911light breeze
1011light breeze
1111light breeze
1211light breeze
1311light breeze
1411light breeze
1511light breeze
1611light breeze
1711light breeze
1811light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze

Sunrise & sunset in April

DaylightNight

Daylight runs from about 12 h 24 min at the start of April to 13 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 84 minutes over April. Sunrise moves from 6:17 AM to 5:29 AM, and sunset from 6:43 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.46:176:43
212.56:166:44
312.56:146:45
412.66:126:47
512.66:106:48
612.76:086:49
712.76:076:50
812.86:056:51
912.86:036:52
1012.96:016:54
1112.96:006:55
1213.05:586:56
1313.05:566:57
1413.15:556:58
1513.15:536:59
1613.25:517:00
1713.25:507:02
1813.25:487:03
1913.35:467:04
2013.35:457:05
2113.45:437:06
2213.45:417:07
2313.55:407:08
2413.55:387:10
2513.65:377:11
2613.65:357:12
2713.75:347:13
2813.75:327:14
2913.75:317:15
3013.85:297:17

Solar energy in April

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in April, about 5.12 kWh/m².

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 — April's 5.12 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.1Bright
165.1Bright
175.1Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.4Bright
295.4Bright
305.4Bright
Planning a trip in April

Hazard calendar for Sioux City

In seasonPeak

In April, 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 April a good time to visit Sioux City?

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

4.6
Sightseeing
7th-best month of the year
0.6
Beach & pool
7th-best month of the year

April is a reasonable time to visit Sioux City for sightseeing.

What to pack for Sioux City in April

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

In April, Sioux City sees daytime highs around 60°F and nights near 39°F. Worth packing: a warm layer, rain gear and sun protection. About 11 days see rain.

a warm layerrain gearsun protection

UV index in Sioux City in April

LowModerateHighVery highExtreme

Clear-sky midday UV in April peaks around 6 — enough to warrant sun protection. 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
April 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).