Sioux Falls weather by month & the best time to visit
United States · regional city · hot-summer continental climate
The best time to visit Sioux Falls is July — its sunniest month (Sunshine Score 81/100), with September and August close behind. Sioux Falls averages about 2,583 hours of sunshine a year. Daytime highs around 31°C / 88°F and roughly 74 mm of rain in July.
When is the best time to visit Sioux Falls?
For sunshine, the best time to visit Sioux Falls is July, then September and August. The dullest month is January (0/100, 12 mm of rain). The full month-by-month picture is in the table below.
How sunny is Sioux Falls?
Sioux Falls gets a lot of sun: around 2,583 hours a year. 81 Sunshine Score points separate July (81) from January (0), so the month you pick matters. It ranks #177 of 580 destinations in United States for annual sunshine, above the national median of 2,279 hours. Rain has a clear season: the wettest stretch, around June, carries about 41% of the annual 668 mm.
Sunshine Score by month
| Month | Score | Day high | Night low | Rain | UV |
|---|---|---|---|---|---|
| January | 0 | -3° / 27°F | -12° / 10°F | 12 mm | 1 |
| February | 0 | -1° / 30°F | -11° / 12°F | 18 mm | 3 |
| March | 0 | 8° / 46°F | -4° / 25°F | 34 mm | 4 |
| April | 47 | 15° / 59°F | 2° / 36°F | 72 mm | 5 |
| May | 78 | 22° / 72°F | 9° / 48°F | 90 mm | 6 |
| June | 74 | 27° / 81°F | 15° / 59°F | 107 mm | 7 |
| July | 81 | 31° / 88°F | 18° / 64°F | 74 mm | 8 |
| August | 79 | 29° / 84°F | 16° / 61°F | 83 mm | 7 |
| September | 80 | 24° / 75°F | 12° / 54°F | 77 mm | 5 |
| October | 49 | 15° / 59°F | 3° / 37°F | 55 mm | 3 |
| November | 0 | 7° / 45°F | -3° / 27°F | 23 mm | 2 |
| December | 0 | -1° / 30°F | -10° / 14°F | 23 mm | 1 |
Nearest destinations
Head-to-head
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Sioux Falls: questions and answers
What kind of destination is Sioux Falls?
Sioux Falls is a regional city in United States at 432 m elevation with a hot-summer continental climate.
How many hours of sunshine does Sioux Falls get a year?
Sioux Falls gets about 2,583 hours of sunshine a year, at its best around July.
When is the best time to visit Sioux Falls?
The sunniest time to visit Sioux Falls is July, when the Sunshine Score peaks at 81/100 (with September and August close behind). Expect daytime highs around 31°C / 88°F.
What is the least sunny month in Sioux Falls?
January is the least sunny month in Sioux Falls, scoring 0/100 with about 12 mm of rain.
How strong is the sun in Sioux Falls?
The typical midday UV index in Sioux Falls peaks around 8 (very high) in July, 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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