North wind
A wind blowing steadily from the cold quarter — a specific direction of weather that carries a particular character with it.
A north wind in a dream is the dream's image of weather that arrives with a known character because of the quarter it comes from. The north wind is not just any wind; it brings cold, it brings clarity, it dries the ground, and old farmers know what to do with the fields when it sets in. The dream brings the north wind when something in your life — a piece of news from a particular source, a season-change in a relationship, an influence from a specific person — has arrived from a known direction and is bringing the character the direction implies. A north wind taken with the right layers is the dream affirming that the direction was read and prepared for. A north wind met in summer clothes is the dream noting that the quarter the wind came from was not paid attention to, and the cold is now in the room with you.