The lion in summer?

LEO

This zodiac sign roars with pride and rules the sky from late July to late August.

This clue plays on two meanings of "lion." First, it hints at the zodiac sign Leo, which is represented by a lion. The phrase "in summer" points to Leo being a summer constellation (typically July 23–August 22), reinforcing the answer. It’s a clever double meaning where the animal and the astrological sign share the same name.