Left this bowling ball out in the Texas summer heat. Temperature was in the high 90s. Took several days to produce this crack. No, this was not done with a new ball, but it will work on even the newest balls. Tried to pry the halves apart with a couple of big screwdrivers to no avail.
On the opposite end, I left a ball that had been plugged in the trunk of my car in Colorado on a night when the temperature reached -26 degrees Fahrenheit. The plugs popped up nearly half inch and could not be driven back into the ball.
This said that bowling balls were not tolerant of either hot or cold.