Iowa 7-Day Forecast: Highs Climb From 84°F Thursday to 94°F by Tuesday
What changed
The National Weather Service forecast for central Iowa (Des Moines area) shows a clear upward temperature trend over the next seven days:
| Day | High (°F) | Low (°F) | |---|---|---| | Today (Wed, Jul 8) | 92 | 70 | | Thursday, Jul 9 | 84 | 67 | | Friday, Jul 10 | 85 | 68 | | Saturday, Jul 11 | 86 | 68 | | Sunday, Jul 12 | 89 | 69 | | Monday, Jul 13 | 92 | 71 | | Tuesday, Jul 14 | 94 | 73 |
Today's high of 92°F gives way to a brief dip Thursday and Friday into the mid-80s, then temperatures climb steadily. By Tuesday, the forecast high reaches 94°F — the warmest day in the outlook. Overnight lows also trend warmer, moving from 67°F Thursday night up to 73°F Tuesday night.
Why it matters
Mid-July is prime pollination time for much of Iowa's corn crop. Daytime highs in the low-to-mid 90s by themselves don't automatically mean trouble, but they're worth watching closely — especially if humidity pushes heat index values higher or if soil moisture is already short in your area. The rising overnight lows (reaching 73°F by Tuesday night) also matter because warm nights limit the plant's ability to recover from daytime heat.
Soybeans are generally more heat-tolerant at this growth stage, but prolonged heat combined with dry conditions could affect flowering and pod set later in July.
What to watch next
- Updated NWS forecasts later this week — the Tuesday 94°F high is six days out and could shift.
- Rainfall chances — the forecast data here covers temperature only. Whether rain accompanies or follows this heat ramp could change the picture significantly.
- Local conditions — temperatures vary across Iowa. Check your county-level forecast for a tighter read on your fields.
Source notes
All temperature data from the U.S. National Weather Service API, Des Moines (DMX) grid point 73,49. Forecast retrieved July 8, 2026.
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