Iowa 7-Day Forecast: Highs 75°F to 84°F Through June 18
What changed
The National Weather Service forecast for central Iowa (Des Moines grid point) lays out a mild-to-warm week:
| Day | High (°F) | Low (°F) | |---|---|---| | Thursday, Jun 11 | 79 | 57 | | Friday, Jun 12 | 83 | 63 | | Saturday, Jun 13 | 82 | 57 | | Sunday, Jun 14 | 75 | 55 | | Monday, Jun 15 | 78 | 55 | | Tuesday, Jun 16 | 79 | 58 | | Wednesday, Jun 17 | 84 | 64 |
The warmest day in the forecast is Wednesday at 84°F. The coolest overnight low is 55°F on Sunday and Monday nights. A slight cool-down arrives over the weekend before temperatures climb back into the low 80s by midweek.
Why it matters
Mid-June is a key stretch for corn moving through early vegetative stages and soybeans establishing canopy. Daytime highs in the upper 70s to low 80s and overnight lows above 50°F keep both crops in a comfortable growth window. There's no sign of the kind of 90°F-plus heat that can stress young plants or push soil moisture demand sharply higher. The cooler weekend lows near 55°F are still well above any frost concern — this is routine early-summer weather for Iowa.
What to watch next
- Mid-week warm-up: Wednesday's forecast high of 84°F is the warmest reading in this period. Worth watching whether that trend continues into the following week.
- Rainfall: Temperature is only half the picture. Check your local NWS forecast for precipitation chances — moisture availability could matter more than temps at this stage.
- GDD accumulation: These temperatures will keep growing degree day totals ticking along at a steady pace. Your local Extension office can help you track where your crop stands relative to normal.
Source notes
All temperature data from the U.S. National Weather Service API, Des Moines (DMX) grid point 73,49. Forecast issued for the period June 11–18, 2026.
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