The readings for these are both the kun'yomi readings. Hopefully you learned them when you were doing vocab in the previous levels so that all you have to do now is combine the two separate words into one bigger word. Please don't take a winter break until you figure this word out.
During winter break my family stayed in a hotel in the mountains.
Winter holiday was pretty tough because my sons fight so often at home.
During winter vacation, I jogged everyday, all day long.