Horsefield, UK- when should i put outside

[Jemmaroo]

I have recently adopted a tortoise, currently he is living inside but I would like to know when I can put him in an outdoor enclosure? He is fully matured.
Lots of conflicting information online and I dont want to get it wrong,
Many thanks ?

 

[MichaelL]

Like temperature wise I would let him stay outside when the lows are 50s up. Since he's fully matured he'll be fine.