Do I need to be concerned about this?

I am growing Carmelicious. I have four in grow room, and six in my garden outdoors. The ones in grow room are on 20/4, in heated room, and doing spectacular. Plants in garden were twice as big as those in grow room when I put them in the ground, but now ones in grow room are twice as big. My concern is that here in Colorado, days have been in 60s-70s, and night get down as low as 40s. Is it the low temp slowing the growth outdoors? or is it just that the ones in grow room have heat and a lot more light? How important is temp when growing outdoors? We will see summer temps as high as low 100s, and nights will get to be as warm as low 70s. Still have probably 3.5 to 4 months off growing season to go.

i think the ones outside will catch up as the daylight hours and heat increase.

yea i was kinda wondering that too, cuz my seedlings are kinda slow right now, but everyones indoor seedling kicks my seedlings little asses