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 (°C)

  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Max temperature (daytime)
-2°C maximum daytime temperature in January in Sioux City-2
1°C maximum daytime temperature in February in Sioux City1
8°C maximum daytime temperature in March in Sioux City8
17°C maximum daytime temperature in April in Sioux City17
23°C maximum daytime temperature in May in Sioux City23
28°C maximum daytime temperature in June in Sioux City28
31°C maximum daytime temperature in July in Sioux City31
29°C maximum daytime temperature in August in Sioux City29
24°C maximum daytime temperature in September in Sioux City24
18°C maximum daytime temperature in October in Sioux City18
8°C maximum daytime temperature in November in Sioux City8
-1°C maximum daytime temperature in December in Sioux City-1
Min temperature (night-time)
-14°C minimum night-time temperature in January in Sioux City-14
-10°C minimum night-time temperature in February in Sioux City-10
-4°C minimum night-time temperature in March in Sioux City-4
3°C minimum night-time temperature in April in Sioux City3
10°C minimum night-time temperature in May in Sioux City10
15°C minimum night-time temperature in June in Sioux City15
18°C minimum night-time temperature in July in Sioux City18
16°C minimum night-time temperature in August in Sioux City16
11°C minimum night-time temperature in September in Sioux City11
4°C minimum night-time temperature in October in Sioux City4
-3°C minimum night-time temperature in November in Sioux City-3
-11°C minimum night-time temperature in December in Sioux City-11
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 (mm)
14 mm monthly rainfall in January in Sioux City14
18 mm monthly rainfall in February in Sioux City18
50 mm monthly rainfall in March in Sioux City50
60 mm monthly rainfall in April in Sioux City60
93 mm monthly rainfall in May in Sioux City93
95 mm monthly rainfall in June in Sioux City95
83 mm monthly rainfall in July in Sioux City83
75 mm monthly rainfall in August in Sioux City75
73 mm monthly rainfall in September in Sioux City73
49 mm monthly rainfall in October in Sioux City49
27 mm monthly rainfall in November in Sioux City27
20 mm monthly rainfall in December in Sioux City20

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 / mm)  |  Imperial (°F / inches)

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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 (°C)

Sioux City, Iowa, USA
USA (Washington)
5
1
7
8
13
17
19
23
24
28
29
31
31
29
30
24
26
18
20
8
14
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
-2
-1

Metric (°C / mm)  |  Imperial (°F / inches)

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