How long is your summer? (Summer is defined as temperatures during the day at 80 or above)
Also, how do you heat your homes? Do you use nuclear or geothermal?
Welcome to FR
Depends on where in Sweden you are. There is a huge difference between the northern and southern parts when it comes to day temperature. Usually though the temperature will only go above 26C a few days each year so using your definition we don’t have summer.
Heating our homes is usually either electric heating (Hydro/Nuclear), Geothermal and District Heating. I hope that last one is correct.
Thanks for the welcome!