1963 hit that fittingly charted in summertime, 8 letters
1975 Linda Ronstadt hit, 8 letters
A big one hit Russia in summer 2010, 8 letters
Dog days phenomenon, 8 letters
Martha & the Vandellas hit redone by Linda Ronstadt, 8 letters
Martha & the Vandellas smash, 8 letters
Run of 95-degree days, 8 letters
Spell of sultry weather, 8 letters
Stretch in the 90's, say, 8 letters
Stretch in the 90s, e.g., 8 letters