When do you think is the best time to go to an amusement park? Why?

I think the day that there aren't many people is the best time to go to there. It's because I don't like crowded places. I don't like to wait in lines. So, I usually don't go to there on holidays. I know It's selfish. But I wish there weren't = aren't many people in amusement parks, when I go to there. And, I'd rather to go there in summer than in winter. It's because If = if I had to wait in lines in summer, It's more = it's much warmer than in winter.