Japan Meteorological Agency, which is a specialist for weather, determined to call fine weather in May as "satsukibare" and sunny spells during baiu season as "tsuyuno aimano hare" (sunny spells during baiu).
お天気の専門家である気象庁では、五月の晴れのことを「さつき晴れ」と呼び、梅雨時の晴れ間のことを「梅雨の合間の晴れ」と呼ぶように取り決めている。