I worked for a Cypriot boss. His wife hated it there for more than just a couple of weeks, having moved here when she was five. Her parents said they'd never move back until they were ready for her father to retire, all the children were grown up and there was no need for them anymore.
He used to go over every summer for his birthday and at random times over the year - and she'd normally stay here with the children for most of it. He'd left Nicosia in his early 20s - but when he phoned me to check on the office, he'd be grumbling about it being too bloody hot at 30 Celsius in December. He said that he did miss his parents, but there was no way he'd ever want his children brought up in Cyprus.
His way of making sure they weren't isolated was sending the kids to Greek School every Saturday, attending the Orthodox Church and generally being part of the UK Cypriot community.
Another friend married into a Cypriot family. All but the great grandparents live over here and again, have no intention of going back until they are ready to retire. She's not bothered by this, as she says she adores extremely hot weather, but she wouldn't want to live there now when her children are young.
My DP, like me and a lot of British people, absolutely hate hot places. We feel sick, dizzy, get heatstroke almost as soon as it hits 22 Celsius, burn to a crisp if the sun comes out in winter (yep, I got sunburn on my nose and forehead the other week, from walking home for ten minutes). It's just not an environment we would be physically able to handle, even with air conditioning, because the Outside doesn't have any.
If you stay here, you will be fine. Because that's what people do - they make things work out. Perhaps he'll feel differently in time, but you'll need to talk about it, rather than argue.