My speckled King also quits eating in August. Last year he resumed eating in February, and the year previously he started eating again at the very end of March.
Ambient temp in the snake room never gets much below 80 F, so it's not a temp thing with him. He stays fairly active and never gets too skinny during his fast. I feed him 2-3 mice per week when he IS eating, and even when he's not, I offer him a f/t mouse at least once a month until he starts feeding again.
I don't know the age or sex of this snake. He was given to me about two years ago by a wildlife educator who had had him in her collection for at least 6 years. I worried that first year, as he did not eat for me at all until almost four months to the day after I got him (and I didn't know how long it had been since he had eaten previously). Last year when he stopped eating, I kind of knew what to expect. This year, he abruptly stopped eating after his last meal in July. I offered mice twice in August, and once this month. He's just not hungry. It's just what he does.