「天気」 (tenki) means "weather." It describes the atmospheric conditions, such as temperature, rain, sun, or wind, at a particular time and place. It's a common topic for daily conversation and planning activities.

「天気(てんき)」は、雨(あめ)や晴(は)れ、気温(きおん)など、その日(ひ)の空(そら)の状態(じょうたい)のことです。