Thunder, lightning, wind, snow and frost are all different in different places. The conditions of air masses are extremely unstable. For example, in Taiwan the plum rains usually arrive in early May, but sometimes they saunter in at the end of May. Thus, with only a slight deviation, they can be off by an entire Solar Term (15 days).
雨是如此，雷電風雪霜，也都各地不同；何況氣團活動的狀況極不穩定，譬如台灣通常五月中入梅，但有時卻到五月底，梅雨才姍姍來遲，這樣一差就差了一個節氣（十五天）。