Written and first recorded by Walter Egan (US #55/CAN #56 1978).
Other hit version by Night (US #18/CAN #23/AUS #3/NZ #28/NETH #21 1979).
From the wiki: “Walter Egan wrote and first released ‘Hot Summer Nights’ (produced by Fleetwood Mac’s Lindsey Buckingham) in 1978 for his album Not Shy. Released as the album’s second promotional single (US #8 ‘Magnet and Steel’ was first), ‘Hot Summer Nights’ peaked at #55 on the Billboard Hot 100.