Ohio 7-Day Forecast: Highs Climb From 65°F to Mid-80s Through Late May

What changed

The National Weather Service forecast for Ohio (ILN grid point) lays out a clear warming trend over the next six days:

• Thursday night (overnight): Low of 53°F
• Friday: High of 65°F
• Friday night: Low of 60°F
• Saturday: High of 77°F
• Sunday: High of 82°F
• Memorial Day (Monday): High of 81°F
• Tuesday: High of 83°F
• Wednesday: High of 84°F

From Friday's 65°F to Wednesday's 84°F, that's a 19-degree jump in daytime highs across the period.

Why it matters

Late May warmth in this range could push growing degree day (GDD) accumulation along quickly for both corn and soybeans. Overnight lows staying above 53°F — and climbing toward 60°F — mean soil temperatures may hold warmth between days, which matters for root development and early-season growth. The stretch from Sunday through Wednesday, with highs in the low-to-mid 80s, is the kind of run that can move V-stage corn along noticeably.

For fields still waiting on planting or replanting, warmer soils and longer drying windows could open up opportunities — though local rainfall and field conditions will vary.

What to watch next

• Rainfall forecasts for the weekend and early next week. Warm temps paired with moisture could either help emergence or complicate field access, depending on amounts and timing.
• Soil temperature readings at your local stations. Check whether 4-inch soil temps are tracking with the air-temperature warm-up.
• Extended outlook beyond Wednesday. Whether the 80s hold or a front drops temps back will shape the GDD picture heading into June.

Source notes

All temperature data from the U.S. National Weather Service API (ILN grid point 85,81 forecast), accessed May 25, 2026.