One degree. It’s one degree Fahrenheit. If we multiplied the temperature by 30, it would still be below freezing. Even when it’s 0°, we use the plural. Zero degreeS. But not at 1°. In the infinity of numbers, we have reached the only instance in which we use the singular “degree.” It’s a special kind of cold. I thought I woke up with morning wood. Turns out my dick was just frozen to my leg. I’m really goddamned cold is the point I’m trying to convey.