What night-time low is too warm to sleep comfortably? (temperature, degree, humidity)

[Trimac20]

If you had no A/C, when does it start to feel distinctly sultry and steamy, so much so you have difficulty sleeping? I know some actually find this helpful for sleep, but not me...

Personally, my ideal night-time temp for sleeping is about 14C...anything about 20C is warm, but anything above 24C and it feels very uncomfortable. Without a breeze I feel sweaty and itchy. Which is why I doubt I'd want to live in most of the lowland south of the US.

What about you?

[§AB]

I'd say about 23-24ºC. It's not so much the temp, but the lack of movement of the air in the enclosed space of a bedroom that makes it oppressive.

I don't mind cold temps when I'm sleeping.

[Botev1912]

above 20C is very uncomfortable

[RichardW]

In England, people start to complain when it doesn't go below about 12c!!

For me, around 20c and above would be uncomfortable. It also depends how humid it is though.

[dxiweodwo]

Above 65 degrees is pretty uncomfortable. One reason i like cold weather so much is because I can sleep much better in it.

[bs13690]

I don't mind cold temps when I am sleeping. Anything above 75 gets uncomfortable to me for sleeping.

[susancruzs]

Overnight temp of 70's is pretty uncomfortable, especially with humidity!

[Westerner92]

I hate that in-between temperature when it's too warm to have any covers but too cool to not have any covers. Does anyone else have that problem?

[trlhiker]

Above 70 is too uncomfortable add humidity and then we are talking above 60.

[ColdCanadian]

Originally Posted by §AB

I'd say about 23-24ºC. It's not so much the temp, but the lack of movement of the air in the enclosed space of a bedroom that makes it oppressive.

I don't mind cold temps when I'm sleeping.

Lack of air movement?
Have you ever tried a ceiling fan?