Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
Sioux City Weather in September
With daytime temperatures of 25°C (77°F) and nighttime lows of 11°C (52°F), September in Sioux City brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 70 mm (2.8 in) falls on average.
Rainfall in Sioux City in September
Historically, approximately 9 days this month are expected to have rain, averaging 70 mm (2.8 in). Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.
Temperature in Sioux City in September
September tends to be one of the excellent months in Sioux City, with 25°C (77°F) in the afternoon and 11°C (52°F) overnight. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. At 11°C (52°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Sioux City Temperature in September
Min Temperature
11°C (52°F)
Max Temperature
25°C (77°F)
Chance of Rain
30%
Precipitation
70 mm (2.8 in)
Rainy days
9 days
Sioux City Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sioux City - and find the best time to visit.
Best Places in the United States of America in September
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Sioux City in September
For Sioux City in September, you'll want flexible clothing. It's wise to pack cotton shirts, comfortable shorts, and a pair of jeans for cooler evenings. A light sweater or jacket is useful for air-conditioned spaces (like buses) or unexpected cool moments. Rain is likely on several days, so bring a good rain jacket.
What To Do in Sioux City in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Cycling9/10 -
Walking9/10 -
Camping8/10 -
Outdoor sports9/10
Sioux City 3-Day Forecast
More climate data for Sioux City
See the full Sioux City climate overview or explore weather in the United States of America.
Popular in September
Where to go in September - average daytime high across popular destinations.
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