Monday, June 13, hit a record-breaking high on 97 degrees.
Meteorologist Matt Reagan, with the National Weather Service Office in Old Hickory, said the prior record high was 96 degrees in 1880.
"Monday broke the old record," he explained. "That's warmer than normal (for this time of year). For example, our normal temperature high would be around 86 degrees - and that's about 10 to 12 degrees above normal."
Reagan said that the weather will be slightly cooler beginning Friday. "Cooler, being a relative term," he said. A cold front, scheduled to arrive Thursday night, will keep temperatures in the high 80s/low 90s on Saturday and Sunday.
The cool front followed the high winds and severe thunderstorms that blew through the Midstate on Wednesday evening.
"Even though we are not cooling off a bunch, the dew points will be lower," Reagan added. "Friday they will be down into the mid-60s. Even though it is 90 degrees, you will feel a difference."
Although the summer heat brings opportunities for fun outdoor activities - like picnicking or going to the pool or lake - folks should always take caution to avoid overheating.
Lebanon Police Department PIO PJ Hardy said they have not yet received any heat-related emergency calls.
"We always want to make sure that people stay aware of the heat index. It may register 95 degrees, but the heat index is over 100 - so double check in situations like that," he said.
Hardy advised to make sure your vehicle is properly maintained because summer conditions can be "brutal on your car."
"Always protect your children and don't leave children or pets in vehicles," he said.
Hardy also noted that citizens should check on their elderly family members and neighbors to make sure they stay cool. "Some of these folks are on a fixed budget and don't want to run the air conditioning and just have fans," he said.