Publicly-funded school system teachers
Farmers in cash crops (especially 420, LOL!)
Virtually any government or quasi-government job.
Seasonal workers - It depends on their income, of course.
I know owners of golf courses who buzz off to their winter homes in Florida, Turks & Caicos, etc. Other staffers use the offseason to travel and backpack the world.
Many lower-income seasonal farm workers are migrant. They'll travel from place to place to work the crops when it's harvest time.
If they're smart, seasonal workers will find a complementary off-season income source. Like the landscaper who has a basement finishing gig for the winter.