overcast 雲に覆われている

overcast 一語で空が雲に覆われていると言う意味です。0:35 there's a little bit of overcast. so it's not as hot as it was last year. it was really hot last year. 今日は空一面雲に覆われているから、去年みたいには暑くないよ。去年はひどかったよ。

Sea turtles 'race' in the ocean during Tour de Turtles
https://www.youtube.com/watch?v=cufxjlHSNlw  1:09 my guess is I'm in for a cloudy and overcast. don't try and stop me 'cause I'm heading for that stormy weather soon.
Queen - My Melancholy Blues (BBC Version)