Meteorology is the science of weather: why it rains, how a typhoon grows, what the air is doing today and what it will likely do tomorrow. It is the study, not the weather itself — you do not 'have meteorology' the way you have rain. People stretch this word very little; it stays a school-and-science word. In daily talk we just say the weather. Though actually, it is also not climatology. Climate is the usual weather of a place over many years; meteorology is closer to what the sky is doing now, and next. Satellites, balloons, radar, and computer models are all tools of meteorology now, so the old picture of a person only staring at clouds is too small.