Meteorologists say fall begins Sept. 1, but another round of summer heat will usher in the new month.
According to the National Weather Service in Wilmington, the heat index could reach 104 degrees in Greater Cincinnati.
Much of the region is under aheat advisory from 2 p.m. Tuesday through 8 p.m. Thursday as high temperatures and humidity increase the risk of heat-related illness.
Officials urge residents to drink plenty of fluids, stay in air-conditioned spaces, avoid prolonged sun exposure, wear lightweight, loose-fitting clothing and check on relatives and neighbors.
Anyone spending time outdoors should take extra precautions and limit strenuous activity to the early morning or evening hours. Seek medical attention if symptoms of heat exhaustion
or heat stroke develop.
Heat advisory conditions could continue into Friday, especially across southern counties. A gradual cooldown is expected over the weekend, with temperatures returning closer to normal early next week.
Strong to severe storms are possible Thursday afternoon and evening. Atmospheric instability could also lead to stronger storms Friday evening. Some instability could also lead to stronger storms on Friday.
Storms may develop into the area Thursday afternoon and evening. At this point in time, it is highly uncertain if that will occur. But if it does, conditions will be favorable for some strong to severe storms. pic.twitter.com/wnfuiQQqi3
— NWS Wilmington OH (@NWSILN) September 1, 2026
Cincinnati 7-day detailed weather forecast
Tuesday: Sunny and hot, with a high near 97. Heat index values as high as 104. Calm wind becoming west 5 to 7 mph in the morning.
Tuesday night: Mostly clear, with a low of around 73. Calm wind.
Wednesday: Sunny and hot, with a high near 97. Heat index values as high as 104. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday night: Clear, with a low of around 73. Calm wind.
Thursday: Sunny and hot, with a high near 97. Calm wind becoming west 5 to 7 mph in the afternoon.
Thursday night: Mostly clear, with a low of around 75.
Friday: Sunny, with a high near 95.
Friday night: Partly cloudy, with a low of around 72.
Saturday: Mostly sunny, with a high near 92.
Saturday night: Partly cloudy, with a low of around 70.
Sunday: Mostly sunny, with a high near 87.
Sunday night: Partly cloudy, with a low of around 66.
Monday (Labor Day): Sunny, with a high near 87.
Source: National Weather Service in Wilmington
This article originally appeared on Cincinnati Enquirer: Fall arrives, but summer isn't done. Cincinnati heat index to hit 104
