I have a dodgy thermometer on the wall, and I tend to enter the sauna when it shows 80, by the time I leave it's usually been showing 90 for half the time. Celcius.
Perhaps we are missing some details with respect to humidity?
If it's a very humid sauna at 90°F, then your body can't regulate itself with sweat evaporation.
weird huh, in neither system does 90 degrees make for a useful sauna. that's either lukewarm, or cooking temp.
90C is a normal sauna temperature. It's on the hot side, but normal.
Right you are. It's little a bit warm for my personal taste, but sure, for a 10 to 15 minute session, ok. It was late, and I was thinking more of the 90F as not even as hot as normal outdoors for many parts of the globe.