noun
chilly spring weather; spring chill
Refers to the unseasonably cold weather that often occurs around the time cherry blossoms bloom (late March to early April). A seasonal word (kigo) used especially in haiku and weather reports.
花冷えの一日で、お花見にはコートが必要だった。
It was a day of spring chill, so we needed coats for cherry blossom viewing.
今週は花冷えが続く見込みです。
Spring chill is expected to continue this week.