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 in Sioux City (°F)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
28°F maximum daytime temperature in January in Sioux City28
34°F maximum daytime temperature in February in Sioux City34
46°F maximum daytime temperature in March in Sioux City46
63°F maximum daytime temperature in April in Sioux City63
73°F maximum daytime temperature in May in Sioux City73
82°F maximum daytime temperature in June in Sioux City82
88°F maximum daytime temperature in July in Sioux City88
84°F maximum daytime temperature in August in Sioux City84
75°F maximum daytime temperature in September in Sioux City75
64°F maximum daytime temperature in October in Sioux City64
46°F maximum daytime temperature in November in Sioux City46
30°F maximum daytime temperature in December in Sioux City30
Min temperature (night-time)
7°F minimum night-time temperature in January in Sioux City7
14°F minimum night-time temperature in February in Sioux City14
25°F minimum night-time temperature in March in Sioux City25
37°F minimum night-time temperature in April in Sioux City37
50°F minimum night-time temperature in May in Sioux City50
59°F minimum night-time temperature in June in Sioux City59
64°F minimum night-time temperature in July in Sioux City64
61°F minimum night-time temperature in August in Sioux City61
52°F minimum night-time temperature in September in Sioux City52
39°F minimum night-time temperature in October in Sioux City39
27°F minimum night-time temperature in November in Sioux City27
12°F minimum night-time temperature in December in Sioux City12
Heat & Humidity
No heat & humidity in January in Sioux City0
No heat & humidity in February in Sioux City0
No heat & humidity in March in Sioux City0
No heat & humidity in April in Sioux City0
No heat & humidity in May in Sioux City0
Moderate heat & humidity in June in Sioux CityM
High heat & humidity in July in Sioux CityH
Moderate heat & humidity in August in Sioux CityM
No heat & humidity in September in Sioux City0
No heat & humidity in October in Sioux City0
No heat & humidity in November in Sioux City0
No heat & humidity in December in Sioux City0

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

Sunshine & Daylight in Sioux City

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Daily hours of sunshine
Daily hours of daylight
9 hours of daylight per day in January in Sioux City9
11 hours of daylight per day in February in Sioux City11
12 hours of daylight per day in March in Sioux City12
13 hours of daylight per day in April in Sioux City13
15 hours of daylight per day in May in Sioux City15
15 hours of daylight per day in June in Sioux City15
15 hours of daylight per day in July in Sioux City15
14 hours of daylight per day in August in Sioux City14
12 hours of daylight per day in September in Sioux City12
11 hours of daylight per day in October in Sioux City11
10 hours of daylight per day in November in Sioux City10
9 hours of daylight per day in December in Sioux City9
UV Index (Maximum)
UV (maximum) index 1 (Low) in January in Sioux City1
UV (maximum) index 2 (Low) in February in Sioux City2
UV (maximum) index 4 (Moderate) in March in Sioux City4
UV (maximum) index 6 (High) in April in Sioux City6
UV (maximum) index 7 (High) in May in Sioux City7
UV (maximum) index 9 (Very High) in June in Sioux City9
UV (maximum) index 9 (Very High) in July in Sioux City9
UV (maximum) index 8 (Very High) in August in Sioux City8
UV (maximum) index 6 (High) in September in Sioux City6
UV (maximum) index 4 (Moderate) in October in Sioux City4
UV (maximum) index 2 (Low) in November in Sioux City2
UV (maximum) index 1 (Low) in December in Sioux City1

Rainfall in Sioux City

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Number of days with some rain
7 days with some rainfall in January in Sioux City7
6 days with some rainfall in February in Sioux City6
9 days with some rainfall in March in Sioux City9
10 days with some rainfall in April in Sioux City10
11 days with some rainfall in May in Sioux City11
10 days with some rainfall in June in Sioux City10
9 days with some rainfall in July in Sioux City9
9 days with some rainfall in August in Sioux City9
9 days with some rainfall in September in Sioux City9
7 days with some rainfall in October in Sioux City7
6 days with some rainfall in November in Sioux City6
7 days with some rainfall in December in Sioux City7
Average monthly rainfall (inches)
0.6 inches monthly rainfall in January in Sioux City0.6
0.7 inches monthly rainfall in February in Sioux City0.7
2.0 inches monthly rainfall in March in Sioux City2.0
2.4 inches monthly rainfall in April in Sioux City2.4
3.7 inches monthly rainfall in May in Sioux City3.7
3.7 inches monthly rainfall in June in Sioux City3.7
3.3 inches monthly rainfall in July in Sioux City3.3
3.0 inches monthly rainfall in August in Sioux City3.0
2.9 inches monthly rainfall in September in Sioux City2.9
1.9 inches monthly rainfall in October in Sioux City1.9
1.1 inches monthly rainfall in November in Sioux City1.1
0.8 inches monthly rainfall in December in Sioux City0.8

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.

Metric (°C)  |  Imperial (°F)

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Tropical storm risk: Sioux City, Iowa hurricane season

% of month affected by tropical storms
0
0
0
0
0
0
0
0
0
0
0
0
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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More about the USA

Compare Sioux City with the USA

Below the Sioux City chart shows average maximum daytime temperature for Sioux City, Iowa, USA and the USA (Washington).

Maximum daytime temperature (°F)

Sioux City, Iowa, USA
USA (Washington)
41
34
45
46
55
63
66
73
75
82
84
88
88
84
86
75
79
64
68
46
57
46
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
28
30

Metric (°C)  |  Imperial (°F)

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