There is a little drop in the social side. But that is mostly because everyone else is staying home! Then again - who really enjoy the cold and the rain - unless there is a nice hot bath/shower near by! LOL
Sorry, Finy, We love staying home on hot days, even though we don't have air-con nor ceiling fans, just 1 floor fan to cover the whole house. As I'm writing this, the sweet is running down inside my dress, & it's 37/8c!
I actually go out more in the winter than I do in summer. The cold weather energises me, whereas the summer heat makes me feel lethargic. During winter I love to hike in the Perth Hills and cycle near the river, as well as visiting the city to shop and sightsee.
I'm reading this question, during a heatwave SUMMER in Sydney, '17! And no, we don't go out often in this stinking hOT weather! In winter we got out, when we need to go out, (e.g. my 3k morning walks, for shopping, on a lunch date or to Melbourne, to stay with our youngest daughter & to visit the 2 grand-daughters! That's about it!