It is very hard to ,state ,one sentence fit all cultivars.
Because not all cultivars need same temperature to ripe.
Early ripening cultivar will keep ripening till after frost:
Ex:Malta Black,Improved Celeste,Adriatic JH,Nero 600 M Takoma Violet.
Others need 70 in the day and 50 in the night to continue ripening in the Fall.
Ex:Madeira Black,Ischia Black Sal Corleone, Longue D'Aout, Col de Dame,etc
Fall need to be warm to ripe late cultivars in zone 7,6,and 5.