Which is the hottest month in Sioux City?

The hottest time of year in Sioux City is normally July. Expect maximum daytime temperatures to reach 30°C with high heat and humidity.

Which month has the most rain in Sioux City?

In terms of rainfall, June is usually the wettest month in Sioux City with 115mm on average. There are normally 10 days in June with some rain.

When is it sunniest in Sioux City?

The sunniest time of year in Sioux City is normally July with bright sunshine on average for 73% of daylight hours; that's 11 hours of sunshine per day.

Best time to visit Sioux City

Q: When is the best time to visit Sioux City?

The best times to visit Sioux City, Iowa are in May, June and September Maximum daytime temperature = 22 - 30°C. Daily hours of sunshine = 8 hours or more.

The best times to visit Sioux City, Iowa are in May, June and September based on our default weather conditions. Update your weather preferences to see which months best match.

Sioux City by month

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

Recommended for Iowa

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When is the best time to visit Sioux City?

The best times to visit Sioux City, Iowa are in May, June and September based on the following average weather conditions.

Maximum daytime temperature = 72 - 86°F [remove]
Daily hours of sunshine = 8 hours or more [remove]

Change the criteria to reflect your weather preferences.

2
Jan
2
Feb
2.5
Mar
3
Apr
5
May
5
Jun
4
Jul
4.5
Aug
5
Sep
3.5
Oct
1.5
Nov
1.5
Dec

Change criteria

Max Day Temperature (°F)

28
Jan
34
Feb
46
Mar
63
Apr
73
May
82
Jun
88
Jul
84
Aug
75
Sep
64
Oct
46
Nov
30
Dec

Hours of Sunshine (daily)

6
Jan
6
Feb
7
Mar
8
Apr
9
May
10
Jun
11
Jul
10
Aug
8
Sep
7
Oct
5
Nov
5
Dec

Best time to visit

Destination

Daytime temperature

Sunshine hours

Sea temperature

Monthly rainfall

Days with some rain

Heat & humidity

The weather guide for Iowa (Sioux City) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.

Metric (°C) | Imperial (°F)