1Exactly 12:00 in the daytime; the moment the sun is at its highest point in the day.
正午のサイレンが街中に鳴り響いた。
The noon siren echoed throughout the town.
明日は正午から会議室で打ち合わせがあります。
Tomorrow there's a meeting in the conference room starting at noon.
正午近くになると、気温がぐんぐん上がってきた。
As it got close to noon, the temperature kept climbing rapidly.
天気予報によると、正午には雨が上がるそうだ。
According to the weather forecast, the rain should stop by noon.