A range drop in warmer weather with a GV60 Performance, especially in the mid-Atlantic, doesn't sound right. While some range variation is normal with temperature changes and driving style, a big drop in the 70s-90s is a red flag. Max auto-regen should actually help your range in city driving, so that's not the culprit. I'd definitely check if there have been any recent software updates – sometimes they can inadvertently affect efficiency. Also, tire pressure is crucial, so make sure they're at the recommended levels. Beyond that, it's worth getting it checked by the dealer. There could be a battery health issue, a problem with the cooling system (especially important in the heat), or even something draining power when the car is off.