Sioux City weather by month

Check out Sioux City weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.

Temperature
Rainfall
Sunshine & UV index

Temperature in Sioux City (°F)

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Max temperature (daytime)	28	34	46	63	73	82	88	84	75	64	46	30
Min temperature (night-time)	7	14	25	37	50	59	64	61	52	39	27	12
Heat & Humidity	0	0	0	0	0	M	H	M	0	0	0	0

Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme

Sunshine & UV index in Sioux City

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Daily hours of sunshine	6	6	7	8	9	10	11	10	8	7	5	5
Daily hours of daylight	9	11	12	13	15	15	15	14	12	11	10	9
UV Index (Maximum)	1	2	4	6	7	9	9	8	6	4	2	1

Rainfall in Sioux City

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Number of days with some rain	7	6	9	10	11	10	9	9	9	7	6	7
Average monthly rainfall (inches)	0.6	0.7	2.0	2.4	3.7	3.7	3.3	3.0	2.9	1.9	1.1	0.8

More about Sioux City

Sioux City by month

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

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The climate guide for Iowa (Sioux City) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

What's the climate like in Sioux City?

Sioux City has a cold climate with hot summers and some rainfall in all months.

Sioux City weather in January

Expect daytime maximum temperatures of 28°F in Sioux City, Iowa in January based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

28
28°F max day temperature
6
6 hours of sunshine per day
7
7 days with some rainfall
7
7°F min night temperature
9
9 hours of daylight per day
0
No heat & humidity
0.6
0.6 inches of monthly rainfall
1
1 (Low) UV index

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Sioux City weather in February

Expect daytime maximum temperatures of 34°F in Sioux City, Iowa in February based on long-term weather averages. There are 6 hours of sunshine per day on average, which might fall as snow.

34
34°F max day temperature
6
6 hours of sunshine per day
6
6 days with some rainfall
14
14°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
0.7
0.7 inches of monthly rainfall
2
2 (Low) UV index

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Sioux City weather in March

Expect daytime maximum temperatures of 46°F in Sioux City, Iowa in March based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 2.0 inches of rainfall in the month.

46
46°F max day temperature
7
7 hours of sunshine per day
9
9 days with some rainfall
25
25°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
2.0
2.0 inches of monthly rainfall
4
4 (Moderate) UV index

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Sioux City weather in April

Expect daytime maximum temperatures of 63°F in Sioux City, Iowa in April based on long-term weather averages. There are 8 hours of sunshine per day on average with 10 days with some rainfall and typically 2.4 inches of rainfall in the month.

63
63°F max day temperature
8
8 hours of sunshine per day
10
10 days with some rainfall
37
37°F min night temperature
13
13 hours of daylight per day
0
No heat & humidity
2.4
2.4 inches of monthly rainfall
6
6 (High) UV index

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Sioux City weather in May

Expect daytime maximum temperatures of 73°F in Sioux City, Iowa in May based on long-term weather averages. There are 9 hours of sunshine per day on average with 11 days with some rainfall and typically 3.7 inches of rainfall in the month.

73
73°F max day temperature
9
9 hours of sunshine per day
11
11 days with some rainfall
50
50°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.7
3.7 inches of monthly rainfall
7
7 (High) UV index

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Sioux City weather in June

Expect daytime maximum temperatures of 82°F in Sioux City, Iowa in June based on long-term weather averages. There are 10 hours of sunshine per day on average with 10 days with some rainfall and typically 3.7 inches of rainfall in the month.

82
82°F max day temperature
10
10 hours of sunshine per day
10
10 days with some rainfall
59
59°F min night temperature
15
15 hours of daylight per day
M
Moderate heat & humidity
3.7
3.7 inches of monthly rainfall
9
9 (Very High) UV index

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Sioux City weather in July

Expect daytime maximum temperatures of 88°F in Sioux City, Iowa in July and high heat and humidity based on long-term weather averages. There are 11 hours of sunshine per day on average with typically 3.3 inches of rainfall in the month.

88
88°F max day temperature
11
11 hours of sunshine per day
9
9 days with some rainfall
64
64°F min night temperature
15
15 hours of daylight per day
H
High heat & humidity
3.3
3.3 inches of monthly rainfall
9
9 (Very High) UV index

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Sioux City weather in August

Expect daytime maximum temperatures of 84°F in Sioux City, Iowa in August based on long-term weather averages. There are 10 hours of sunshine per day on average with typically 3.0 inches of rainfall in the month.

84
84°F max day temperature
10
10 hours of sunshine per day
9
9 days with some rainfall
61
61°F min night temperature
14
14 hours of daylight per day
M
Moderate heat & humidity
3.0
3.0 inches of monthly rainfall
8
8 (Very High) UV index

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Sioux City weather in September

Expect daytime maximum temperatures of 75°F in Sioux City, Iowa in September based on long-term weather averages. There are 8 hours of sunshine per day on average with typically 2.9 inches of rainfall in the month.

75
75°F max day temperature
8
8 hours of sunshine per day
9
9 days with some rainfall
52
52°F min night temperature
12
12 hours of daylight per day
0
No heat & humidity
2.9
2.9 inches of monthly rainfall
6
6 (High) UV index

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Sioux City weather in October

Expect daytime maximum temperatures of 64°F in Sioux City, Iowa in October based on long-term weather averages. There are 7 hours of sunshine per day on average with typically 1.9 inches of rainfall in the month.

64
64°F max day temperature
7
7 hours of sunshine per day
7
7 days with some rainfall
39
39°F min night temperature
11
11 hours of daylight per day
0
No heat & humidity
1.9
1.9 inches of monthly rainfall
4
4 (Moderate) UV index

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Sioux City weather in November

Expect daytime maximum temperatures of 46°F in Sioux City, Iowa in November based on long-term weather averages. There are 5 hours of sunshine per day on average.

46
46°F max day temperature
5
5 hours of sunshine per day
6
6 days with some rainfall
27
27°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
1.1
1.1 inches of monthly rainfall
2
2 (Low) UV index

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Sioux City weather in December

Expect daytime maximum temperatures of 30°F in Sioux City, Iowa in December based on long-term weather averages. There are 5 hours of sunshine per day on average, which might fall as snow.