天气的影响可以用英语表达为 "the impact of the weather"。这个表达的来源是由两个词组合而成的："impact" 和 "weather"。"Impact" 是一个名词，指的是对事物造成的影响或冲击；"weather" 是一个名词，指的是天气。因此，"the impact of the weather" 意思就是天气对事物造成的影响。
例句：
The impact of the weather can be seen in many ways, such as how it affects people's moods and activities.
天气的影响可以从许多方面看出，比如它对人们的情绪和活动的影响。
The impact of the weather on agriculture is significant, as changes in temperature and precipitation can affect crop yields.
天气对农业的影响是巨大的，温度和降水的变化会影响农作物的产量。
The impact of the weather on transportation can be significant, as heavy rain or snow can make roads spppery and dangerous.
天气对交通的影响是巨大的，因为大雨或大雪会使道路变得滑溜和危险。