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.
Get the WASDE in your inbox — minutes after USDA drops it.
Every supply-and-demand table that moved, with the underlying USDA links. Free. Unsubscribe anytime.
More from this desk
- Weather · July 17, 2026Iowa 7-Day Forecast: Sustained Heat — Highs 92°F to 96°F Through July 22
Iowa is looking at a prolonged heat run: daytime highs of 92°F to 96°F from Thursday through Monday, with overnight lows mostly in the low-to-mid 70s. Tuesday eases to 87°F. That's five consecutive days above 90°F during peak corn pollination and early soybean pod-set timing.
- Weather · July 16, 2026Iowa 7-Day Forecast: Highs 92°F to 97°F Through July 20
Iowa's NWS forecast shows daytime highs ranging from 92°F today (July 13) up to 97°F on Friday, with no real break in sight through Sunday, July 20. Overnight lows hold in the 68–75°F range, which limits nighttime cooling for corn and soybeans during a critical stretch of the growing season.
- Weather · July 14, 2026Iowa 7-Day Forecast: Highs Climb From 89°F to 96°F Through July 18
Central Iowa daytime highs start at 89°F today (July 12) and ramp up to 95–96°F from Wednesday through Saturday, with overnight lows mostly in the low-to-mid 70s. That's a sustained heat stretch landing right in the corn pollination window.
- Weather · July 12, 2026Iowa 7-Day Forecast: Highs in the Mid-80s to 90°F Through July 11
Central Iowa daytime highs run 85–90°F through Friday, July 11, with overnight lows in the mid-to-upper 60s. Wednesday, July 8, is the warmest day in the forecast at 90°F.