The boyband sparked talk of a reunion after their website was updated for the first time in ten years, according to RumorFix.
The band, which includes Nick Lachey, Drew Lachey, Jeff Timmons and Justin Jeffre, will reportedly embark on a 15-city tour between July and August.
Timmons previously hinted at a reunion in February when he told a Philippines news outlet that discussions were under way.
"We've been talking of 98 Degrees getting back together for a reunion show," he said. "Nothing's out of the question but nothing's solidified. We'll see."
Nick is expecting his first child with wife Vanessa Lachey. The two wed in July 2011 after nearly five years of dating.
Watch the video for 98 Degrees' 'I Do (Cherish You)' below: