Weather in Sioux Falls in June

A good month. June is a solid month to be in Sioux Falls. Highs average 27 °C, lows 15 °C, and rain falls on 14 days — nothing in the month is working against you.

June ranks 3 of 12 in Sioux Falls. Only September scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain on 14 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: 6 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest June day reached 39.4 °C and the coldest night fell to 5.6 °C, and the wettest single day dropped 48 mm — roughly 45% of the month's rain in one day.

June is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest June on record still delivered 205 mm against 28 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 106 mm average is a reasonable planning figure, not a promise.

Wind is light at 11.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 68%.

How June sits in the year

The month is on the way up: 5.6 °C warmer than May, and July adds another 3.7 °C. Late in the month feels noticeably different from the start of it, which is worth knowing if the trip is short.

Daylight in June

June is at or near the longest days of Sioux Falls's year: 15.4 hours of daylight, holding steady all month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

Sioux Falls has no sea to moderate it, and it shows: 43 °C separates the hottest afternoon of the year from the coldest night. That is a genuinely continental range, and it means summer and winter here are barely the same place.

How busy it gets

Busy. Popular without being frantic; book the things you care about, improvise the rest.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

June in Sioux Falls versus nearby

If Sioux Falls is one option among several, the nearby comparison is worth making. Omaha is the weaker option in June — within a degree on temperature, the same number of rain days. Minneapolis is close enough to be a coin toss — within a degree on temperature, the same number of rain days.

So: June works, with September the better month by 10 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Sioux Falls

See all twelve months in Sioux Falls, or where else to go in June.