expression
pleasantly cool (as autumn arrives)
Archaic seasonal expression for the refreshing coolness felt when autumn begins. Not used in modern everyday speech; encountered mainly in classical poetry or historical texts.
See also: 秋涼 (しゅうりょう)
「秋涼し」は、秋の訪れを感じさせる古い言い回しである。
"秋涼し" is an old phrase that evokes the arrival of autumn.