Horrendous. I have a small air circulator fan I bought after last year, but it feels like it's making naff all difference. ~26c downstairs, coming close to 28c in my front bedroom. The fan is downstairs trying to blow some cooler air upstairs. My WFH/PC room must be 30c at least right now. Windows are closed and curtains have been drawn all day.
24ºC in the main bedroom too. Overnight temps will barely dip below 19C so even with a windows open night (letting in all the noise and pollen) it's going to be uncomfortable 