I don’t think it’d bother me to roast it. It’s very hot here (SW London) but with windows and back door open, plus the extractor on, it wouldn’t be too bad.
I wouldn’t cook it at lunchtime, though - roasts in this house are always an evening meal.
Funny how people in much hotter countries than the U.K. - even those without aircon as standard, still habitually eat hot food.
I have a Singaporean SiL who doesn’t consider any meal a Proper one, if it’s not cooked and served hot!
I have a Roast Dilemma today too - I have a chicken that should be cooked soon, but dh is going to be out all day, probably not back until 8 ish, and will have eaten.
So I’m going to roast the chook anyway, and make plenty of gravy, but have some cold for myself later, with salad.
Tomorrow I’ll heat up some of it in the gravy - until recently I’d never thought I’d do this but it works pretty well - and serve with the usual. Even possibly roast potatoes, since dh loves them.