also: しゅうせい
noun
clear autumn weather; fine fall day
Refers to the bright, clear skies typical of autumn in Japan. Often used in weather forecasts or seasonal descriptions.
今日は秋晴れの気持ちのいい一日だった。
Today was a pleasant day with clear autumn weather.
週末は秋晴れが続くでしょう。
The fine autumn weather will continue through the weekend.