天气冷且下雪可以用"cold and snowy"来表示。
其中, "cold" 是形容词，表示冷的；"snowy" 是形容词，表示下雪的。
下面是一些例句:
It's cold and snowy outside. (外面天气冷且下雪)
The forecast is calpng for cold and snowy weather. (天气预报预计天气将会冷且下雪)
The roads are icy and spppery due to the cold and snowy conditions. (由于天气冷且下雪，道路变得冰冷和滑溜)