"Average".
My average daytime temp is 96.8. My lowest morning wake-up temp is 95.7 (not far from clinical hypothermia).
Back in the 80's a group of foreign researchers did some great research on this topic: https://youtu.be/5c1m2BAg2Sc
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To answer these questions, he intends to pair his app with wearable thermometers, which can send continuous readings to the app and collect higher quality data as a result. "If we have enough people wearing those gadgets," Hausmann adds, "we could understand fever patterns of different illnesses."
It's certainly not. Having steam in your veins is very unhealthy, and depending on your elevation that's above the boiling point.