I’ve learned that not wearing pyjamas just soaks the bed with sweat, so might as well wear them and just change them out in the middle of the night as and when needed.
I’ve learned that sleeping with the window open only does nothing but ensure that I hear the birds at 5 in the morning
I’ve learned that a decent blindfold works better than any curtain
If you don’t already, wear breathable pyjamas, and cotton bedsheet/duvet cover. And ideally, a non-synthetic duvet.
This will at least reduce the liquid sweat, by allowing it to evaporate better.Keeping track on when it’s hot/not/rainy can help get the house temperature under control.
When it gets cooler at night, you can open the windows to cool the fabric of the house down.
Then close everything up first thing in the morning, including south facing curtains.
The cooler you can get the house overnight, the more heat it can absorb the next day.So here, I left the window open on one room, (red) and closed on another (dark blue and teal).
When the outside temperature (purple) dropped to 15 overnight, it dragged the orange room down significantly.
(Then I forgot to close the window in the morning, so it kinda got negated 😬)Other than that, a dehumidifier may help if feeling less muggy, though it will raise the temperature of the room overall slightly, since it’s going to use energy to run.
Externally run aircon is, unfortunately, the only real step beyond that. And it’s a bit of a chunk of change (£500 for a basic DIY one, £1500+ for one room professionally).Blackout blinds and a fan does the job.
Much depends on the house. Traditional UK family housing with 2 plus stories and fron and back windows are far easier then modern subdivided multi flat buildings.
The older building allowed concentrating on air flow by opening highest widows and drawing curtains that face the mid day sun. While opening lower windows on the low sun side. During the night crated a natural flow of air.
Modern housing means the internal divisions and often lack of non concreted areas. Often prevent cooler air being able to flow. Or existing if the concrete hass 0 shading from the days sun,
Single level can still do it. But much less effective as the temp difference is less. But when the internal layout limits airflow from the high sun to low non sun side. Way harder.
Downstairs fans running overnight while sleeping with upstairs top windows open. Can be a huge difference.
Or just remembering the direction goal of fans. iE removing higher air while pulling in from lower.
It’s common for folks to place the fan between them and the window blowing at the bed. This is the worst thing as you are preventing hot air from leaving. Assuming you are not on the lowest floor.