It does get dark here late. Day length in Seattle goes up to 16 hours on the solstice, sunrise at 5:11 and sunset at 9:11
But even this time of year, a few weeks after solstice, at 1 AM or so if you go out and it’s clear and moonless, you will STILL see a “trace” of morning light on the extreme northern horizon!
Of course the opposite is true during winter, when at winter solstice, the highest the sun gets in the sky - 19 degrees!
That’s like holding your fist at arms length!
Boston's pretty easily to get during the day.
New York is easy to hear at night. As early as 4pm in the winter.
Chicago's pretty good at night too.