After a slightly cool early June, summer weather warmed up to 99 degrees Sunday, and temperatures may reach triple digits this week.
Each day between Wednesday and Sunday exceeded 90 degrees, with Sunday's temperature just under 100 degrees, according to data from the National Weather Service's Morristown office.
That's lower than the record of 101 set in 1988, but the string of hot days has brought the monthly average back to normal after the early part of June was as much as 8 degrees cooler than usual.
Average highs in late June tend to hover around 90 degrees, NWS records show.
Around town, people did what they could to beat the Sunday heat. The Singer family came from Bell Buckle, Tenn., and enjoyed the frozen lemonade at the Chattanooga Market before heading out to the crowded fountain at Coolidge Park with 5-year-old daughter Kylie.
"We wanted to come just for this," Rachel Singer said.
"For this time of year, it's a little hotter," her husband, Nathan, said. "I wish I had brought my swimming trunks."
Kate Guillet with the weather service said weak cold front coming in today will push temperatures down, but only to the upper 80s and only for a few days. By Thursday and Friday, temperatures will likely be in the upper 90s again, she said.
WRCB chief meteorologist Paul Barys has forecast an even hotter weekend, predicting highs of 100 degrees for both Saturday and Sunday, just short of the daily records of 103 and 101 degrees, respectively.
Weather also has been affected by an unseasonably dry June, and more than 60 percent of all rain this month fell in a single storm on the 10th and 11th.
"It just seems drier ... seems pretty dusty," Sam Lubben said at the park, where he watched his daughter Talitha splashing in the fountain.
"The grass has slowed down," he added. "I'm not mowing as much."