Weather in Des Moines in July

Shoulder season. July is shoulder season in Des Moines — cheaper, quieter, and a genuine gamble. Highs average 30.5 °C, lows 19.1 °C, and rain falls on 12 days — nothing in the month is working against you.

July ranks 7 of 12 in Des Moines: past the worst of the year but short of September, which is the month to book if the dates are open.

Rain on 12 days, 3 of them heavy. Enough to need a plan B, not enough to need a plan around it. Pack for 30.5 °C days and 19.1 °C nights; the spread matters more here than any single number.

What the averages hide

Averages flatten a month, and this one hides a few things: 15 days top 30 °C — hot spells arrive, but they break. Across the twenty years measured, the hottest July day reached 42.7 °C and the coldest night fell to 10.3 °C, and the wettest single day dropped 59 mm — roughly 63% of the month's rain in one day.

July is moderately variable: 25 mm in the driest year against 218 mm in the wettest, around an average of 94 mm. Roughly two Julys in three land near that average, and the third does something else entirely.

Wind is light at 8.7 km/h, so the temperature on the page is close to the temperature on your skin, and humidity is unremarkable at 70%.

How July sits in the year

This is a turning point in the year — June and August sit on opposite sides of it, so the month contains the change rather than following it.

Daylight in July

July is at or near the longest days of Des Moines's year: 14.9 hours of daylight, losing 0.7 hours across the month. Evenings are the real gain — dinner outdoors still happens in full light.

An inland climate

Des Moines has no sea to moderate it, and it shows: 40.3 °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.

July in Des Moines versus nearby

If Des Moines is one option among several, the nearby comparison is worth making. Omaha is close enough to be a coin toss — within a degree on temperature, the same number of rain days. Kansas City is close enough to be a coin toss — within a degree on temperature, 1 day less rain.

So: July is a compromise. September is 19 points better and is what Des Moines is actually like at its best — worth moving the trip for if that is possible, and worth adjusting expectations for if it is not.

Every month in Des Moines

See all twelve months in Des Moines, or where else to go in July.