Sioux City weather in January

In January, Sioux City sees average daytime highs of 29°F and overnight lows near 13°F, with 0.9 in of precipitation across 4.7 wet days and about 9.2 hours of daylight. It is the 12th-warmest and 12th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°F through the month. The sky is clear or mostly clear about 30% of the time in January, and the air most often feels dry.

Daylight stretches from about 8 h 54 min at the start of January to 9 h 42 min by month's end. Set against the rest of the year, January is Sioux City's 11th-clearest and 7th-windiest month. For the whole year in context, see Sioux City's year-round climate.

Daytime high: 29°; 12th warmest
Overnight low: 13°; 1st coldest
Precipitation: 0.9 in; 4.7 wet days
Daylight: 9 h 12 min; 7:59 AM – 5:11 PM
Cloud cover: 61%; 11th clearest
Wind: 10 mph; 7th windiest
Solar energy: 2.19 kWh/m²
Travel score: 0.0; 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.

← December Sioux City year-round climate February →Best places to visit in January

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

Temperature in January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 29°F through the month.

A typical January day in Sioux City reaches about 29°F in the afternoon and slips back to 13°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 11°F and 46°F. Set against its neighbours, January runs about 4°F cooler than December and about 5°F cooler than February.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Avg high (°F)	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	29	30	30	30	30	30	30	30	31	31	31
Avg low (°F)	13	13	13	13	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	12	13	13	13	13	13	13	13	13	13	13

	Avg high (°F)	Avg low (°F)
1	29	13
2	29	13
3	29	13
4	29	13
5	29	12
6	29	12
7	29	12
8	29	12
9	29	12
10	29	12
11	29	12
12	29	12
13	29	12
14	29	12
15	29	12
16	29	12
17	29	12
18	29	12
19	29	12
20	29	12
21	29	12
22	30	13
23	30	13
24	30	13
25	30	13
26	30	13
27	30	13
28	30	13
29	31	13
30	31	13
31	31	13

How January really feels in Sioux City

Once humidity and wind are folded in, January averages 0 days that feel above 90°F and 31 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

31 feel bitter (≤ 14°F)

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

Sioux City weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 12th-wettest month here — the current month is highlighted below.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Snow days	Daylight (hours)	Travel score
Jan	29° / 13°	0.9	4.7	4.3	9.2	0.0
Feb	34° / 16°	1.1	5	4.4	10.3	0.0
Mar	47° / 27°	2.2	7	3.2	11.6	1.6
Apr	60° / 39°	4.0	10.6	1.8	13.1	4.6
May	71° / 51°	4.9	12.6	0.1	14.4	6.2
Jun	80° / 61°	4.9	11.8	0	15.1	6.3
Jul	84° / 65°	3.0	8.8	0	14.8	5.8
Aug	82° / 63°	3.9	9.4	0	13.7	6.6
Sep	75° / 54°	3.0	7.7	0	12.3	7.4
Oct	62° / 41°	2.4	7.4	0.5	10.8	5.6
Nov	46° / 28°	1.6	5.4	2.5	9.6	1.5
Dec	33° / 17°	1.2	5.2	4.2	8.9	0.0

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 30% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 14% of January, with mostly cloudy or overcast conditions the remaining 56%.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Clearer (%)	43	44	43	44	45	45	46	46	46	46	46	46	45	45	44	43	43	43	43	42	42	42	42	42	42	42	43	43	42	42	43
Cloudier (%)	57	56	57	56	55	55	54	54	54	54	54	54	55	55	56	57	57	57	57	58	58	58	58	58	58	58	57	57	58	58	57

	Clearer (%)	Cloudier (%)
1	43	57
2	44	56
3	43	57
4	44	56
5	45	55
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	43	57
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	43	57
28	43	57
29	42	58
30	42	58
31	43	57

Chance of precipitation in January

Any precipitationSnow

Sioux City gets around 0.9 in of rain and snow over 4.7 wet days in January, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 16% and peaks near 17% on the wettest days, and about 4 days bring snow.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Rain chance (%)	17	17	16	16	16	16	15	15	15	15	15	15	15	15	15	15	16	16	16	16	16	16	16	16	16	16	16	15	15	15	15
Snow chance (%)	15	15	14	14	14	14	14	14	13	13	13	13	13	13	13	14	14	14	14	14	14	14	14	14	14	15	15	15	15	15	15

	Rain chance (%)	Snow chance (%)
1	17	15
2	17	15
3	16	14
4	16	14
5	16	14
6	16	14
7	15	14
8	15	14
9	15	13
10	15	13
11	15	13
12	15	13
13	15	13
14	15	13
15	15	13
16	15	14
17	16	14
18	16	14
19	16	14
20	16	14
21	16	14
22	16	14
23	16	14
24	16	14
25	16	14
26	16	15
27	16	15
28	15	15
29	15	15
30	15	15
31	15	15

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Dry (%)	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100	100

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

Wind in January

Winds average 10 mph in January.

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

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Wind speed (mph)	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10	10
Feels	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze	light breeze

	Wind speed (mph)	Feels
1	10	light breeze
2	10	light breeze
3	10	light breeze
4	10	light breeze
5	10	light breeze
6	10	light breeze
7	10	light breeze
8	10	light breeze
9	10	light breeze
10	10	light breeze
11	10	light breeze
12	10	light breeze
13	10	light breeze
14	10	light breeze
15	10	light breeze
16	10	light breeze
17	10	light breeze
18	10	light breeze
19	10	light breeze
20	10	light breeze
21	10	light breeze
22	10	light breeze
23	10	light breeze
24	10	light breeze
25	10	light breeze
26	10	light breeze
27	10	light breeze
28	10	light breeze
29	10	light breeze
30	10	light breeze
31	10	light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 8 h 54 min at the start of January to 9 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over January. Sunrise moves from 8:01 AM to 7:49 AM, and sunset from 4:57 PM to 5:29 PM.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Daylight (h)	8.9	8.9	9.0	9.0	9.0	9.0	9.0	9.0	9.1	9.1	9.1	9.1	9.1	9.2	9.2	9.2	9.2	9.3	9.3	9.3	9.3	9.4	9.4	9.4	9.5	9.5	9.5	9.6	9.6	9.6	9.7
Sunrise (AM)	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:01	8:00	8:00	8:00	8:00	7:59	7:59	7:59	7:58	7:58	7:57	7:57	7:56	7:56	7:55	7:54	7:54	7:53	7:52	7:51	7:50	7:50	7:49
Sunset (PM)	4:57	4:58	4:58	4:59	5:00	5:01	5:02	5:03	5:04	5:05	5:06	5:07	5:08	5:09	5:10	5:11	5:12	5:13	5:15	5:16	5:17	5:18	5:19	5:20	5:22	5:23	5:24	5:25	5:27	5:28	5:29

	Daylight (h)	Sunrise (AM)	Sunset (PM)
1	8.9	8:01	4:57
2	8.9	8:01	4:58
3	9.0	8:01	4:58
4	9.0	8:01	4:59
5	9.0	8:01	5:00
6	9.0	8:01	5:01
7	9.0	8:01	5:02
8	9.0	8:01	5:03
9	9.1	8:01	5:04
10	9.1	8:00	5:05
11	9.1	8:00	5:06
12	9.1	8:00	5:07
13	9.1	8:00	5:08
14	9.2	7:59	5:09
15	9.2	7:59	5:10
16	9.2	7:59	5:11
17	9.2	7:58	5:12
18	9.3	7:58	5:13
19	9.3	7:57	5:15
20	9.3	7:57	5:16
21	9.3	7:56	5:17
22	9.4	7:56	5:18
23	9.4	7:55	5:19
24	9.4	7:54	5:20
25	9.5	7:54	5:22
26	9.5	7:53	5:23
27	9.5	7:52	5:24
28	9.6	7:51	5:25
29	9.6	7:50	5:27
30	9.6	7:50	5:28
31	9.7	7:49	5:29

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 2.19 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 — January's 2.19 kWh/m² sits near the bottom.

	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Solar energy (kWh/m²)	1.9	1.9	1.9	1.9	2.0	2.0	2.0	2.0	2.0	2.1	2.1	2.1	2.1	2.1	2.2	2.2	2.2	2.2	2.3	2.3	2.3	2.3	2.4	2.4	2.4	2.5	2.5	2.5	2.6	2.6	2.6
Level	Dim	Dim	Dim	Dim	Dim	Dim	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate	Moderate

	Solar energy (kWh/m²)	Level
1	1.9	Dim
2	1.9	Dim
3	1.9	Dim
4	1.9	Dim
5	2.0	Dim
6	2.0	Dim
7	2.0	Moderate
8	2.0	Moderate
9	2.0	Moderate
10	2.1	Moderate
11	2.1	Moderate
12	2.1	Moderate
13	2.1	Moderate
14	2.1	Moderate
15	2.2	Moderate
16	2.2	Moderate
17	2.2	Moderate
18	2.2	Moderate
19	2.3	Moderate
20	2.3	Moderate
21	2.3	Moderate
22	2.3	Moderate
23	2.4	Moderate
24	2.4	Moderate
25	2.4	Moderate
26	2.5	Moderate
27	2.5	Moderate
28	2.5	Moderate
29	2.6	Moderate
30	2.6	Moderate
31	2.6	Moderate

Planning a trip in January

Hazard calendar for Sioux City

In seasonPeak

None of Sioux City's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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 January a good time to visit Sioux City?

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

0.0

Sightseeing

10th-best month of the year

0.0

Beach & pool

10th-best month of the year

January is a weaker month for outdoor sightseeing in Sioux City.

What to pack for Sioux City in January

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

In January, Sioux City sees daytime highs around 29°F and nights near 13°F. Pack a warm layer and a heavy coat. About 5 days see rain.

a warm layera heavy coat

UV index in Sioux City in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 2. 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.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	4	6	6	9	8	7	6	4	2	2
Level	Low	Moderate	Moderate	High	High	Very high	Very high	High	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Low
Feb	3	Moderate
Mar	4	Moderate
Apr	6	High
May	6	High
Jun	9	Very high
Jul	8	Very high
Aug	7	High
Sep	6	High
Oct	4	Moderate
Nov	2	Moderate
Dec	2	Low

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

artificial surfaces 46%

10 miles

436 ft

cropland 52%

50 miles

892 ft

cropland 84%

treesgrasslandcroplandartificial surfacesbare terrainwater

← December Sioux City year-round climate February →Best places to visit in January

January 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

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).

	Avg high (°F)	Avg low (°F)
1	29	13
2	29	13
3	29	13
4	29	13
5	29	12
6	29	12
7	29	12
8	29	12
9	29	12
10	29	12
11	29	12
12	29	12
13	29	12
14	29	12
15	29	12
16	29	12
17	29	12
18	29	12
19	29	12
20	29	12
21	29	12
22	30	13
23	30	13
24	30	13
25	30	13
26	30	13
27	30	13
28	30	13
29	31	13
30	31	13
31	31	13

	Clearer (%)	Cloudier (%)
1	43	57
2	44	56
3	43	57
4	44	56
5	45	55
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	43	57
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	43	57
28	43	57
29	42	58
30	42	58
31	43	57

	Rain chance (%)	Snow chance (%)
1	17	15
2	17	15
3	16	14
4	16	14
5	16	14
6	16	14
7	15	14
8	15	14
9	15	13
10	15	13
11	15	13
12	15	13
13	15	13
14	15	13
15	15	13
16	15	14
17	16	14
18	16	14
19	16	14
20	16	14
21	16	14
22	16	14
23	16	14
24	16	14
25	16	14
26	16	15
27	16	15
28	15	15
29	15	15
30	15	15
31	15	15

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	29	13
2	29	13
3	29	13
4	29	13
5	29	12
6	29	12
7	29	12
8	29	12
9	29	12
10	29	12
11	29	12
12	29	12
13	29	12
14	29	12
15	29	12
16	29	12
17	29	12
18	29	12
19	29	12
20	29	12
21	29	12
22	30	13
23	30	13
24	30	13
25	30	13
26	30	13
27	30	13
28	30	13
29	31	13
30	31	13
31	31	13

	Clearer (%)	Cloudier (%)
1	43	57
2	44	56
3	43	57
4	44	56
5	45	55
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	43	57
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	43	57
28	43	57
29	42	58
30	42	58
31	43	57

	Rain chance (%)	Snow chance (%)
1	17	15
2	17	15
3	16	14
4	16	14
5	16	14
6	16	14
7	15	14
8	15	14
9	15	13
10	15	13
11	15	13
12	15	13
13	15	13
14	15	13
15	15	13
16	15	14
17	16	14
18	16	14
19	16	14
20	16	14
21	16	14
22	16	14
23	16	14
24	16	14
25	16	14
26	16	15
27	16	15
28	15	15
29	15	15
30	15	15
31	15	15

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100

	Avg high (°F)	Avg low (°F)
1	29	13
2	29	13
3	29	13
4	29	13
5	29	12
6	29	12
7	29	12
8	29	12
9	29	12
10	29	12
11	29	12
12	29	12
13	29	12
14	29	12
15	29	12
16	29	12
17	29	12
18	29	12
19	29	12
20	29	12
21	29	12
22	30	13
23	30	13
24	30	13
25	30	13
26	30	13
27	30	13
28	30	13
29	31	13
30	31	13
31	31	13

	Clearer (%)	Cloudier (%)
1	43	57
2	44	56
3	43	57
4	44	56
5	45	55
6	45	55
7	46	54
8	46	54
9	46	54
10	46	54
11	46	54
12	46	54
13	45	55
14	45	55
15	44	56
16	43	57
17	43	57
18	43	57
19	43	57
20	42	58
21	42	58
22	42	58
23	42	58
24	42	58
25	42	58
26	42	58
27	43	57
28	43	57
29	42	58
30	42	58
31	43	57

	Rain chance (%)	Snow chance (%)
1	17	15
2	17	15
3	16	14
4	16	14
5	16	14
6	16	14
7	15	14
8	15	14
9	15	13
10	15	13
11	15	13
12	15	13
13	15	13
14	15	13
15	15	13
16	15	14
17	16	14
18	16	14
19	16	14
20	16	14
21	16	14
22	16	14
23	16	14
24	16	14
25	16	14
26	16	15
27	16	15
28	15	15
29	15	15
30	15	15
31	15	15

	Dry (%)
1	100
2	100
3	100
4	100
5	100
6	100
7	100
8	100
9	100
10	100
11	100
12	100
13	100
14	100
15	100
16	100
17	100
18	100
19	100
20	100
21	100
22	100
23	100
24	100
25	100
26	100
27	100
28	100
29	100
30	100
31	100