Columbus, Ohio – Temperatures will climb into the upper 80s by Thursday afternoon, pushing near 90°F and bringing a summerlike stretch of heat across Indiana and Ohio before a transition to stormier conditions.
According to the National Weather Service and NOAA’s Climate Prediction Center, both states are in a 70 to 80 percent probability zone for above-normal temperatures from April 16 through April 20. A broad heat dome over the Ohio Valley will dominate early, allowing temperatures to steadily rise through the late week.
In Columbus and across Franklin, Delaware, and Licking counties, highs are expected to reach 87 to 90°F between 2 p.m. and 6 p.m., with overnight lows holding in the mid to upper 60s. In Indiana, Indianapolis and surrounding counties including Marion and Hamilton will see similar highs in the upper 80s under strong sunshine.
Along the I-70 corridor from Indianapolis through Dayton to Columbus, increasing southwest winds could gust between 25 and 35 mph, accelerating early vegetation drying before moisture returns. Fire risk may briefly increase before conditions shift.
The precipitation outlook shows a 40 to 50 percent chance of above-normal rainfall developing between April 18 and April 22. Thunderstorms are expected to increase in coverage, with the potential for heavy rainfall, gusty winds, and localized flooding, especially along and south of I-70.
Residents should stay hydrated during peak heat, secure loose outdoor items, and remain alert for rapidly changing weather late in the period. Drivers should be prepared for sudden downpours and reduced visibility.
The most consistent heat is expected through April 18, followed by increasing storm chances into early next week. Additional advisories are likely as the pattern shifts from dry heat to a more active storm setup.
