The general pattern repeats every year
Late January through mid-February, September into early October before Halloween events ramp up, and early December before the winter holiday crowds arrive all tend to run lighter and cooler than the rest of the year. Summer and the weeks around major U.S. holidays run hottest and busiest, which tends to mean longer waits and higher prices across the board.
Why exact dates still matter even though the pattern is stable
Specific discount windows, special event calendars, and even holiday timing shift from year to year — a date that fell in a quiet week last year might overlap with a special event or holiday shift the next. The shape of the calendar is reliable; the exact dates within it are not, which is why checking the current year's calendar against your actual travel dates is still worth the time even if you know the general pattern.
Weather is part of the timing decision too
Central Florida's summer heat and afternoon thunderstorms are a real factor for families with young kids or anyone sensitive to heat. The cooler months aren't just less crowded — for a lot of families, they're simply a more comfortable trip, which matters as much as crowd levels when you're on your feet all day.