Sioux City weather by month & the best time to visit
United States · small town · hot-summer continental climate
The best time to visit Sioux City is July — its sunniest month (Sunshine Score 79/100), with September and August close behind. Sioux City averages about 2,558 hours of sunshine a year. Daytime highs around 31°C / 88°F and roughly 80 mm of rain in July.
When is the best time to visit Sioux City?
For sunshine, the best time to visit Sioux City is July, then September and August. The dullest month is January (0/100, 16 mm of rain). The full month-by-month picture is in the table below.
How sunny is Sioux City?
Sioux City gets a lot of sun: around 2,558 hours a year. 79 Sunshine Score points separate July (79) from January (0), so the month you pick matters. It ranks #182 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. The year's 750 mm of rain spreads fairly evenly across the months, with no pronounced dry season.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | -1° / 30°F | -11° / 12°F | 16 mm | 1 |
| February | 0 | 1° / 34°F | -10° / 14°F | 21 mm | 3 |
| March | 7 | 9° / 48°F | -3° / 27°F | 41 mm | 4 |
| April | 53 | 16° / 61°F | 3° / 37°F | 78 mm | 5 |
| May | 75 | 22° / 72°F | 10° / 50°F | 104 mm | 6 |
| June | 73 | 28° / 82°F | 16° / 61°F | 113 mm | 8 |
| July | 79 | 31° / 88°F | 19° / 66°F | 80 mm | 8 |
| August | 77 | 30° / 86°F | 17° / 63°F | 95 mm | 7 |
| September | 79 | 25° / 77°F | 13° / 55°F | 83 mm | 5 |
| October | 55 | 16° / 61°F | 4° / 39°F | 60 mm | 3 |
| November | 0 | 8° / 46°F | -2° / 28°F | 30 mm | 2 |
| December | 0 | 0° / 32°F | -8° / 18°F | 29 mm | 1 |
Nearest destinations
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Sioux City: questions and answers
What kind of destination is Sioux City?
Sioux City is a small town in United States at 333 m elevation with a hot-summer continental climate.
How many hours of sunshine does Sioux City get a year?
Sioux City gets about 2,558 hours of sunshine a year, at its best around July.
When is the best time to visit Sioux City?
The sunniest time to visit Sioux City is July, when the Sunshine Score peaks at 79/100 (with September and August close behind). Expect daytime highs around 31°C / 88°F.
What is the least sunny month in Sioux City?
January is the least sunny month in Sioux City, scoring 0/100 with about 16 mm of rain.
How strong is the sun in Sioux City?
The typical midday UV index in Sioux City peaks around 8 (very high) in June, easing to about 1 (low) in January. Month-by-month midday UV values are in the UV column of the table on this page.
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