Iowa Current Conditions: 66°F With a Tight Dew Point Spread at Des Moines

What changed

The latest National Weather Service observation at Des Moines International Airport (KDSM), recorded at 14:35 UTC (9:35 a.m. CT) on June 11, 2026, shows:

• Temperature: 66.2°F
• Dew point: 64.4°F
• Wind speed: about 11.5 mph
• Barometric pressure: 29.62 inches of mercury

The temperature-dew point spread of roughly 1.8°F points to near-saturated air at the surface.

Why it matters

When the dew point runs that close to the air temperature, relative humidity is in the 90%+ range. For corn and soybeans in the vegetative growth stages of mid-June, prolonged high humidity can favor fungal diseases like gray leaf spot in corn or white mold in soybeans later in the season. It also means morning dew may linger on leaves longer than usual.

Light winds around 11.5 mph provide some canopy air movement, but with this much moisture in the air, leaf wetness periods could still be extended. Barometric pressure at 29.62 inches of mercury is in a normal range — no strong storm system signal in this single reading alone.

What to watch next

• Afternoon heating: If temperatures climb and the dew point stays in the mid-60s, the spread will widen and humidity will drop — check your local forecast for the afternoon outlook.
• Overnight lows: If the air temperature drops to or below the dew point tonight, fog and heavy dew are likely, extending leaf wetness hours.
• Disease scouting: With humidity this high in early-to-mid June, it may matter to keep an eye on early-season foliar disease symptoms as the canopy fills in. Talk with your local agronomist or Extension office about scouting schedules.

Source notes

All four observations — temperature, dew point, wind speed, and barometric pressure — come from the U.S. National Weather Service API for station KDSM, recorded at 2026-06-11T14:35:00 UTC. These are point-in-time readings from a single station and represent conditions at Des Moines, not the entire state of Iowa.