Garden rooms… sort of
I know our weather is not normally fantastic, and even in the hottest British weather, it seems to cool off drastically once the sun has gone down, whereas in hotter climes you can happily sit out ’till the early hours and the temp still be high enough to keep you amply warm. In the uk, once it’s dark, everyone is soon reaching for a sweater or a fleece.
Becoming more fashionable though recently, is having an outdoor fire. Just a simple fire pit made of steel works well, or one of those little clay chemineas that you see for sale in Spain. All can give sufficient extra heat to make it comfortable to stay outside.
If you have space, then the perfect answer is some sort of garden room. A sort of building with a proper roof but at least one fully open side. You then incorporate a proper stone fireplace in the wall, and you effectively have a living room outside. The other beauty of doing this method, is that if our changeable weather brings a summer shower (or summer storm!) then you have somewhere to shelter, or dry out in front of a roaring fire in your stone fireplace.
You can of course also leave soft furnishings in such a building: Probably not over the whole of winter, but certainly through the changeable days of spring and summer.
Having a roof and a stone fireplace, means you can use the room even if the weather looks like it may rain.