I use to race a LACR year round, it would go from 4300 Ft. density altitude in the mornings before noon and go to above 7300 Ft density later in the after noon during July and August, I wouldn't change jets daily but I had the carbs jetted pretty lean for spring, fall and winter so most of my cars wouldn't change a bunch in the summer months due to density changes
My current S/P car runs on E85 and that rascal doesn't change any up here in Madras during the summer at 2500 Ft. above sea level form mornings to afternoons, E85 flat rock
The same jetting at Woodburn, Or (180 Ft. above sea level) ran 8.862 and 8.866 one hour later that morning in late July this past summer
I'm not chasing ET so as long as it repeats I'm happy