Indiana 7-Day Forecast: Highs Climb From 67°F to Mid-80s by Late May

What changed

The National Weather Service forecast for central Indiana (Indianapolis grid point) lays out a clear temperature ramp over the next seven days:

| Period | Forecast temp | |---|---| | Thursday night (tonight) | Low 54°F | | Friday | High 67°F | | Friday night | Low 61°F | | Saturday | High 76°F | | Saturday night | Low 61°F | | Sunday | High 79°F | | Sunday night | Low 62°F | | Memorial Day (Monday) | High 82°F | | Monday night | Low 64°F | | Tuesday | High 83°F | | Tuesday night | Low 67°F | | Wednesday | High 84°F | | Wednesday night | Low 67°F | | Thursday | High 84°F |

From Friday's 67°F high to Thursday's 84°F high, that's a 17-degree jump in daytime temperatures across the period. Overnight lows climb from 54°F tonight to 67°F by midweek.

Why it matters

For corn that's already in the ground, warmer days and nights in the upper 60s mean faster GDD accumulation — the kind of stretch that can move early-planted corn from emergence through V2 or V3 in a hurry. Soybeans planted in mid-May could see quicker emergence and early node development under these conditions.

The overnight lows are worth watching too. Lows staying above 60°F through the weekend and climbing to 67°F by Tuesday night mean soil temperatures could hold warm enough overnight to keep seedlings pushing. No frost risk appears in this forecast window.

What to watch next

• Updated forecasts later this week. NWS forecasts shift, especially in the 5–7 day range. Check back for any changes to the Wednesday–Thursday outlook.
• Rainfall. Temperature is only half the picture. If you're tracking fieldwork windows or emergence, pair this forecast with local precipitation outlooks.
• GDD calculators. If you track accumulated GDDs, this warm stretch may matter for staging and timing any post-emergence field checks.

Source notes

All temperature data from the U.S. National Weather Service API, Indianapolis grid point (IND 58,69), accessed May 25, 2026.