Iowa 7-Day Forecast: Highs Warm From 81°F to 88°F Through June 7

What changed

The National Weather Service forecast for central Iowa (Des Moines office) lays out a gradual warm-up for the first week of June:

| Day | High (°F) | Night Low (°F) | |---|---|---| | Monday, June 1 | 83 | 58 | | Tuesday, June 2 | 81 | 57 | | Wednesday, June 3 | 82 | 60 | | Thursday, June 4 | 85 | 64 | | Friday, June 5 | 86 | 65 | | Saturday, June 6 | 87 | 65 | | Sunday, June 7 | 88 | 66 |

Monday's high is forecast at 83°F with an overnight low of 58°F. Tuesday dips slightly to 81°F before the trend turns upward. By Thursday, highs reach 85°F and lows climb to 64°F. The weekend finishes warm — Saturday at 87°F and Sunday at 88°F, with overnight lows in the mid-60s.

Why it matters

This temperature range is favorable for corn growth. Daytime highs in the low-to-mid 80s early in the week support steady vegetative development, and the push toward the upper 80s later in the week adds growing degree day accumulation. Overnight lows staying above the mid-50s mean no frost concerns and continued nighttime growth. The gradual climb — rather than a sudden heat spike — is the kind of pattern that keeps crops moving without added stress.

What to watch next

• Weekend heat: Highs near 88°F on Sunday could push toward 90°F if the trend continues into the following week. That's worth watching for early-season heat stress, especially on lighter soils.
• Moisture: This forecast covers temperatures only. Keep an eye on precipitation outlooks — warm temps without rain could start tightening topsoil moisture.
• Updated forecasts: NWS forecasts update multiple times daily. Check back for any shifts, particularly in the Thursday–Sunday window.

Source notes

All temperature data comes from the U.S. National Weather Service API, Des Moines (DMX) forecast office, covering the central Iowa grid point. Data retrieved June 1, 2026.